Fire alarm convenient to maintain

Abstract

The utility model discloses a fire alarm convenient for maintenance, which comprises a substrate, the bottom wall of the substrate is provided with a placement groove, a clamping seat is arranged in the placement groove, the bottom wall of the clamping seat is provided with an alarm body, and two sides of the clamping seat are provided with a plurality of clamping grooves at equal intervals. Two connecting plates are slidably connected to the positions, located on the two sides of the clamping base, in the base plate in a limiting mode, a plurality of clamping blocks connected with the clamping grooves in a limiting and clamping mode are fixedly arranged on the opposite faces of the two connecting plates at equal intervals, racks are fixedly connected to one ends of the two connecting plates, and a gear is jointly connected between the two racks in an engaged mode; and a connecting shaft fixedly penetrates through the center position of the gear, one end of the connecting shaft rotationally penetrates through the surface of the base plate in a limited mode and then is connected with a worm wheel, a worm connected with the worm wheel in a meshed mode is arranged on one side of the worm wheel, through the arrangement of the structure, limiting and fixing of the clamping base can be rapidly and stably achieved, and the practicability of the device is improved.

Description

Technical Field

[0001] The utility model relates to the field of fire alarms, in particular to a fire alarm convenient for maintenance. Background Art

[0002] Fire alarms are used for sound alarms and flash alarms at the accident site, especially suitable for places with low visibility or smoke at the accident site, and are applied in all fire alarm control systems, security monitoring alarm systems and other alarm systems. However, there are certain problems in the existing devices during use and continuous improvement is still needed;

[0003] For example, a fire alarm convenient for maintenance disclosed in the utility model with the authorization announcement number CN220855813U includes a substrate and an inlaid panel. A placement groove and a plurality of card slots are opened on the lower side of the substrate. A movable plate is slidably fitted in the substrate. One side of the movable plate is provided with a pressing rod, and the other side of the movable plate is provided with two sliding plates. A plurality of connecting blocks are respectively arranged on the opposite inner sides of the two sliding plates. One side of the connecting block is provided with an inserting rod. The lower side of the inlaid panel is provided with an alarm body. A plurality of clamping blocks are respectively arranged on the opposite sides of the inlaid panel. The clamping blocks are slidably fitted in the card slots. A limiting groove and a guiding groove are opened on one side of the clamping block. One end of the inserting rod is elastically fitted in the limiting groove. The guiding groove facilitates the displacement of the inserting rod when the clamping block is inserted into the card slot, so as to facilitate the direct installation of the inlaid panel. The elastic sliding of the inserting rod in cooperation with the limiting groove facilitates the automatic insertion of the inserting rod into the limiting groove to limit the clamping block.

[0004] When the device is in use, the spring rebounds to push the inserting rod to quickly reset, and at the same time keeps the inserting rod in a state of limiting the clamping block. However, the spring has a certain deformation ability and is prone to deformation during long-term use, which further leads to the weakening of the spring elasticity, thus affecting the stability of the inserting rod to limit and fix the clamping block and the stability of limiting and fixing the inlaid panel and the alarm body. Summary of the Utility Model

[0005] In order to overcome the deficiencies of the prior art, the utility model provides a fire alarm convenient for maintenance, which can solve the technical problem that the spring has a certain deformation ability and is prone to deformation during long-term use, which further leads to the weakening of the spring elasticity, thus affecting the stability of the inserting rod to limit and fix the clamping block and the stability of limiting and fixing the inlaid panel and the alarm body.

[0006] To solve the above technical problems, the present utility model provides the following technical solutions: A fire alarm convenient for maintenance, including a substrate. A placement groove is provided on the bottom wall of the substrate. A card seat is arranged in the placement groove. An alarm body is arranged on the bottom wall of the card seat. A number of card slots are equally spaced and opened on both sides of the card seat. Two connecting plates are connected in a limited sliding manner within the substrate and on both sides of the card seat. A number of blocks that are limitedly engaged and connected with the card slots are fixedly arranged at equal intervals on the opposite surfaces of the two connecting plates. A rack is fixedly connected to one end of each of the two connecting plates. A gear is commonly engaged and connected between the two racks. A connecting shaft is fixedly penetrated through the center position of the gear. One end of the connecting shaft is limitedly rotated and penetrated through the surface of the substrate and then connected to a worm gear. A worm is arranged on one side of the worm gear and is engaged and connected with the worm gear.

[0007] As a preferred technical solution of the present utility model, a rotating shaft is fixedly penetrated through the center position of the worm. Both ends of the rotating shaft are limitedly rotated and connected to the surface of the substrate through a limit seat. One end of the rotating shaft penetrates through the surface of the limit seat and then is connected to an adjusting knob.

[0008] As a preferred technical solution of the present utility model, the surface of the adjusting knob is provided with rough lines that increase the friction between the hand and the adjusting knob.

[0009] As a preferred technical solution of the present utility model, both of the two racks are connected in a limited sliding manner within the substrate.

[0010] As a preferred technical solution of the present utility model, the bottom end of the connecting shaft is limitedly rotated and connected to the inner bottom wall of the substrate.

[0011] As a preferred technical solution of the present utility model, a mounting seat is fixedly arranged at each of the four corners of the substrate. An expansion bolt is threadedly penetrated through the surface of each of the four mounting seats.

[0012] Compared with the prior art, the beneficial effects that the present utility model can achieve are:

[0013] Through the meshing connection between the worm gear and the worm, the rotational adjustment of the connecting shaft is realized. The rotationally adjusted connecting shaft drives the gear to rotate and adjust. Through the meshing connection between the rotationally adjusted gear and the two racks, the two connecting plates drive the blocks arranged on the connecting plates to respectively approach and insert into the card slots opened on both sides of the card seat, thereby completing the limit fixation of the card seat. The setting of this structure can quickly and stably achieve the limit fixation of the card seat and improve the practicability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic perspective structure diagram of the first perspective of the present utility model;

[0015] Figure 2Schematic diagram of the partial disassembled three-dimensional structure of the present utility model;

[0016] Figure 3 Schematic diagram of the partial sectional three-dimensional structure of the present utility model;

[0017] Figure 4 Schematic diagram of the three-dimensional structure of the second perspective of the present utility model;

[0018] Wherein: 1. Substrate; 2. Placing groove; 3. Card holder; 4. Alarm body; 5. Card slot; 6. Connecting plate; 7. Card block; 8. Rack; 9. Gear; 10. Connecting shaft; 11. Worm gear; 12. Worm; 13. Rotating shaft; 14. Limiting seat; 15. Adjusting knob; 16. Mounting seat; 17. Expansion bolt. Specific embodiments

[0019] In order to make the technical means, creative features, achieved purposes and functions realized by the present utility model easy to understand, the present utility model will be further described below in conjunction with specific embodiments. However, the following embodiments are only the preferred embodiments of the present utility model and not all of them. Based on the embodiments in the embodiments, other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the present utility model.

[0020] Embodiment

[0021] Please refer to Figures 1-4 As shown, the present utility model provides a fire alarm convenient for maintenance. A placing groove 2 is opened on the bottom wall of the substrate 1, then a card holder 3 is arranged in the placing groove 2, then an alarm body 4 is arranged on the bottom wall of the card holder 3, and a plurality of card slots 5 are equally spaced on both sides of the card holder 3. And two connecting plates 6 are connected in a limited sliding manner inside the substrate 1 and on both sides of the card holder 3. Then, a plurality of card blocks 7 that are limitedly engaged with the card slots 5 are fixedly arranged at equal intervals on the opposite surfaces of the two connecting plates 6. At the same time, racks 8 are fixedly connected to one ends of the two connecting plates 6. Then, a gear 9 is meshed and connected between the two racks 8. And a connecting shaft 10 is fixedly penetrated through the center position of the gear 9. One end of the connecting shaft 10 is limitedly rotated and penetrated through the surface of the substrate 1 and then connected to a worm gear 11. Then, a worm 12 meshed with the worm gear 11 is arranged on one side of the worm gear 11. The rotation of the worm gear 11 can be adjusted by the arrangement of the worm 12;

[0022] When installing and fixing the card holder 3, first insert the card holder 3 into the placement groove 2 opened on the surface of the substrate 1. Then, by adjusting the meshing of the rotating worm 12 and the worm wheel 11, the connecting shaft 10 is rotationally adjusted. Then, the rotating connecting shaft 10 drives the gear 9 to rotate and adjust. Through the meshing connection between the rotating gear 9 and the two racks 8, the two connecting plates 6 drive the clamping blocks 7 provided on the connecting plates 6 to approach and insert into the clamping grooves 5 opened on both sides of the card holder 3 respectively, thus completing the limit fixation of the card holder 3. The setting of this structure can quickly and stably realize the limit fixation of the card holder 3, improving the practicability of the device;

[0023] As a further implementation manner of this embodiment, as Figures 1-4 shown, a rotating shaft 13 is fixedly penetrated through the center position of the worm 12. Then, both ends of the rotating shaft 13 are rotationally connected to the surface of the substrate 1 through a limit seat 14. And one end of the rotating shaft 13 penetrates through the surface of the limit seat 14 and is connected with an adjustment knob 15. The surface of the adjustment knob 15 is provided with rough lines. Through the setting of the rough lines, the friction between the hand and the adjustment knob 15 can be increased, so as to facilitate the rotational adjustment of the rotating shaft 13 through the adjustment knob 15. Then, a mounting seat 16 is fixedly arranged at each of the four corners of the substrate 1. Finally, an expansion bolt 17 is threadedly penetrated through the surface of each of the four mounting seats 16. The cooperation between the expansion bolt 17 and the mounting seat 16 is used for the limit fixation and installation of the substrate 1;

[0024] Specific working principle:

[0025] When the device is installed and used, first, through the cooperation between the mounting seat 16 and the expansion bolt 17, the substrate 1 is fixedly installed at a suitable position. Then, when installing the card holder 3 and the alarm body 4 provided on the card holder 3, first insert the card holder 3 into the placement groove 2 opened on the surface of the substrate 1. Then, adjust and rotate the rotating shaft 13 and the worm 12 through the adjustment knob 15. Then, by adjusting the meshing of the rotating worm 12 and the worm wheel 11, the connecting shaft 10 is rotationally adjusted. Then, the rotating connecting shaft 10 drives the gear 9 to rotate and adjust. Through the meshing connection between the rotating gear 9 and the two racks 8, the two connecting plates 6 drive the clamping blocks 7 provided on the connecting plates 6 to approach and insert into the clamping grooves 5 opened on both sides of the card holder 3 respectively, thus completing the limit fixation of the card holder 3. When the alarm body 4 needs to be disassembled and repaired, directly rotate the adjustment knob 15 in the reverse direction, so that the two racks 8 drive the two connecting plates 6 and the clamping blocks 7 provided on the connecting plates 6 to move away from the clamping grooves 5 opened on the side wall of the card holder 3, thus releasing the limit on the card holder 3, and the card holder 3 and the alarm body 4 provided on the card holder 3 can be disassembled for repair work.

[0026] The above has shown and described the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present utility model and are not used to limit the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A fire alarm convenient for maintenance, comprising a base plate (1), characterized in that: The bottom wall of the base plate (1) is provided with a placement groove (2), a card seat (3) is provided in the placement groove (2), an alarm body (4) is provided on the bottom wall of the card seat (3), a plurality of card slots (5) are provided at equal distances on both sides of the card seat (3), two connecting plates (6) are provided in the base plate (1) and are located on both sides of the card seat (3) and are limitedly slidably connected, a plurality of card blocks (7) are fixedly provided at equal distances on opposite surfaces of the two connecting plates (6) and are limitedly engaged with the card slots (5), one end of the two connecting plates (6) is fixedly connected with a rack (8), the two racks (8) are meshedly connected with a gear (9), a connecting shaft (10) is fixedly penetrated at the center position of the gear (9), one end of the connecting shaft (10) is limitedly rotated through the surface of the base plate (1) and is connected to a worm gear (11), and one side of the worm gear (11) is provided with a worm (12) meshed with the worm gear (11).

2. The fire alarm convenient for maintenance according to claim 1, wherein: A rotating shaft (13) is fixedly provided at the center of the worm (12), and both ends of the rotating shaft (13) are connected to the surface of the base plate (1) via a limiting seat (14) for limited rotation, and one end of the rotating shaft (13) passes through the surface of the limiting seat (14) and is connected to an adjusting button (15).

3. The fire alarm device for easy maintenance according to claim 2, characterized in that: The surface of the adjusting button (15) is provided with rough textures for increasing the friction between the hand and the adjusting button (15).

4. The fire alarm device for easy maintenance according to claim 1, characterized in that: The two racks (8) are both connected in a limited sliding manner in the base plate (1).

5. The fire alarm device for easy maintenance according to claim 1, characterized in that: The bottom end of the connecting shaft (10) is connected to the inner bottom wall of the base plate (1) in a limited rotational manner.

6. The fire alarm device convenient for maintenance according to claim 1, wherein: A mounting seat (16) is fixedly provided at each of the four corners of the base plate (1), and an expansion bolt (17) is threadedly inserted through the surface of each of the four mounting seats (16).

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