Fire alarm button and fire alarm system

Abstract

The utility model provides a fire alarm button and a fire alarm system. The fire alarm button comprises an explosion-proof housing which is provided with an electrical explosion-proof cavity; the circuit board assembly is accommodated in the electrical explosion-proof cavity, and the circuit board assembly is used for being electrically connected with an alarm; the front cover assembly is arranged on one side of the explosion-proof shell, and an accommodating space is formed between the front cover assembly and the explosion-proof shell; and at least one part of the triggering assembly is accommodated in the accommodating space, and the at least one part of the triggering assembly can be used for triggering the circuit board assembly to generate an alarm signal. The explosion-proof alarm button solves the problem that an explosion-proof alarm button in the prior art is complex in structure and not beneficial to installation and maintenance.

Description

Technical Field

[0001] The utility model relates to the technical field of fire-fighting equipment, and more specifically, to a fire alarm button and a fire alarm system. Background Art

[0002] At the work sites in high-risk industries such as petroleum, chemical, thermal power, and nuclear power, the environment is complex and full of potential risk factors. The natural presence or accidental leakage of gases such as methane, hydrogen sulfide, carbon monoxide, and oxygen poses special challenges. The accumulation of combustible gases such as methane and hydrogen sulfide, once reaching the explosion limit and encountering an ignition source, is extremely likely to trigger catastrophic explosion accidents. However, the manual alarms in the fire alarm system face additional tests in these special environments. In the initial stage of a fire, especially when the fire detectors fail to respond in a timely manner, the manual alarms triggered manually by personnel become the key to sending out alarms in a timely manner. Such alarms hardly have false alarms, and their accuracy and timeliness play an irreplaceable role in fire control. However, traditional manual alarms often neglect the safety and reliability in an explosive environment during design, and their structures and materials may be damaged by the explosion shock, resulting in functional failure and inability to continue sending alarm signals. Currently, in order to cope with the explosive environment, explosion-proof alarms are available on the market. By separating the circuit board and mechanical structural parts from the external environment with two shells, the internal structural parts are protected when an explosion or fire occurs outside. However, this method places all structural parts inside the shell, resulting in a complex internal structure, cumbersome installation, and inconvenient maintenance.

[0003] As can be seen from the above, there is a problem in the prior art that the structure of the explosion-proof alarm button is complex and not conducive to installation and maintenance. Summary of the Utility Model

[0004] The main purpose of the utility model is to provide a fire alarm button and a fire alarm system to solve the problem in the prior art that the structure of the explosion-proof alarm button is complex and not conducive to installation and maintenance.

[0005] To achieve the above object, according to one aspect of the utility model, there is provided a fire alarm button, including: an explosion-proof shell having an electrical explosion-proof cavity; a circuit board assembly accommodated in the electrical explosion-proof cavity and used for electrically connecting with an alarm; a front cover assembly disposed on one side of the explosion-proof shell and forming an accommodation space therebetween; a trigger assembly, at least a part of which is accommodated in the accommodation space, and at least a part of the trigger assembly can be used to trigger the circuit board assembly to generate an alarm signal.

[0006] Further, the triggering component includes: a triggering portion, which is movably connected to the front cover component and can further move into the accommodating space when triggered by an external force; a locking portion, which is arranged in the accommodating space and can lock and limit the triggering portion.

[0007] Further, the triggering portion is pivotally connected to the front cover component; and / or the triggering portion includes a triggering plate, the first side edge of the triggering plate is connected to the front cover component, the second side edge of the triggering plate cooperates with the locking portion, and the first side edge and the second side edge are respectively located on opposite sides of the triggering plate; and / or the middle region of the triggering portion is a force application region.

[0008] Further, the locking portion is arranged in abutment with the triggering portion. As the triggering portion moves, the locking portion moves and stops and limits the triggering portion after the triggering portion moves in place.

[0009] Further, the locking portion is rotatably or slidably arranged in the accommodating space.

[0010] Further, the triggering component further includes a reset member, and the reset member provides a reset force for the locking portion.

[0011] Further, the locking portion includes: a mounting seat, which is arranged on one of the explosion-proof housing and the front cover component; a locking member, one end of the locking member is a locking end for locking and triggering the triggering portion, and the other end of the locking member is pivotally connected to the mounting seat.

[0012] Further, the fire alarm button further includes: a reset key, which can pass through the front cover component to operate the locking portion.

[0013] Further, one side of the explosion-proof housing facing the front cover component has an opening. The explosion-proof housing includes a housing portion and a sealing cover. The housing portion facing the front cover component has an opening, and the sealing cover is covered on the opening, and at least a part of the sealing cover is accommodated in the accommodating space.

[0014] Further, at least a part of the triggering member of the circuit board component extends into the sealing cover, and the triggering portion presses the triggering member through the sealing cover.

[0015] Further, the fire alarm button further includes a pressing elastic member, which is arranged at the end of the triggering member away from the circuit board. One end of the pressing elastic member abuts against the pressing silica gel, and the other end of the pressing elastic member abuts against the triggering member. The pressing elastic member is used to reset the pressing silica gel.

[0016] Further, an abutting protrusion is arranged at one end of the triggering member for abutting against the pressing elastic member.

[0017] Further, the fire alarm button further includes a retaining ring limit, which is detachably connected to the triggering member and is arranged at the end of the triggering member away from the abutting protrusion.

[0018] Further, the sealing cover is hermetically connected to the housing portion; and / or the sealing cover is made of a deformable material.

[0019] Further, the housing portion includes: a first housing; a second housing, the second housing is detachably and hermetically connected to the first housing, an electrical explosion-proof chamber is formed between the second housing and the first housing, a front cover assembly is disposed on a side of the second housing away from the first housing, and an accommodation space is formed between the front cover assembly and the second housing.

[0020] Further, the front cover assembly is detachably connected to the second housing.

[0021] Further, the fire alarm button further includes a plugging member, a communication hole is formed on the first housing, and the plugging member is disposed at the communication hole for plugging the electrical explosion-proof chamber.

[0022] According to another aspect of the present invention, there is provided a fire alarm system, including: the above-mentioned fire alarm button; an alarm, the alarm is electrically connected to the fire alarm button.

[0023] Applying the technical solution of the present invention, the fire alarm button includes an explosion-proof housing, a circuit board assembly, a front cover assembly and a trigger assembly. The explosion-proof housing has an electrical explosion-proof chamber. The circuit board assembly is accommodated in the electrical explosion-proof chamber. The circuit board assembly is used for electrically connecting with the alarm. The front cover assembly is disposed on one side of the explosion-proof housing and an accommodation space is formed therebetween. At least a part of the trigger assembly is accommodated in the accommodation space, and at least a part of the trigger assembly can be used to trigger the circuit board assembly to generate an alarm signal. By providing the explosion-proof housing, the circuit board assembly is placed in the electrical explosion-proof chamber of the explosion-proof housing, and the trigger assembly is disposed in the accommodation space formed by the front cover assembly and the explosion-proof housing. When in use, the circuit board assembly can be triggered by the trigger assembly. The circuit board assembly and the trigger assembly are respectively disposed in the electrical explosion-proof chamber and the accommodation space. During installation, the circuit board assembly can be installed first and then the trigger assembly, realizing rapid installation. During maintenance, the trigger assembly and the circuit board assembly can also be maintained separately, simplifying the structure of the fire alarm button and facilitating installation and maintenance. At the same time, if a fire and explosion occur to the circuit board assembly disposed in the electrical explosion-proof chamber, the flame following the explosion will not leak, solving the problem in the prior art that the structure of the explosion-proof alarm button is complex and not conducive to installation and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The specification drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0025] Figure 1 shows a structural schematic diagram of the fire alarm button from an angle in a specific embodiment of the present invention; and

[0026] Figure 2 Shows an exploded view of a fire alarm button in a specific embodiment of the present utility model;

[0027] Figure 3 Shows a structural schematic diagram of the fire alarm button from another angle in a specific embodiment of the present utility model.

[0028] Among them, the above-mentioned drawings include the following reference numerals:

[0029] 10, explosion-proof housing; 11, first housing; 12, second housing; 13, sealing cover; 20, circuit board assembly; 21, trigger member; 22, PCB board; 23, abutting projection; 30, front cover assembly; 40, trigger assembly; 41, trigger part; 42, locking part; 421, mounting seat; 422, locking member; 43, reset member; 50, reset key; 60, pressing elastic member; 70, retaining ring limit; 80, plugging member; 90, sealing ring. Detailed implementation manners

[0030] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. The present utility model will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0031] It should be pointed out that, unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0032] In the present utility model, unless otherwise stated, the orientation terms such as "upper, lower, top, bottom" are generally in the direction shown in the drawings, or in the vertical, perpendicular or gravitational direction of the component itself; similarly, for the convenience of understanding and description, "inner, outer" refer to the inner and outer of the contour of each component itself, but the above orientation terms do not limit the present utility model.

[0033] Obviously, the above-described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0034] In order to solve the problem that the structure of the existing explosion-proof alarm button is complex and not conducive to installation and maintenance, the present utility model provides a fire alarm button and a fire alarm system.

[0035] Such as Figures 1 to 3As shown in the figure, the fire alarm button includes an explosion-proof housing 10, a circuit board assembly 20, a front cover assembly 30, and a trigger assembly 40. The explosion-proof housing 10 has an electrical explosion-proof chamber. The circuit board assembly 20 is accommodated in the electrical explosion-proof chamber, and the circuit board assembly 20 is used for electrically connecting with an alarm. The front cover assembly 30 is arranged on one side of the explosion-proof housing 10 and forms an accommodation space therebetween. At least a part of the trigger assembly 40 is accommodated in the accommodation space, and at least a part of the trigger assembly 40 can be used to trigger the circuit board assembly 20 to generate an alarm signal.

[0036] By providing the explosion-proof housing 10, the circuit board assembly 20 is placed in the electrical explosion-proof chamber of the explosion-proof housing 10, and the trigger assembly 40 is arranged in the accommodation space formed by the front cover assembly 30 and the explosion-proof housing 10. When in use, the circuit board assembly 20 can be triggered by the trigger assembly 40. The circuit board assembly 20 and the trigger assembly 40 are respectively arranged in the electrical explosion-proof chamber and the accommodation space. During installation, the circuit board assembly 20 can be installed first and then the trigger assembly 40, achieving rapid installation. During maintenance, the trigger assembly 40 and the circuit board assembly 20 can also be maintained separately, simplifying the structure of the fire alarm button and facilitating installation and maintenance. At the same time, even if a fire and explosion occur to the circuit board assembly 20 arranged in the electrical explosion-proof chamber, the explosion flame will not leak.

[0037] As Figure 2 shown in the figure, the trigger assembly 40 includes a trigger part 41 and a locking part 42. The trigger part 41 is movably connected to the front cover assembly 30 and can further move into the accommodation space when being triggered by an external force. The locking part 42 is arranged in the accommodation space and can lock and limit the trigger part 41.

[0038] Specifically, through the action of an external force, the trigger part 41 can move along a direction away from the front cover assembly 30, thereby triggering the circuit board assembly 20. After triggering, the trigger part 41 is locked by the locking part 42, so as to realize continuous triggering of the circuit board assembly 20 without the user applying an external force for a long time.

[0039] In this embodiment, the trigger part 41 is pivotally connected to the front cover assembly 30. The trigger part 41 includes a trigger plate. The first side edge of the trigger plate is connected to the front cover assembly 30, and the second side edge of the trigger plate cooperates with the locking part 42. The first side edge and the second side edge are respectively located on opposite sides of the trigger plate. The middle area of the trigger part 41 is a force application area.

[0040] Specifically, the trigger part 41 is a trigger plate. A connection structure is arranged on one side edge of the trigger part 41 close to the front cover assembly 30, and the trigger part 41 is pivotally connected to the front cover assembly 30 through the connection structure. When a fire is detected, by applying an external force to the middle area of the trigger part 41, the trigger part 41 is moved away from the front cover assembly 30 to trigger the circuit board assembly 20, and then the locking part 42 locks the trigger part 41, and the user can quickly leave.

[0041] In this embodiment, the locking portion 42 is in abutting contact with the triggering portion 41. Along with the movement of the triggering portion 41, the locking portion 42 moves, and after the triggering portion 41 moves in place, it stops and limits the triggering portion 41.

[0042] Specifically, when the triggering portion 41 moves, the locking portion 42 first moves along a direction away from the edge of the triggering portion 41. When the triggering portion 41 triggers the circuit board assembly 20, the locking portion 42 resets to achieve locking and limiting of the triggering portion 41.

[0043] In this embodiment, the locking portion 42 is rotatably arranged in the accommodating space.

[0044] In another embodiment (not shown) of the present application, the locking portion 42 slides in the accommodating space. Optionally, a guide rail is provided on the explosion-proof housing 10, and the locking portion 42 is slidably arranged on the guide rail. When the triggering portion 41 moves, the locking portion 42 first moves away and then approaches.

[0045] As Figure 2 shown, the locking portion 42 includes a mounting seat 421 and a locking member 422. The mounting seat 421 is arranged on one of the explosion-proof housing 10 and the front cover assembly 30. One end of the locking member 422 is a locking end, and the locking end is used to lock the triggering portion 41. The other end of the locking member 422 is pivotally connected to the mounting seat 421.

[0046] Specifically, the mounting seat 421 is connected to the explosion-proof housing 10 by screws. The locking end of the locking member 422 is provided with a wedge-shaped structure, which is generally hook-shaped. When the triggering portion 41 moves, the triggering portion 41 abuts against the wedge-shaped structure to cause the locking member 422 to rotate along a direction away from the triggering portion 41. When the triggering portion 41 finishes moving along the surface of the wedge-shaped structure, the locking member 422 returns and hooks and limits the edge of the triggering portion 41.

[0047] As Figure 2 shown, the triggering assembly 40 further includes a reset member 43, and the reset member 43 provides a reset force for the locking portion 42.

[0048] Specifically, a receiving groove is provided on the locking member 422. One end of the reset member 43 partially extends into the receiving groove, and the other end is arranged on the explosion-proof housing 10. When the triggering portion 41 approaches the explosion-proof housing 10 and moves away from the locking end, the triggering portion 41 does not provide a abutting force to the locking member 422. The reset force of the reset member 43 causes the locking member 422 to reset, thereby achieving that the locking end abuts and limits the edge of the triggering portion 41.

[0049] In this embodiment, the reset member 43 is a reset spring.

[0050] As Figures 1 to 3As shown, the fire alarm button further includes a reset key 50, and the reset key 50 can pass through the front cover assembly 30 to operate the locking part 42.

[0051] Specifically, one end of the reset key 50 has a protrusion and is arranged in the accommodation space, and the other end is located outside and is provided with a gripping end. When the fire is controlled or eliminated, the user can pinch the gripping end and rotate the reset key 50. During this process, the protrusion of the reset key 50 abuts against the locking end to apply a resisting force to the locking end, thereby driving the locking member 422 away from the triggering part 41, so as to release the lock.

[0052] In this embodiment, the front cover assembly 30 is provided with a mounting hole. After the reset key 50 extends into the accommodation space, the middle part of the reset key 50 is pivotally connected to the mounting hole to prevent the reset key 50 from being lost.

[0053] As Figure 2 shown, one side of the explosion-proof housing 10 facing the front cover assembly 30 has an opening. The explosion-proof housing 10 includes a housing part and a sealing cover 13. One side of the housing part facing the front cover assembly 30 has an opening, and the sealing cover 13 is covered at the opening, and at least a part of the sealing cover 13 is accommodated in the accommodation space.

[0054] Specifically, one end of the opening is adapted to the triggering part 41 to prevent the triggering part 41 from detaching along the opening. The sealing cover 13 is detachably connected to the explosion-proof housing 10, and the sealing cover 13 is slightly larger than the opening, so as to realize that the sealing cover 13 seals the electrical explosion-proof chamber.

[0055] In this embodiment, the sealing cover 13 is hermetically connected to the housing part. The sealing cover 13 is made of a deformable material.

[0056] Specifically, the sealing cover 13 is made of silicone or rubber. Even if the sealing cover 13 deforms after being squeezed, it will not cause air leakage at the opening, effectively preventing external dust or gas from entering the electrical explosion-proof chamber and detonating the circuit board assembly 20.

[0057] In another alternative embodiment of the present application, one end of the sealing cover 13 is made of a rigid material and the other end is made of a deformable material, so as to ensure that the part of the sealing cover 13 at the opening will not deform, thereby preventing dust from entering the electrical explosion-proof chamber.

[0058] In this embodiment, at least a part of the triggering member 21 of the circuit board assembly 20 extends into the sealing cover 13, and the triggering assembly 40 presses the triggering member 21 through the sealing cover 13.

[0059] Specifically, the circuit board assembly 20 further includes a PCB board 22, which is disposed in the electrical explosion-proof cavity. A key is provided on the PCB board 22. One end of the trigger member 21 abuts against the key, and the other end extends out of the opening. Correspondingly, the sealing cover 13 protrudes in the direction close to the trigger portion 41 and is overall conical. Optionally, the distance from the end of the sealing cover 13 close to the trigger portion 41 to the PCB board 22 is the same as the length of the trigger member 21, so as to facilitate the quick triggering of the circuit board assembly 20.

[0060] As Figure 2 shown, the fire alarm button further includes a pressing elastic member 60, which is disposed at the end of the trigger member 21 away from the circuit board assembly 20. One end of the pressing elastic member 60 abuts against the sealing cover 13, and the other end of the pressing elastic member 60 abuts against the trigger member 21. The pressing elastic member 60 is used to reset the sealing cover 13.

[0061] Specifically, the pressing elastic member 60 is sleeved on the trigger member 21, so as to provide a deformation force for the restoration of the sealing cover 13. When the trigger portion 41 abuts against and presses the sealing cover 13, the sealing cover 13 deforms and drives the trigger member 21 to approach the PCB board 22, realizing that the trigger member 21 presses the key. When the locking state of the trigger portion 41 is released, the pressing elastic member 60 restores and pushes the sealing cover 13 to restore its deformation.

[0062] As Figure 2 shown, an abutting protrusion 23 is provided at one end of the trigger member 21, and the abutting protrusion 23 is used to abut against the pressing elastic member 60.

[0063] As Figure 2 shown, the fire alarm button further includes a retaining ring limit 70, which is detachably connected to the trigger member 21, and the retaining ring limit 70 is disposed at the end of the trigger member 21 away from the abutting protrusion 23.

[0064] Specifically, one end of the pressing elastic member 60 abuts against the abutting protrusion 23, and the other end abuts against the retaining ring limit 70. The retaining ring limit 70 can move along the axial direction of the trigger member 21. Pressing the trigger portion 41 will drive the sealing cover 13 to deform. The sealing cover 13 deforms in the direction towards the PCB board 22 and further drives the retaining ring limit 70 to approach the abutting protrusion 23, thereby compressing the pressing elastic member 60. When the trigger portion 41 is unlocked, the pressing elastic member 60 moves away from the abutting protrusion 23, and the elastic force generated by the pressing elastic member 60 acts on the retaining ring limit 70 to drive the sealing cover 13 to restore, and at the same time drive the trigger portion 41 to restore.

[0065] As Figures 1 to 3As shown in the figure, the housing part includes a first housing 11 and a second housing 12. The second housing 12 and the first housing 11 are detachably and sealingly connected, and an electrical explosion-proof cavity is formed between the second housing 12 and the first housing 11. The front cover assembly 30 is arranged on the side of the second housing 12 away from the first housing 11, and an accommodation space is formed between the front cover assembly 30 and the second housing 12.

[0066] Specifically, the PCB board 22 is connected to the bottom of the first housing 11 by screws, and a sealing ring 90 is also arranged between the first housing 11 and the second housing 12. When connecting, the first housing 11 and the second housing 12 are connected by bolts, and the sealing ring 90 can ensure the sealing effect of the electrical explosion-proof cavity.

[0067] In this embodiment, both the first housing 11 and the second housing 12 are aluminum pressings or steel castings. Thus, in an external high-temperature environment, the electrical explosion-proof cavity can still remain sealed. At the same time, when the internal PCB board 22 is short-circuited and catches fire or explodes, the generated flame is only in the electrical explosion-proof cavity and will not spread to other positions.

[0068] In this embodiment, the front cover assembly 30 is detachably connected to the second housing 12.

[0069] Specifically, the front cover assembly 30 is connected to the second housing 12 through bolts with the first housing 11. During maintenance, the front cover assembly 30 can be opened to complete the maintenance of the trigger assembly 40; or the first housing 11 can be disassembled to complete the inspection of the PCB board 22, which is also convenient for production and assembly and improves efficiency.

[0070] As Figures 1 to 3 shown, the fire alarm button further includes a plugging member 80. A communication hole is opened on the first housing 11, and the plugging member 80 is arranged at the communication hole for plugging the electrical explosion-proof cavity.

[0071] Specifically, a communication hole is respectively arranged on both sides of the first housing 11. The power line extends into the electrical explosion-proof cavity through the communication hole and is connected to the PCB board 22. The plugging member 80 ensures the sealing of the electrical explosion-proof cavity after the production of the fire alarm button is completed. And when the power line is inserted, a plugging member 80 with an opening is used to prevent flammable dust from entering the electrical explosion-proof cavity along the communication hole.

[0072] This application also provides a fire alarm system, which includes the above-mentioned fire alarm button and an alarm. The alarm is electrically connected to the fire alarm button.

[0073] Specifically, the alarm is arranged inside or outside the building. The two communication holes on the first housing 11 are respectively provided with a power line connected to the power supply and a connection line connected to the alarm.

[0074] From the above description, it can be seen that the above embodiments of the present utility model achieve the following technical effects: The fire alarm button includes an explosion-proof housing 10, a circuit board assembly 20, a front cover assembly 30, and a trigger assembly 40. The explosion-proof housing 10 has an electrical flameproof chamber, and the circuit board assembly 20 is accommodated in the electrical flameproof chamber. The circuit board assembly 20 is used to be electrically connected to the alarm. The front cover assembly 30 is arranged on one side of the explosion-proof housing 10 and forms an accommodation space therebetween. At least a part of the trigger assembly 40 is accommodated in the accommodation space, and at least a part of the trigger assembly 40 can be used to trigger the circuit board assembly 20 to generate an alarm signal. By providing the explosion-proof housing 10, the circuit board assembly 20 is placed in the electrical flameproof chamber of the explosion-proof housing 10, and the trigger assembly 40 is arranged in the accommodation space formed by the front cover assembly 30 and the explosion-proof housing 10. When in use, the circuit board assembly 20 can be triggered by the trigger assembly 40. The circuit board assembly 20 and the trigger assembly 40 are respectively arranged in the electrical explosion-proof chamber and the accommodation space. During installation, the circuit board assembly 20 can be installed first and then the trigger assembly 40, realizing rapid installation. During maintenance, the trigger assembly 40 and the circuit board assembly 20 can also be maintained separately, simplifying the structure of the fire alarm button and facilitating installation and maintenance. At the same time, even if a fire and explosion occur to the circuit board assembly 20 arranged in the electrical flameproof chamber, the explosion flame will not leak.

[0075] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0076] It should be noted that the terms "first", "second", etc. in the description, claims, and drawings of the present application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order different from those illustrated or described herein.

[0077] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, the present utility model can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A fire alarm button, characterized in that, Comprising: An explosion-proof housing (10), the explosion-proof housing (10) having an electrical flameproof chamber; A circuit board assembly (20), the circuit board assembly (20) being accommodated in the electrical flameproof chamber, the circuit board assembly (20) being used for electrically connecting to an alarm; A front cover assembly (30), the front cover assembly (30) being provided on one side of the explosion-proof housing (10) and forming an accommodation space therebetween; A trigger assembly (40), at least a part of the trigger assembly (40) being accommodated in the accommodation space, and at least a part of the trigger assembly (40) being capable of triggering the circuit board assembly (20) to generate an alarm signal.

2. The fire alarm button according to claim 1, characterized in that, The trigger assembly (40) includes: A trigger part (41), the trigger part (41) being movably connected to the front cover assembly (30) and being capable of further moving into the accommodation space when triggered by an external force; A locking part (42), the locking part (42) being provided in the accommodation space and being capable of locking and limiting the trigger part (41).

3. The fire alarm button according to claim 2, wherein The trigger part (41) is pivotally connected to the front cover assembly (30); and / or The trigger part (41) includes a trigger plate, a first side edge of the trigger plate is connected to the front cover assembly (30), a second side edge of the trigger plate cooperates with the locking part (42), and the first side edge and the second side edge are respectively located on opposite sides of the trigger plate; and / or A middle area of the trigger part (41) is a force application area.

4. The fire alarm button according to claim 2, characterized in that, The locking part (42) is arranged in abutment with the trigger part (41), and as the trigger part (41) moves, the locking part (42) moves and stops and limits the trigger part (41) after the trigger part (41) moves in place.

5. The fire alarm button according to claim 4, characterized in that, The locking part (42) is rotatably or slidably provided in the accommodation space.

6. The fire alarm button according to claim 4, characterized in that, The trigger assembly (40) further includes a reset member (43), the reset member (43) providing a reset force for the locking part (42).

7. The fire alarm button according to claim 4, wherein, The locking part (42) includes: A mounting seat (421), the mounting seat (421) being provided on one of the explosion-proof housing (10) and the front cover assembly (30); A locking member (422), one end of the locking member (422) being a locking end for locking the trigger part (41), and the other end of the locking member (422) being pivotally connected to the mounting seat (421).

8. The fire alarm button according to claim 2, characterized in that, The fire alarm button further includes: A reset key (50), the reset key (50) being capable of passing through the front cover assembly (30) to operate the locking part (42).

9. The fire alarm button according to any one of claims 1 to 8, characterized in that, One side of the explosion-proof housing (10) facing the front cover assembly (30) has an opening, the explosion-proof housing (10) includes a housing part and a sealing cover (13), one side of the housing part facing the front cover assembly (30) has an opening, the sealing cover (13) is covered on the opening, and at least a part of the sealing cover (13) is accommodated in the accommodation space.

10. The fire alarm button according to claim 9, characterized in that, At least a part of the trigger member (21) of the circuit board assembly (20) extends into the sealing cover (13), and the trigger assembly (40) presses the trigger member (21) through the sealing cover (13).

11. The fire alarm button according to claim 10, characterized in that, The fire alarm button further includes a pressing elastic member (60). The pressing elastic member (60) is disposed at one end of the trigger member (21) away from the circuit board assembly. One end of the pressing elastic member (60) abuts against the sealing cover (13), and the other end of the pressing elastic member (60) abuts against the trigger member (21). The pressing elastic member (60) is used to reset the sealing cover (13).

12. The fire alarm button according to claim 11, characterized in that, An abutting protrusion (23) is disposed at one end of the trigger member (21), and the abutting protrusion (23) is used to abut against the pressing elastic member (60).

13. The fire alarm button according to claim 12, characterized in that, The fire alarm button further includes a retaining ring limit (70). The retaining ring limit (70) is detachably connected to the trigger member (21), and the retaining ring limit (70) is disposed at one end of the trigger member (21) away from the abutting protrusion (23).

14. The fire alarm button according to claim 9, wherein the sealing cover (13) is hermetically connected to the housing portion; and / or the sealing cover (13) is made of a deformable material.

15. The fire alarm button according to claim 9, characterized in that, The housing portion includes: a first housing (11); a second housing (12). The second housing (12) and the first housing (11) are detachably and hermetically connected. An electrical explosion-proof chamber is formed between the second housing (12) and the first housing (11). The front cover assembly (30) is disposed on a side of the second housing (12) away from the first housing (11), and the accommodation space is formed between the front cover assembly (30) and the second housing (12).

16. The fire alarm button according to claim 15, characterized in that, The front cover assembly (30) is detachably connected to the second housing (12).

17. The fire alarm button according to claim 15, characterized in that, The fire alarm button further includes a plugging member (80). A communication hole is formed in the first housing (11), and the plugging member (80) is disposed at the communication hole for plugging the electrical explosion-proof chamber.

18. A fire alarm system, characterized in that, including: the fire alarm button according to any one of claims 1 to 17; an alarm, and the alarm is electrically connected to the fire alarm button.

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