CN113538831A

CN113538831A - Fire alarm easy to assemble

Info

Publication number: CN113538831A
Application number: CN202110787873.1A
Authority: CN
Inventors: 王利斌
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-07-13
Filing date: 2021-07-13
Publication date: 2021-10-22
Anticipated expiration: 2041-07-13
Also published as: CN113538831B

Abstract

The invention discloses a fire alarm convenient to install, which comprises an alarm body, wherein a top plate is arranged below the alarm body, a bottom plate is arranged below the top plate, an elastic shrinkage pipe is connected between the top plate and the bottom plate, one side of the elastic shrinkage pipe is communicated and connected with a micro air pump, two side walls of the top plate are connected with connecting transverse plates, a protection mechanism is arranged between the alarm body and the top plate, and a driving assembly is arranged on one side of the protection mechanism. According to the invention, by designing the protection mechanism and matching with the driving assembly, when a user accidentally uses an elbow or a hand to impact the pressing plate, the pressing plate descends very slowly due to the existence of the damping characteristic, so that the protection mechanism opens very slowly, and the time is enough for the user to react and leave the pressing plate, so that the situation that the protection mechanism opens due to accidental touch of the pressing plate is reduced, and the protection effect of the fire alarm is improved.

Description

Fire alarm easy to assemble

Technical Field

The invention relates to the technical field of fire fighting equipment, in particular to a fire fighting alarm convenient to install.

Background

The fire alarm is a safety setting which can be frequently seen in a building and is often used for detecting whether a large amount of smoke or high heat is generated, a fire alarm which is often called is one of fire alarms, according to the condition during actual installation, the fire alarm is generally installed at the position with large flow of people such as a passageway, a stair opening and the like of the building, when the fire alarm detects a fire, sound and flickering firelight can be generated to remind people in the building to pay attention, in addition, a plurality of fire alarms are provided with manual press buttons, and a user can send out alarm sound and flickering red light by pressing the manual press buttons.

The fire alarm with the manual button of pressing that has now is installed on the wall usually, does not have protection machanism or simple utilizes the plastic casing to come to shelter from the manual button of pressing, and the protective effect is relatively poor, and the personnel of passing by the alarm probably appear elbow or hand because of the accident and strike the manual button of pressing, do not have protection machanism this moment or simply utilize the alarm that the plastic casing sheltered from very easily by directly striking the manual button of pressing or hit garrulous plastic casing and bump the manual button of pressing again, very easily cause the wrong report.

Therefore, a fire alarm convenient to install is provided to solve the problems.

Disclosure of Invention

The invention aims to solve the defects in the prior art, and provides a fire alarm convenient to mount.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a fire alarm easy to assemble, includes the alarm body, alarm body below is provided with the roof, the bottom plate is installed to the below of roof, be connected with the elastic contraction pipe between roof and the bottom plate, one side of elastic contraction pipe communicates with each other and is connected with miniature aspiration pump, the both sides wall of roof all is connected with the connection diaphragm, the roof of bottom plate is located four corners position department and all installs the reinforcing connecting rod, a tip of reinforcing connecting rod passes the connection diaphragm and extends to and be connected with the stopper above the connection diaphragm, install protection machanism between alarm body and the roof.

Preferably, the protection mechanism comprises L-shaped protection plates located on two sides of the alarm body, a base is arranged below the L-shaped protection plates, linear slide rails are installed on two sides of the top wall of the base, a moving block is connected to one end of each L-shaped protection plate, a sliding block is connected to the other end of each L-shaped protection plate, the moving block and the sliding block are matched with the linear slide rails, an annular frame is installed between the base and the top plate, a driving assembly is installed on one side of the annular frame, and an auxiliary protection mechanism is installed between the two L-shaped protection plates.

Preferably, drive assembly is including setting up the drive box in annular frame one side, the top of drive box is provided with the clamp plate, the internally mounted of drive box has the damping telescopic link, one side of damping telescopic link is provided with the spur rack, logical groove has been seted up to the inside of spur rack, it is provided with down the dead lever to lead to inslot portion, the top of spur rack is connected with the dead lever, one side matching of spur rack is provided with the straight-teeth gear, a lateral wall of straight-teeth gear is connected with the drive lead screw.

Preferably, one end of the damping telescopic rod is fixedly connected with the top wall of the top plate, the piston rod at the output end of the damping telescopic rod penetrates through the inner top wall of the driving box body and extends to the upper part of the driving box body to be fixedly connected with one side wall of the pressing plate, one end of the upper fixing rod penetrates through the inner wall of the driving box body and extends to the upper part of the driving box body to be fixedly connected with one side wall of the pressing plate, and one end of the lower fixing rod is fixedly connected with the top wall of the top plate.

Preferably, the straight gear is located inside the driving box body, the driving screw rod is located inside the annular frame, and one end portion of the driving screw rod sequentially penetrates through the two moving blocks and extends to the position of the inner side wall of the annular frame to be rotatably connected with the annular frame.

Preferably, the bottom of the moving block is provided with a threaded hole, threads inside the threaded hole are matched with the structure of the driving screw rod, a square through hole is formed above the moving block and matched with the structure of the linear sliding rail, the vertical section of the sliding block is shaped like a v-21274, and the sliding block is matched with the structure of the linear sliding rail.

Preferably, supplementary protection machanism includes two sets of supplementary protection subassemblies, supplementary protection subassembly includes joint lug and the spill joint piece that is connected with two class L shape guard plates respectively, the joint lug with the structure looks adaptation of spill joint piece, joint lug one side is provided with the connection line body, the hole of accomodating has been seted up at the both ends of class L shape guard plate, a tip of the connection line body is located accomodates downthehole portion, another end connection of the connection line body has the connecting block.

Preferably, one end of the connecting wire body is fixedly connected with one side wall of the L-shaped protection plate through a connecting block, and the connecting block is matched with the structure of the accommodating hole.

Preferably, a sliding hole is formed in the surface of the base below the linear slide rail close to one side of the driving screw rod, and the moving block is located in the sliding hole.

Compared with the prior art, the invention has the beneficial effects that:

1. through the design of the protection mechanism, a moving block connected with one side of the bottom end of the similar L-shaped protection plate can move on a linear slide rail, a sliding block connected with the other side of the bottom end of the similar L-shaped protection plate can move on the other linear slide rail, so that the similar L-shaped protection plate can stably move above the base, meanwhile, the alarm body is shielded by two symmetrically arranged similar L-shaped protection plates, when the alarm body is shielded by the two similar L-shaped protection plates, the two sides of the alarm body can be completely blocked, the other two sides are not blocked, and the upper part of the alarm body is shielded to a certain degree, so that the alarm body is protected, and the condition of false alarm caused by the fact that a user accidentally touches the alarm body is avoided;

2. through designing the driving assembly to cooperate with the protection mechanism, the user continuously presses the pressing plate, so that the pressing plate presses the straight-tooth plate to move downwards, the damping lifting rod and the straight-tooth plate are driven to move downwards, and further the straight-tooth gear meshed with the straight-tooth plate rotates, so that the driving screw rod is driven to rotate, and the protection mechanism connected with the driving assembly is opened, so that an alarm body protected by the protection mechanism is exposed, so that the alarm is given out, after the alarm is given out, the user only needs to release the pressing plate, the pressing plate can be slowly lifted under the action of the damping telescopic rod, so that the straight-tooth plate slowly ascends, and the straight-tooth gear is driven to reversely rotate, so that the protection mechanism is folded, the alarm body is shielded, and because the damping buffer rod has the damping characteristic, when the user accidentally uses or uses hands to impact the pressing plate, because of the existence of the damping characteristic, according to the clamp plate decline very slowly, lead to protection machanism to open extremely slowly, this period of time is enough that the user reacts and leaves according to the clamp plate to reduce the unexpected condition that touches according to the clamp plate and lead to protection machanism to open, the protective effect further improves, and then avoids the condition of wrong report.

3. Through the integral structure designed by the invention, a user can install the bottom plate at a specified position only by installing the expansion screw, further change the pressure inside the elastic shrinkage pipe through the miniature air pump, utilize the pressure difference inside the elastic shrinkage pipe to be the upper structure change position, and simultaneously support the integral structure by utilizing the mutual matching of the reinforcing connecting rod and the connecting transverse plate, so that the firmness of the integral structure is improved, and the disassembly is simple only by disassembling the expansion screw.

Drawings

Fig. 1 is a schematic diagram of one side of the overall structure of a fire alarm convenient to install according to the invention.

Fig. 2 is a schematic diagram of the other side of the overall structure of the fire alarm convenient to install.

Fig. 3 is a partial structural schematic diagram of a fire alarm convenient to mount according to the invention.

FIG. 4 is a schematic view showing the structure of the ring frame, the driving case, the pressing plate and the upper portion of the base according to the present invention.

FIG. 5 is an enlarged view of the structure of FIG. 4A according to the present invention.

Fig. 6 is a schematic structural diagram of a driving assembly and a part of a shielding mechanism according to the present invention.

Fig. 7 is a schematic diagram of the structure of the upper part of the base in the fire alarm convenient to install.

Fig. 8 is a schematic structural diagram of a base and a top structure thereof according to the present invention.

Fig. 9 is a schematic bottom structure diagram of the protection mechanism according to the present invention.

Fig. 10 is a top structural view of the protection mechanism according to the present invention.

In the figure: 1. an alarm body; 2. a top plate; 3. a base plate; 4. an elastically contractible tube; 5. a micro air pump; 6. connecting the transverse plates; 7. a reinforcing connecting rod; 8. a limiting block; 9. an L-like shaped guard plate; 10. a base; 11. a linear slide rail; 12. a moving block; 13. a slider; 14. an annular frame; 15. a driving box body; 16. a pressing plate; 17. damping telescopic rods; 18. a spur plate; 19. a spur gear; 20. driving the screw rod; 21. a lower fixing rod; 22. an upper fixing rod; 23. a threaded hole; 24. a square through hole; 25. clamping the convex block; 26. a concave clamping block; 27. connecting the wire body; 28. a receiving hole; 29. connecting blocks; 30. a slide hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1-3, a fire alarm convenient to install comprises an alarm body 1, a top plate 2 is arranged below the alarm body 1, a bottom plate 3 is arranged below the top plate 2, the bottom plate 3 is arranged at a specified position during installation and then is fixed on a wall through an expansion screw, the bottom plate 3 is fixed, so that the whole structure is fixed at the specified position, an elastic shrinkage pipe 4 is connected between the top plate 2 and the bottom plate 3, a hollow space is formed inside the elastic shrinkage pipe 4, one side of the elastic shrinkage pipe 4 is communicated with a micro air pump 5, the air inside the elastic shrinkage pipe 4 is completely pumped out by the micro air pump 5, so that a negative pressure environment is formed inside the elastic shrinkage pipe 4, and the external environment is under atmospheric pressure, so that the elastic shrinkage pipe 4 shrinks, and the position of the top plate 2 changes, roof 2 is close to bottom plate 3's position, the both sides wall of roof 2 all is connected with connection diaphragm 6, the roof of bottom plate 3 is located four corners position department and all installs reinforcing connecting rod 7, a tip of reinforcing connecting rod 7 passes and connects diaphragm 6 and extends to and be connected with stopper 8 above connecting diaphragm 6, when roof 2 is close to bottom plate 3 position, reinforcing connecting rod 7 is in the inside removal of connecting diaphragm 6, thereby play the effect of support to connecting diaphragm 6, and the length of connecting diaphragm 6 removal is the length of reinforcing connecting rod 7, install protection machanism between alarm body 1 and the roof 2.

Referring to fig. 2 and 6, the protection mechanism includes L-like protection plates 9 located at two sides of the alarm body 1, when the L-like protection plates 9 are combined together, a protection housing is formed to protect the alarm body 1 inside, a base 10 is arranged below the L-like protection plate 9, a sliding hole 30 is arranged below a linear slide rail 11 located at one side close to a driving screw rod 20 on the surface of the base 10, a moving block 12 is located in the sliding hole 30, the moving block 12 moves inside the driving screw rod 20, when linear slide rails 11 are installed at two sides of the top wall of the base 10, a moving block 12 is connected to one end of the L-like protection plate 9, a sliding block 13 is connected to the other end of the L-like protection plate 9, the moving block 12 and the sliding block 13 are both matched with the linear slide rail 11, so that the moving block 12 and the sliding block 13 can move on the linear slide rail 11, and an annular frame 14 is installed between the base 10 and the top plate 2, a driving assembly is installed on one side of the annular frame 14, the L-shaped protection plates 9 are driven to move above the base 10 by the driving assembly, and an auxiliary protection mechanism is installed between the two L-shaped protection plates 9.

Referring to fig. 4-7, the driving assembly includes a driving case 15 disposed at one side of the ring frame 14, a pressing plate 16 is disposed above the driving case 15, a high temperature resistant inorganic material layer is disposed on an upper surface of the pressing plate 16, the pressing plate 16 is still at a temperature opposite to the bottom of the driving case when a fire occurs, so that a user can press the pressing plate 16 to apply power to the driving assembly, a damping telescopic rod 17 is disposed inside the driving case 15, one end of the damping telescopic rod 17 is fixedly connected to the top wall of the top plate 2, an output end piston rod of the damping telescopic rod 17 passes through the inner top wall of the driving case 15 and extends to a position above the driving case 15 and is fixedly connected to one side wall of the pressing plate 16, when the user presses the pressing plate 16, the pressing plate 16 is lowered to press the damping telescopic rod 17, and since the damping telescopic rod 17 has a damping characteristic, the user must continuously apply force to the pressing plate 16, the pressing plate 16 can be pressed down continuously, a straight tooth plate 18 is arranged on one side of the damping telescopic rod 17, a through groove is formed in the straight tooth plate 18, a lower fixing rod 21 is arranged in the through groove, one end of the lower fixing rod 21 is fixedly connected with the top wall of the top plate 2, an upper fixing rod 22 is connected to the top end of the straight tooth plate 18, one end of the upper fixing rod 22 penetrates through the inner wall of the driving box body 15 and extends to the upper side of the driving box body 15 to be fixedly connected with one side wall of the pressing plate 16, when the pressing plate 16 is pressed down, the pressing plate 16 enables the straight tooth plate 18 to be pressed down together through the upper fixing rod 22, at the moment, the lower fixing rod 21 can enter the through groove in the straight tooth plate 18 continuously, so that the straight tooth plate 18 is covered outside the lower fixing rod 21, after the pressing plate 16 is pressed down to the bottommost position, the lower fixing rod 21 extends to the highest position of the through groove in the straight tooth plate 18, a straight tooth gear 19 is arranged on one side of the straight tooth plate 18 in a matching manner, when the straight-tooth plate 18 moves downwards, the straight teeth on the surface of the straight-tooth plate 18 can drive the meshed straight gear 19 to rotate, the straight gear 19 is located inside the driving box body 15, one side wall of the straight gear 19 is connected with the driving screw rod 20, when the straight gear 19 rotates, the straight gear 19 can drive the driving screw rod 20 to rotate together, the driving screw rod 20 is located inside the annular frame 14, one end part of the driving screw rod 20 sequentially penetrates through the two moving blocks 12 and extends to the position of the inner side wall of the annular frame 14 to be rotationally connected with the annular frame 14, the driving screw rod 20 is grabbed to be scratched, two moving blocks 12 connected with the outside of the driving screw rod 20 are made to move, and therefore the position of the L-shaped protection plate 9 is changed.

Referring to fig. 6-9, a threaded hole 23 is formed at the bottom of the moving block 12, threads inside the threaded hole 23 are matched with the structure of the driving lead screw 20, when the driving lead screw 20 rotates, the moving block 12 moves outside the driving lead screw 20, so as to change the position of the moving block 12, a square through hole 24 is formed above the moving block 12, the square through hole 24 is matched with the structure of the linear slide rails 11, when the moving block 12 moves outside the driving lead screw 20, the moving block 12 also moves outside the linear slide rails 11, and the linear slide rails 11 support the moving block 12, the vertical cross-sectional shape of the slider 13 is set to be 21274, the slider 13 is matched with the structure of the linear slide rails 11, when the moving block 12 moves on one of the linear slide rails 11, the slider 13 moves outside the other linear slide rail 11, so that the slider 13 and the moving block 12 move synchronously above the two linear slide rails 11, and further ensures stability when the L-like shield 9 is moved over the base 10.

Referring to fig. 8-the base 10, the auxiliary protection mechanism includes two sets of auxiliary protection components, the two sets of auxiliary protection components are arranged in parallel, the auxiliary protection components include a clamping convex block 25 and a concave clamping block 26 respectively connected with two L-shaped protection plates 9, the clamping convex block 25 and the concave clamping block 26 are matched in structure, when the two L-shaped protection plates 9 are continuously close to each other, the clamping convex block 25 and the concave clamping block 26 are matched together, so as to shield the upper part of the alarm body 1, a connection wire body 27 is arranged on one side of the clamping convex block 25, receiving holes 28 are arranged on two end parts of the L-shaped protection plates 9, one end part of the connection wire body 27 is arranged inside the receiving hole 28, when the two L-shaped protection plates 9 are continuously close to each other, one end part of the connection wire body 27 continuously enters the receiving hole 28, when the two L-shaped protection plates 9 are far away from each other, the connection wire body 27 continuously extends out of the receiving hole 28, another end connection of connecting line body 27 has connecting block 29, and connecting block 29 and a class L shape guard plate 9's a lateral wall fixed connection are passed through to connecting block 27's a tip, and connecting block 29 and the structure looks adaptation of accomodating hole 28, when two class L shape guard plates 9 are close to each other or keep away from, the effect of auxiliary protection can be said to joint lug 25 and spill joint piece 26.

In the invention, firstly, the bottom plate 3 is arranged at a position appointed by the wall by using an expansion screw, the interior of the elastic shrinkage tube 4 is pumped by the miniature air pump 5, so that the air in the elastic shrinkage tube 4 is reduced, the air pressure is reduced, the interior of the elastic shrinkage tube 4 presents a negative pressure environment, under the action of the external atmospheric pressure, the top plate 2 can be continuously close to the position of the bottom plate 3, a reverse acting force is equivalently given to the top plate 2, thereby the top plate 2 is fixed on the bottom plate 3, the integral structure is convenient to be arranged, the air is input into the elastic shrinkage tube 4 by the miniature air pump 5, the pressure in the elastic shrinkage tube 4 is continuously increased until the pressure is communicated with the external atmospheric pressure, at the moment, the top plate 2 is far away from the position farthest from the bottom plate 3, and when the top plate 2 is close to or far away from the position of the bottom plate 3, the connecting transverse plate 6 can move outside the reinforcing connecting rod 7, thereby supporting the top plate 2 by the reinforcing link 7;

when the integral structure is installed at a designated position, two L-shaped protection plates 9 in the protection mechanism are located at close positions, and a user needs to use the alarm body 1, firstly, the pressing plate 16 is pressed, the pressing plate 16 descends to drive the straight-tooth plate 18 to move downwards, so that the straight-tooth gear 19 meshed with the straight-tooth plate 18 rotates, and further the driving screw rod 20 rotates, after the driving screw rod 20 rotates, the moving block 12 matched with the driving screw rod 20 moves inside the annular frame 14, and meanwhile, the sliding block 13 moves outside the linear sliding rail 11, so that the L-shaped protection plates 9 move above the base 10, because the two L-shaped protection plates 9 are symmetrically arranged, the two L-shaped protection plates 9 can be far away, so that the alarm body 1 shielded by the L-shaped protection plates 9 is exposed, and the user can conveniently use the alarm body 1, continuous pressing is needed in the process of pressing the pressing plate 16, and a continuous force is given to the pressing plate 16 until the two L-shaped protection plates 9 are far away to the farthest position;

after alarm body 1 uses, the user only need let go of press plate 16, press plate 16 can constantly rise under damping telescopic link 17's effect, and because damping telescopic link 17 has the damping characteristic, press plate 16 can slowly rise, at this moment, straight-tooth plate 18 moves up, drive the 19 antiport of meshed straight gear, thereby drive lead screw 20 antiport, further make movable block 12 constantly be close to, finally make two class L shape guard plates 9 be close to each other, and shelter from alarm body 1.

The points to be finally explained are: first, in the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" should be understood broadly, and may be a mechanical connection or an electrical connection, or a communication between two elements, and may be a direct connection, and "upper," "lower," "left," and "right" are only used to indicate a relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship may be changed;

secondly, the method comprises the following steps: in the drawings of the disclosed embodiments of the invention, only the structures related to the disclosed embodiments are referred to, other structures can refer to common designs, and the same embodiment and different embodiments of the invention can be combined with each other without conflict;

and finally: the above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. The utility model provides a fire alarm easy to assemble, includes alarm body (1), its characterized in that, alarm body (1) below is provided with roof (2), bottom plate (3) are installed to the below of roof (2), be connected with elastic shrinkage pipe (4) between roof (2) and bottom plate (3), one side of elastic shrinkage pipe (4) communicates with each other and is connected with miniature aspiration pump (5), the both sides wall of roof (2) all is connected with and connects diaphragm (6), the roof of bottom plate (3) is located four corners position department and all installs reinforcing connecting rod (7), a tip of reinforcing connecting rod (7) passes and connects diaphragm (6) and extends to and be connected diaphragm (6) top and be connected with stopper (8), install protection machanism between alarm body (1) and roof (2).

2. A fire alarm convenient to install according to claim 1, the protection mechanism comprises L-shaped protection plates (9) positioned at two sides of the alarm body (1), a base (10) is arranged below the similar L-shaped protection plate (9), linear slide rails (11) are arranged on two sides of the top wall of the base (10), one end part of the L-shaped protection plate (9) is connected with a moving block (12), the other end part of the L-shaped protection plate (9) is connected with a sliding block (13), the moving block (12) and the sliding block (13) are matched with the linear slide rail (11), an annular frame (14) is arranged between the base (10) and the top plate (2), a driving assembly is installed on one side of the annular frame (14), and an auxiliary protection mechanism is installed between the L-shaped protection plates (9).

3. The fire alarm convenient to install as claimed in claim 2, wherein the driving assembly comprises a driving box (15) arranged on one side of an annular frame (14), a pressing plate (16) is arranged above the driving box (15), a damping telescopic rod (17) is arranged inside the driving box (15), a straight toothed plate (18) is arranged on one side of the damping telescopic rod (17), a through groove is formed inside the straight toothed plate (18), a lower fixing rod (21) is arranged inside the through groove, an upper fixing rod (22) is connected to the top end of the straight toothed plate (18), a straight gear (19) is arranged on one side of the straight toothed plate (18) in a matching manner, and a driving screw rod (20) is connected to one side wall of the straight gear (19).

4. The fire alarm convenient to install as claimed in claim 3, wherein one end of the damping telescopic rod (17) is fixedly connected with the top wall of the top plate (2), the output end piston rod of the damping telescopic rod (17) penetrates through the inner top wall of the driving box body (15) and extends above the driving box body (15) to be fixedly connected with one side wall of the pressing plate (16), one end of the upper fixing rod (22) penetrates through the inner wall of the driving box body (15) and extends above the driving box body (15) to be fixedly connected with one side wall of the pressing plate (16), and one end of the lower fixing rod (21) is fixedly connected with the top wall of the top plate (2).

5. The fire alarm convenient to mount as claimed in claim 3, wherein the spur gear (19) is located inside the driving box body (15), the driving screw rod (20) is located inside the annular frame (14), and one end of the driving screw rod (20) sequentially penetrates through the two moving blocks (12) and extends to the position of the inner side wall of the annular frame (14) to be rotatably connected with the annular frame (14).

6. The fire alarm convenient to mount as claimed in claim 2, wherein a threaded hole (23) is formed in the bottom of the moving block (12), threads inside the threaded hole (23) are matched with the structure of the driving screw rod (20), a square through hole (24) is formed in the upper portion of the moving block (12), the square through hole (24) is matched with the structure of the linear sliding rail (11), the vertical cross-sectional shape of the sliding block (13) is arranged to be a shape of '21274', and the sliding block (13) is matched with the structure of the linear sliding rail (11).

7. The fire alarm convenient to install as claimed in claim 2, wherein the auxiliary protection mechanism comprises two sets of auxiliary protection assemblies, each auxiliary protection assembly comprises a clamping convex block (25) and a concave clamping block (26) which are respectively connected with two L-shaped protection plates (9), the clamping convex block (25) is matched with the concave clamping block (26) in structure, a connection wire body (27) is arranged on one side of the clamping convex block (25), the two end portions of the L-shaped protection plates (9) are provided with accommodating holes (28), one end portion of the connection wire body (27) is located inside the accommodating holes (28), and the other end portion of the connection wire body (27) is connected with a connecting block (29).

8. A fire alarm convenient to install as claimed in claim 7, wherein one end of the connecting line body (27) is fixedly connected with one side wall of the L-like protection plate (9) through a connecting block (29), and the connecting block (29) is matched with the structure of the receiving hole (28).

9. A fire alarm convenient to mount according to claim 2, wherein a sliding hole (30) is formed in the surface of the base (10) below the linear guideway (11) close to one side of the driving screw rod (20), and the moving block (12) is arranged in the sliding hole (30).