Natural gas leak alarm device

Abstract

The present application relates to the field of alarm devices, and in particular to a natural gas leak alarm device, which includes a box body and a fan. The box body includes a storage cavity, a battery slot, a first through hole, and a second through hole. A circuit board is provided in the storage cavity, and a first positive contact terminal and a first negative contact terminal are provided in the battery slot. The battery slot is divided into a first slot body, a second slot body, and a third slot body. Two first fixing plates are provided at the positive pole of the first slot body, two second fixing plates are provided at the positive pole of the second slot body, and two third fixing plates are provided at the positive pole of the third slot body. The fan includes a fixing rib, and an assembly channel is provided in the fixing rib. In the natural gas leak alarm device provided in the present application, by respectively providing the first fixing plate, the second fixing plate, and the third fixing plate in the first slot body, the second slot body, and the third slot body, the problem that the traditional natural gas leak alarm device is easily installed upside down when installing the battery is solved.

Description

Technical Field

[0001] The present application relates to the field of alarm devices, and in particular to a natural gas leakage alarm device. Background Art

[0002] With the development of science and technology, the use of natural gas is becoming more and more widespread. Natural gas is clean and has been widely used by families in my country. It is inseparable from our lives. However, natural gas leaks may occur in life. Natural gas leaks will increase the concentration of natural gas in the room. When its concentration rises to a certain level, it is very easy to explode, causing personal injury and property loss. In order to avoid this situation, most families have installed alarms to detect natural gas leaks.

[0003] The battery compartment of a conventional natural gas leak alarm device does not have a fool-proof design, which makes it easy for users to install the battery upside down. Utility Model Content

[0004] The present application provides a natural gas leakage alarm device to solve the problem that the battery slot of the traditional natural gas leakage alarm device has no fool-proof design, which causes the user to easily install the battery upside down.

[0005] In order to solve the above technical problems, a technical solution adopted by the present application is to provide a natural gas leakage alarm device, which includes:

[0006] A box body, comprising a storage cavity, a battery slot, a first through hole and a second through hole, wherein a circuit main board is arranged in the storage cavity, a first positive contact terminal and a first negative contact terminal are arranged in the battery slot, the first through hole and the second through hole connect the battery slot with the storage cavity, the first positive contact terminal and the first negative contact terminal extend into the storage cavity through the first through hole and the second through hole, and the circuit main board is fixedly connected to the first positive contact terminal and the first negative contact terminal;

[0007] The battery tank is divided into a first tank body, a second tank body and a third tank body, two first fixing plates are provided at the positive electrode of the first tank body, two second fixing plates are provided at the positive electrode of the second tank body, and two third fixing plates are provided at the positive electrode of the third tank body, and the spacing distance between the two first fixing plates, the spacing distance between the two second fixing plates and the spacing distance between the two third fixing plates all match the positive pole protrusion of the battery;

[0008] The fan comprises a fixing rib, wherein an assembly channel is arranged in the fixing rib.

[0009] Optionally, the first positive contact terminal and the first negative contact terminal are both U-shaped at one end close to the circuit main board.

[0010] Optionally, the natural gas leakage alarm device further includes a battery cover, the box body is further provided with a fixing buckle, the battery cover is provided with a snap buckle, and the fixing buckle matches the snap buckle.

[0011] Optionally, the battery cover is further provided with a fixing portion, and the box body is further provided with a threaded hole matching the fixing portion.

[0012] Optionally, the natural gas leakage alarm device further includes an interface component, and the interface component includes a contact pin, a first fixing sleeve, and a second fixing sleeve.

[0013] Optionally, a fixing column is provided on the first fixing sleeve, and the fixing column is fixedly assembled with the circuit main board.

[0014] Optionally, a mounting groove is provided on the second fixing sleeve, and a shape of the mounting groove matches a shape of the first fixing sleeve.

[0015] Optionally, the first fixing sleeve is further provided with a first convex buckle, and the second fixing sleeve is further provided with a buckle groove, and the first convex buckle matches the buckle groove to facilitate fixed assembly of the first fixing sleeve and the second fixing sleeve.

[0016] Optionally, the natural gas leak alarm device further includes a communication harness, which includes a harness connector, a first harness and a second harness, and the first harness and the second harness are both electrically connected to the harness connector.

[0017] The beneficial effect of the present application is that in the natural gas leakage alarm device provided in the present application, by respectively arranging the first fixing plate, the second fixing plate and the third fixing plate in the first trough body, the second trough body and the third trough body, the problem that the traditional natural gas leakage alarm device is easily installed upside down when installing the battery is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0019] Figure 1 is an exploded diagram of a natural gas leak alarm device provided in an embodiment of the present application;

[0020] Figure 2 It is a three-dimensional structural schematic diagram of the box body part of the natural gas leakage alarm device;

[0021] Figure 3It is a three-dimensional structural diagram of the box body part of the natural gas leakage alarm device from another perspective;

[0022] Figure 4 It is a three-dimensional structural schematic diagram of the interface component part of the natural gas leakage alarm device;

[0023] Figure 5 It is a three-dimensional structural schematic diagram of the second fixed sleeve part in the natural gas leakage alarm device;

[0024] Figure 6 It is a three-dimensional structural diagram of the communication harness part of the natural gas leak alarm device;

[0025] Figure 7 It is a three-dimensional structural schematic diagram of the rain cover part of the natural gas leakage alarm device;

[0026] Figure 8 It is a cross-sectional view of the rain shield;

[0027] Fig. 9 It is a three-dimensional structural diagram of the fan part of the natural gas leak alarm device.

[0028] Description of reference numerals: 100, box body; 110, storage cavity; 120, first slot body; 121, first through hole; 122, first fixing plate; 130, second slot body; 131, second fixing plate; 140, third slot body; 141, second through hole; 142, third fixing plate; 150, fixing buckle; 200, cover plate; 300, battery cover; 310, buckle; 320, fixing part; 400, interface assembly; 410, contact pin; 420, first fixing sleeve; 421, fourth through hole; 422, fixing column; 423, first convex buckle; 430, second fixing sleeve; 431, assembly groove; 43 2. Buckle groove; 440. Interface sleeve; 441. First partition plate; 442. Notch; 443. Second partition plate; 444. Third partition plate; 445. Second convex buckle; 500. Communication harness; 510. Harness connector; 520. First harness; 530. Second harness; 531. First adapter; 600. Fan; 610. Fan barrel; 620. Fan blades; 630. Rotating assembly portion; 640. Fixed rib; 650. Assembly channel; 700. Rain cover; 710. Second opening; 720. Third opening; 730. Guide strip; 731. First guide surface; 732. Second guide surface. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0030] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back...), such directional indications are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0031] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0032] like Figures 1 to 9 As shown, the present application provides a natural gas leakage alarm device, which includes a box body 100 and a fan 600.

[0033] The box body 100 includes a storage cavity 110, a battery slot, a first through hole 121 and a second through hole 141. A circuit main board is provided in the storage cavity 110, and a first positive contact terminal and a first negative contact terminal are provided in the battery slot. The first through hole 121 and the second through hole 141 connect the battery slot with the storage cavity 110. The first positive contact terminal and the first negative contact terminal extend into the storage cavity 110 through the first through hole 121 and the second through hole 141, and the circuit main board is fixedly connected to the first positive contact terminal and the first negative contact terminal.

[0034] The battery slot is divided into a first slot body 120, a second slot body 130 and a third slot body 140. Two first fixing plates 122 are provided at the positive pole of the first slot body 120, two second fixing plates 131 are provided at the positive pole of the second slot body 130, and two third fixing plates 142 are provided at the positive pole of the third slot body 140. The spacing distance between the two first fixing plates 122, the spacing distance between the two second fixing plates 131 and the spacing distance between the two third fixing plates 142 all match the positive pole protrusion of the battery.

[0035] The fan 600 includes a fixing rib 640 , in which a mounting channel 650 is provided.

[0036] The natural gas leakage alarm device comprises an alarm box, which comprises a box body 100 , a cover plate 200 and a battery cover 300 .

[0037] The box body 100 is a rectangular container with an opening on one side, the opening being a first opening. A storage cavity 110 is formed in the box body 100. A circuit board is disposed in the storage cavity 110. Various electrical components and sensors are disposed on the circuit board to facilitate analysis of natural gas concentration in the air.

[0038] The side of the box body 100 away from the first opening is the bottom surface, and the middle part of the bottom surface is recessed toward the storage cavity 110 to form a battery slot, which is divided into a first slot body 120, a second slot body 130 and a third slot body 140. In a specific embodiment, the first slot body 120, the second slot body 130 and the third slot body 140 are all matched with the shape of a No. 5 battery. The first slot body 120, the second slot body 130 and the third slot body 140 are arranged side by side in sequence, and the bottoms of the first slot body 120, the second slot body 130 and the third slot body 140 are all marked with a mark indicating the battery placement direction.

[0039] Two first fixing plates 122 are provided at the positive pole of the first trough body 120, two second fixing plates 131 are provided at the positive pole of the second trough body 130, and two third fixing plates 142 are provided at the positive pole of the third trough body 140. The two first fixing plates 122 are located in the same plane, the two second fixing plates 131 are located in the same plane, and the two third fixing plates 142 are located in the same plane. The spacing distance between the two first fixing plates 122, the spacing distance between the two second fixing plates 131, and the spacing distance between the two third fixing plates 142 all match the diameter of the positive pole boss of the battery, so that the battery can only be placed in the battery slot in the correct direction.

[0040] The positive electrode of the first tank body 120, the negative electrode of the second tank body 130, and the positive electrode of the third tank body 140 are located on the same side of the battery tank, which is the first electrode side. The negative electrode of the first tank body 120, the positive electrode of the second tank body 130, and the negative electrode of the third tank body 140 are located on the same side of the battery tank, which is the second electrode side. A first negative electrode contact terminal is provided at one end of the first tank body 120 close to the second electrode side. The first negative electrode contact terminal is formed by winding a wire. The first negative electrode contact terminal is used to electrically connect to the negative electrode of the battery in the first tank body 120. A first through hole 121 is further provided on one side of the battery slot near the first negative contact terminal. The first through hole 121 penetrates the first slot body 120 to connect the battery slot with the storage cavity 110. One end of the first negative contact terminal extends into the storage cavity 110 through the first through hole 121, and one end of the first negative contact terminal extending into the storage cavity 110 penetrates the circuit main board. One end of the first negative contact terminal extending into the storage cavity 110 is U-shaped, and the U-shaped end of the first negative contact terminal is welded to the circuit main board by welding.

[0041] A first positive contact terminal is provided at one end of the third slot body 140 close to the first electrode side, and the first positive contact terminal is formed by winding an iron wire. A second through hole 141 is also provided at a position of the battery slot close to the first positive contact terminal. The second through hole 141 penetrates the third slot body 140, so that the battery slot is connected to the storage cavity 110. One end of the first positive contact terminal extends into the storage cavity 110 through the second through hole 141, and one end of the first positive contact terminal extending into the storage cavity 110 penetrates the circuit main board. The portion of the first positive contact terminal penetrating the circuit main board is U-shaped, and the U-shaped portion of the first positive contact terminal is welded to the circuit main board through a welding process.

[0042] To summarize, by welding the circuit main board with the first negative contact terminal and the first positive contact terminal, the electrical connection between the battery slot and the circuit main board is achieved, and the fixation of the circuit main board is also achieved. Compared with the traditional method of fixing the circuit main board with screws, the fixing method of the present application is more stable and reliable and will not loosen.

[0043] Three fixing buckles 150 are also provided on the bottom surface of the box body 100 near the first electrode side. The fixing buckles 150 are integrally formed with the box body 100. The three fixing buckles 150 are arranged at equal intervals. The positions of the three fixing buckles 150 correspond one by one to the positions of the first slot body 120, the second slot body 130 and the third slot body 140 respectively.

[0044] The battery cover 300 is roughly rectangular, and the shape of the battery cover 300 matches the shape of the battery slot. Three clips 310 are provided on the battery cover 300. The three clips 310 are integrally formed with the battery cover 300 and the three clips 310 are arranged at equal intervals. The three clips 310 correspond one by one to the three fixing buckles 150. In the actual assembly process, the three clips 310 are embedded in the three fixing buckles 150 to position the battery cover 300.

[0045] Two fixing parts 320 are further provided on the side of the battery cover 300 away from the buckle 310. The fixing parts 320 are integrally formed with the battery cover 300. The two fixing parts 320 are symmetrically arranged about the battery cover 300 plate 200. A third through hole is provided on the fixing part 320. The third through hole passes through the fixing part 320. A threaded hole is also provided on the bottom surface of the box body 100. There are two threaded holes. The two threaded holes are symmetrical about the battery slot, and the two third through holes correspond to the two threaded holes one by one.

[0046] In summary, the screws are used to fix the battery cover 300 and the box body 100 through the third through hole and the threaded hole to seal the battery slot. The fixation of the screws prevents the battery cover 300 from being opened casually, thereby improving the safety of the natural gas leak alarm device.

[0047] The shape of the cover plate 200 matches the shape of the first opening of the box body 100 , and the cover plate 200 is fixedly assembled with the box body 100 so as to seal the storage cavity 110 .

[0048] An interface assembly 400 is disposed at a corner of the circuit main board. The interface assembly 400 includes a contact pin 410 , a first fixing sleeve 420 and a second fixing sleeve 430 .

[0049] There are a plurality of contact pins 410, which are L-shaped, arranged in two rows and fixed to the circuit main board by welding, and the contact pins 410 are electrically connected to the circuit main board. The first fixing sleeve 420 is provided with a plurality of fourth through holes 421, which penetrate the first fixing sleeve 420, and the shape of the fourth through holes 421 matches the shape of the contact pins 410, and the fourth through holes 421 correspond to the contact pins 410 one by one. The first fixing sleeve 420 is sleeved on the contact pins 410 through the fourth through holes 421. Two fixing columns 422 are further provided on one side of the first fixing sleeve 420 close to the circuit main board, and the two fixing columns 422 penetrate the circuit main board to fix and assemble the first fixing sleeve 420 with the circuit main board. Two first convex buckles 423 are further provided on both sides of the first fixing sleeve 420, and the two first convex buckles 423 are integrally formed with the first fixing sleeve 420 and the two first convex buckles 423 are symmetrical about the first fixing sleeve 420.

[0050] The second fixing sleeve 430 is provided with an assembly groove 431, and the shape of the assembly groove 431 matches the shape of the first fixing sleeve 420. In the actual assembly process, the first fixing sleeve 420 is embedded in the assembly groove 431. A plurality of fifth through holes are provided in the assembly groove 431. The fifth through holes penetrate the second fixing sleeve 430. The shape of the fifth through holes matches the shape of the contact pin 410. The fifth through holes correspond to the contact pin 410 one by one. The second fixing sleeve 430 is sleeved on the contact pin 410 through the fifth through holes. The second fixing sleeve 430 also includes a buckle groove 432. The buckle groove 432 is provided with two buckle grooves 432. The two buckle grooves 432 are symmetrically arranged on both sides of the second fixing sleeve 430. The shape of the buckle groove 432 matches the shape of the first convex buckle 423. When the second fixing sleeve 430 is sleeved on the contact pin 410 and the first fixing sleeve 420 is embedded in the assembly groove 431, the first convex buckle 423 is buckled with the buckle groove 432 to fix and assemble the first fixing sleeve 420 and the second fixing sleeve 430.

[0051] An interface sleeve 440 is also provided on the side of the second fixed sleeve 430 away from the first fixed sleeve 420. The interface sleeve 440 encloses a space that is roughly in the shape of a rectangular parallelepiped. A first partition plate 441 is provided in the interface sleeve 440. The first partition plate 441 divides the space in the interface sleeve 440 into a first space and a second space. A plurality of notches 442 are provided on the first partition plate 441. The notches 442 are rectangular. The plurality of notches 442 are evenly spaced on the first partition plate 441. A plurality of second partition plates 443 are also provided in the interface sleeve 440. The second partition plates 443 are located in the first space. The second partition plates 443 are rectangular. The second partition plates 443 and the first partition plates 441 are perpendicular to each other. The plurality of second partition plates 443 are evenly spaced, and the plurality of second partition plates 443 separate the plurality of notches 442 one by one.

[0052] A third partition plate 444 is further provided in the second space. The shape of the third partition plate 444 is the same as that of the second partition plate 443. The third partition plate 444 and the first partition plate 441 are perpendicular to each other. The third partition plate 444 divides the second space into two parts.

[0053] A second convex buckle 445 is further provided on one side of the interface sleeve 440 close to the second space, and the second convex buckle 445 is integrally formed with the interface sleeve 440 .

[0054] The natural gas leakage alarm device further includes a communication harness 500 , which includes a harness connector 510 , a first harness 520 , and a second harness 530 . The harness connector 510 is used to be electrically connected to the interface assembly 400 to establish signal communication.

[0055] The wiring harness connector 510 includes a plurality of contact pin plugs, which correspond one-to-one to a plurality of contact pins 410 . When the wiring harness connector 510 is inserted into the interface sleeve 440 , the contact pins 410 will be inserted into the contact pin plugs to achieve electrical connection between the interface assembly 400 and the wiring harness connector 510 .

[0056] A claw is also provided on one side of the wiring harness connector 510 close to the interface sleeve 440, and the shape of the claw matches the shape of the second protrusion 445. When the wiring harness connector 510 is inserted into the interface sleeve 440, the claw engages with the second protrusion 445 so that the wiring harness connector 510 can be stably connected to the interface sleeve 440.

[0057] One end of the first wiring harness 520 is integrally formed with the wiring harness connector 510, and the other end is connected to an external valve. When the natural gas leakage alarm device detects that the natural gas content in the air reaches a preset value, the natural gas leakage alarm device will control the external valve through the first wiring harness 520 to close the natural gas supply pipeline.

[0058] One end of the second wiring harness 530 is integrally formed with the wiring harness connector 510, and the other end is provided with a first adapter 531. The natural gas leakage alarm device also includes a fan 600 and a third wiring harness. One end of the third wiring harness is electrically connected to the fan 600, and the other end is provided with a second adapter. The first adapter 531 matches the second adapter pressure head. The first adapter 531 and the second adapter are threadedly assembled so that the first adapter 531 is electrically connected to the second adapter. When the natural gas leakage alarm device detects that the natural gas content in the air reaches a preset value, the natural gas leakage alarm device can control the fan 600 to work through the second wiring harness 530 and the third wiring harness to discharge the indoor natural gas to the outdoors.

[0059] In summary, the natural gas leakage alarm device controls the operation of the valve and the fan 600 respectively through the first wiring harness 520 and the second wiring harness 530, thereby achieving a double protection effect.

[0060] The fan 600 includes a fan barrel 610, fan blades 620, a rotating assembly part 630 and a fixed rib 640. The rotating assembly part 630 is arranged in the middle of the fan barrel 610. The rotating assembly part 630 is used for rotationally assembling with the fan blades 620. Three fixed ribs 640 are provided. The three fixed ribs 640 are evenly distributed around the rotating assembly part 630. One end of the fixed rib 640 is fixedly connected to the fan barrel 610, and the other end is fixedly connected to the rotating assembly part 630. The fixed rib 640 is used to fix the rotating assembly part 630.

[0061] The fan 600 is also provided with an assembly channel 650, which passes through the fan barrel 610 and one of the fixed ribs 640. The shape of the assembly channel 650 matches the shape of the third wiring harness. The end of the third wiring harness away from the second wiring harness 530 is electrically connected to the fan 600 through the assembly channel 650. The assembly channel 650 is arranged in the fixed rib 640, and the third wiring harness is electrically connected to the fan 600 through the assembly channel 650. This can avoid exposing the third wiring harness to the outside, which may cause the risk of damage to the third wiring harness.

[0062] The natural gas leakage alarm device further comprises a rain cover 700, one end of the rain cover 700 is connected to the fan 600, and the other end is connected to the outside.

[0063] The rain cover 700 is L-shaped as a whole. The rain cover 700 passes through the wall and is fixedly assembled with the wall. The two ends of the rain cover 700 are divided into a second opening 710 and a third opening 720. The second opening 710 is located indoors, and the third opening 720 is located outdoors. The shape of the second opening 710 matches the shape of the fan 600. The fan 600 is fixedly assembled at the second opening 710 of the rain cover 700. When the fan 600 starts working, the fan 600 will discharge the indoor air to the outdoors through the rain cover 700.

[0064] In actual working process, the direction of the third opening 720 is vertically downward, and a plurality of guide strips 730 are further provided in the rain cover 700. The plurality of guide strips 730 are distributed in a step-like manner, the guide strips 730 are arranged horizontally, and the guide strips 730 are fixedly assembled with the inside of the rain cover 700. The guide strips 730 include a first guide surface 731 and a second guide surface 732. The first guide surface 731 is a plane inclined from a vertical plane toward a direction of the second opening 710, and the second guide surface 732 is connected to a side of the first guide surface 731 close to the ground, and the second guide surface 732 is a plane inclined from a vertical plane toward a direction away from the second opening 710.

[0065] In summary, the setting of the guide strip 730 enables the air entering the rain cover 700 from the second opening 710 to be discharged from the third opening 720 under the guidance of the guide strip 730, thereby effectively preventing the gas from flowing back.

[0066] Several ventilation holes are provided on the three side walls of the box body 100. The ventilation holes penetrate the side walls of the box body 100. Air enters the storage cavity 110 through the ventilation holes to detect the air. During the actual installation process, the side wall without ventilation holes faces upward to prevent dust from entering the storage cavity 110, thereby further enhancing the safety of the natural gas leak alarm device.

[0067] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. For those skilled in the art, various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application. Therefore, all equivalent changes made according to the structure, shape and principle of the present application should be included in the protection scope of the present application.

Claims

1. A natural gas leak alarm device, characterized in that: include: A box body (100) comprises a storage cavity (110), a battery slot, a first through hole (121) and a second through hole (141); a circuit main board is provided in the storage cavity (110); a first positive contact terminal and a first negative contact terminal are provided in the battery slot; the first through hole (121) and the second through hole (141) connect the battery slot with the storage cavity (110); the first positive contact terminal and the first negative contact terminal extend into the storage cavity (110) through the first through hole (121) and the second through hole (141); and the circuit main board is fixedly connected to the first positive contact terminal and the first negative contact terminal; The battery container is divided into a first container body (120), a second container body (130) and a third container body (140); two first fixing plates (122) are provided at the positive electrode of the first container body (120); two second fixing plates (131) are provided at the positive electrode of the second container body (130); and two third fixing plates (142) are provided at the positive electrode of the third container body (140); the spacing distance between the two first fixing plates (122), the spacing distance between the two second fixing plates (131) and the spacing distance between the two third fixing plates (142) all match the positive electrode protrusion of the battery; The fan (600) comprises a fixing rib (640), wherein an assembly channel (650) is provided in the fixing rib (640).

2. The natural gas leak alarm device according to claim 1, characterized in that: The first positive contact terminal and the first negative contact terminal are both U-shaped at one end close to the circuit main board.

3. The natural gas leakage alarm device according to claim 1, characterized in that: The natural gas leakage alarm device further comprises a battery cover (300), the box body (100) is further provided with a fixing buckle (150), the battery cover (300) is provided with a snap buckle (310), and the fixing buckle (150) matches the snap buckle (310).

4. The natural gas leakage alarm device according to claim 3, characterized in that: The battery cover (300) is also provided with a fixing portion (320), and the box body (100) is also provided with a threaded hole matching the fixing portion (320).

5. The natural gas leakage alarm device according to claim 1, characterized in that: The natural gas leakage alarm device further comprises an interface component (400), wherein the interface component (400) comprises a contact pin (410), a first fixing sleeve (420) and a second fixing sleeve (430).

6. The natural gas leakage alarm device according to claim 5, characterized in that: The first fixing sleeve (420) is provided with a fixing column (422), and the fixing column (422) is fixedly assembled with the circuit main board.

7. The natural gas leakage alarm device according to claim 6, characterized in that: The second fixing sleeve (430) is provided with a mounting groove (431), and the shape of the mounting groove (431) matches the shape of the first fixing sleeve (420).

8. The natural gas leakage alarm device according to claim 7, characterized in that: The first fixing sleeve (420) is also provided with a first convex buckle (423), and the second fixing sleeve (430) is also provided with a buckle groove (432), and the first convex buckle (423) matches the buckle groove (432) to facilitate the fixed assembly of the first fixing sleeve (420) and the second fixing sleeve (430).

9. The natural gas leakage alarm device according to claim 1, characterized in that: The natural gas leakage alarm device further comprises a communication harness (500), wherein the communication harness (500) comprises a harness connector (510), a first harness (520) and a second harness (530), wherein the first harness (520) and the second harness (530) are both electrically connected to the harness connector (510).

Images