A gas alarm

Abstract

The application relates to a gas alarm, which comprises an instrument body, a circuit board, a battery module and a display module are arranged in the instrument body, one end of the instrument body is open, the circuit board is fixed at the end of the instrument body far from the opening, a positive electrode connecting sheet and a negative electrode connecting column are arranged on the circuit board, the battery module is slidably connected to the instrument body, the battery module is used for abutting against the positive electrode connecting sheet, the display module covers the end of the battery module far from the circuit board, the negative electrode connecting column is connected with the negative electrode of the battery module through the display module, a buckle for clamping the display module is arranged in the instrument body, and a watchcase is screw-connected to the opening of the instrument body. The application has the effect of conveniently replacing the battery.

Description

Technical Field

[0001] This application relates to a gas alarm device. Background Technology

[0002] Gas monitoring can be applied in the coal mining, petroleum, and medical industries, primarily for monitoring gases in the environment. For example, it can detect flammable, harmful, or toxic gases in the field. Gas alarms can detect the gas depth in real time. When a hazardous gas is detected, the gas alarm promptly transmits a signal to a remote terminal device. This helps safety and environmental protection departments strengthen their monitoring of environmental gases and reduce the occurrence of harmful events such as fires, explosions, and poisoning.

[0003] A related technology discloses a toxic and hazardous gas alarm for industrial sites, comprising an instrument body and an antenna and alarm light mounted on the instrument body. The instrument body contains a circuit board, a gas sensor, a metal heat-conducting ring, an electric heating element, a filter, and a gas chamber cover. The gas sensor is connected to an electrical board. The metal heat-conducting ring has a through hole, and the gas sensor is installed inside the through hole. The electric heating element wraps around the metal heat-conducting ring, and the filter is positioned between the metal heat-conducting ring and the gas chamber cover. The antenna on the instrument body allows for easy movement of the gas alarm and enables it to detect the surrounding environment, providing accurate detection of the environment around workers.

[0004] The circuit board and gas sensor in the above structure both need to be connected to a battery for power supply, and the battery needs to be replaced frequently during use. Summary of the Invention

[0005] To facilitate battery replacement, this application provides a gas alarm.

[0006] This application provides a gas alarm device, which adopts the following technical solution: A gas alarm includes an instrument body containing a circuit board, a battery module, and a display module. One end of the instrument body is open, and the circuit board is fixed to the end of the instrument body away from the opening. The circuit board has a positive electrode connector and a negative electrode connector. The battery module is slidably connected to the instrument body and is positioned to abut against the positive electrode connector. The display module covers the end of the battery module away from the circuit board. The negative electrode connector is connected to the negative terminal of the battery module via the display module. The instrument body contains a latch for engaging the display module. A housing is threadedly connected to the opening of the instrument body.

[0007] By adopting the above technical solution, during use, the circuit board inside the instrument body is fixed to the instrument body. When the battery needs to be replaced, since the battery module is slidably connected to the instrument body, the battery module can be slid along the opening of the instrument body to remove it from the instrument body. After replacing the battery module, it is inserted back into the instrument body, connecting to the positive terminal. The negative terminal of the battery module is connected to the main board through the negative terminal connection post after the display module covers the battery module. The display module is fixed to the instrument body by a clip. The battery module can be removed separately, eliminating complicated wiring and making battery module replacement more convenient.

[0008] Preferably, the battery module includes a housing and batteries disposed within the housing. Multiple batteries are disposed within the housing. Slide grooves are provided on opposite sides of the outer wall of the housing. A slider is disposed inside the instrument body. The length direction of the slider is the same as the orientation of the opening of the instrument body. The housing cooperates with the slider through the slide grooves.

[0009] By adopting the above technical solution, multiple batteries are set inside the housing. The batteries are first positioned by the housing, and then the sliding grooves on both sides of the housing are aligned with the slider inside the instrument body, so that the battery module is connected to the slider, thereby enabling the battery module to be connected to the circuit board more accurately.

[0010] Preferably, four batteries are provided, and four battery slots are evenly arranged circumferentially inside the housing. One end of each battery slot is provided with a bottom plate, and the other end is provided with a baffle. The end of the battery slot with the bottom plate is opposite to the positive terminal of the battery, and the end of the battery slot with the baffle is opposite to the negative terminal of the battery. The battery is located inside the battery slot, and the two ends of the battery are respectively abutted by the baffle and the bottom plate.

[0011] By adopting the above technical solution, four batteries are evenly arranged in four battery slots around the perimeter. Since the two ends of the batteries are restricted by the bottom and the baffle respectively, the position of the batteries along the length of the batteries is relatively firm relative to the casing, and it is more convenient to connect the battery module as a whole to the circuit board or display module.

[0012] Preferably, a support member is provided at the middle position of the four batteries. The cross-section of the support member is cross-shaped. The four batteries are respectively located at the four corners of the support member. The support member is inserted from the end of the battery into the middle position of the four batteries. The base plate, baffle and shell are integrally formed. The blocking width of the baffle on the battery slot is less than the distance that the support member pushes the battery to move.

[0013] By adopting the above technical solution, the support is set with a cross-shaped cross section. The support works with the battery slot to fix the battery in the housing. When the battery needs to be removed, the support needs to be removed from between the four batteries first, and then the batteries are slid away from the position blocked by the baffle in turn.

[0014] Preferably, both ends of the support member gradually taper, and an internal threaded hole is provided in the center of the support member.

[0015] By adopting the above technical solution, the two ends of the support gradually narrow. When installing the support, it can be directly inserted between the four batteries, making it easy for the support to enter between the four batteries. When removing the support, bolts can be installed in the internal threaded holes to pull out the support.

[0016] Preferably, the edge of the display module forms a connecting edge, the side of the baffle away from the battery is fixedly provided with a positioning pin, the connecting edge is provided with a positioning hole for connecting the positioning pin, and the negative terminal connecting post is used to abut against the connecting edge and connect to the negative terminal of the battery through the connecting edge and the display module.

[0017] By adopting the above technical solution, a positioning hole is opened on the connecting edge, and a positioning hole is fixedly set on the baffle. When the display module is fitted onto the baffle, the positioning pin is inserted into the positioning hole, so that the negative electrode connecting post is accurately electrically connected to the connecting edge.

[0018] Preferably, a spring is fixedly provided at the end of the negative electrode connection post away from the circuit board, and the spring is used to abut against the connection edge.

[0019] By adopting the above technical solution, a spring is set at the end of the negative electrode connection post away from the circuit board. The spring can improve the stability of the electrical connection between the negative electrode connection post and the connection edge, and at the same time facilitate the automatic pop-out of the display module after the buckle is removed.

[0020] Preferably, the buckle includes an elastic part, an abutting part, and a toggle part. One end of the elastic part is fixed to the slider, and the other end extends toward the opening of the instrument body and is fixed to the abutting part and the toggle part. The abutting part is perpendicular to the elastic part and extends from the elastic part toward the middle of the instrument body. The side of the abutting part connected to the elastic part is used to block the outside of the connecting edge.

[0021] By adopting the above technical solution, the elastic part supports the abutment part and the actuating part, which facilitates the movement of the abutment part and the actuating part. The abutment part is perpendicular to the elastic part, so that when the connecting edge of the display module reaches the position of the abutment part, the abutment part blocks the connecting edge, thereby fixing the battery module in the instrument body.

[0022] Preferably, the actuating part extends from the abutting part in a direction away from the display module, and the abutting part and the actuating part are arranged as inclined surfaces on the side facing the instrument opening.

[0023] By adopting the above technical solution, the toggle part extends from the contact part to the direction away from the display module, which makes it convenient for staff to operate the toggle part. At the same time, the inclined surfaces of the contact part and the toggle part facilitate the direct insertion of the battery module and the display module.

[0024] Preferably, a positioning block is provided at the bottom of the instrument body, and a positioning notch is provided around the circuit board. The bottom is secured to the positioning block by the positioning notch, and the circuit board is fixed to the instrument body by fixing screws.

[0025] By adopting the above technical solution, during the installation of the circuit board, the positioning notch on the circuit board is fixed on the positioning block, so that the circuit board is first accurately positioned in the instrument body, and then the battery module and display module are installed. This ensures that the relative positions of the battery module, display module and circuit board are relatively accurate, which is convenient for installation.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. Slide the battery module along the opening of the instrument body to replace the battery module. Then insert the battery module into the instrument body and connect the battery module to the positive terminal. The negative terminal of the battery module is connected to the main board through the negative terminal connection post after the display module cover is placed behind the battery module. This makes it easier to replace the battery module. 2. By restricting the battery at both ends through the bottom and the baffle, the battery's position relative to the casing along its length is made more secure, making it easier to connect the battery module to the circuit board or display module. 3. A positioning hole is opened on the connecting edge, and a positioning hole is fixedly set on the baffle. When the display module is fitted onto the baffle, the positioning pin is inserted into the positioning hole, so that the negative terminal connecting post is accurately electrically connected to the connecting edge. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application; Figure 2 This is an exploded view of a gas alarm device according to an embodiment of this application; Figure 3 This is a schematic diagram of the internal structure of the instrument body in the embodiments of this application; Figure 4 This is a schematic diagram of the circuit board structure in an embodiment of this application; Figure 5 This is a schematic diagram of the shell structure in an embodiment of this application; Figure 6 This is a schematic diagram showing the location of the battery inside the casing in an embodiment of this application; Figure 7This is a schematic diagram of the overall structure of the support member in the embodiments of this application; Figure 8 This is a schematic diagram of the position of the buckle in an embodiment of this application.

[0028] Explanation of reference numerals in the attached drawings: 1. Instrument body; 11. Positioning block; 12. Slider; 21. Antenna; 22. Alarm light; 23. Buzzer; 24. Explosion-proof switch; 25. Sensor; 3. Circuit board; 31. Negative terminal connecting post; 311. Spring; 32. Positive terminal connecting piece; 33. Positioning notch; 34. Fixing screw; 4. Battery module; 41. Housing; 42. Battery; 43. Stop bar; 44. Slide groove; 45. Battery slot; 46. Base plate; 461. Through hole; 47. Baffle; 471. Positioning pin; 472. Through hole; 5. Display module; 51. Connecting edge; 511. Positioning hole; 6. Case; 7. Support; 71. Internal threaded hole; 8. Buckle; 81. Elastic part; 82. Abutting part; 83. Moving part; 84. Inclined surface. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.

[0030] This application discloses a gas alarm device, with reference to... Figure 1 The device includes a main body 1, with an antenna 21 for wireless signal transmission mounted on its exterior. Also mounted on the exterior of the main body 1 are an alarm light 22, a buzzer 23, an explosion-proof switch 24, and a sensor 25. The sensor 25 detects gases in the surrounding environment. The alarm light 22 sounds an alarm when the gas concentration is too high, and the buzzer 23 simultaneously emits an audible signal to alert nearby personnel. The explosion-proof switch 24 is used to turn the gas alarm on or off.

[0031] refer to Figure 2 Inside the instrument body 1, there is a circuit board 3, a battery module 4, and a display module 5. One end of the instrument body 1 is open, and the other end is closed. The circuit board 3, battery module 4, and display module 5 are placed into the instrument body 1 through the opening. At the same time, a watch case 6 is set at the opening of the instrument body 1. The end of the watch case 6 facing the instrument body 1 is provided with external threads. The watch case 6 is threaded to the inner wall of the opening through the external threads, so that the watch case 6 is fixed to the instrument body 1. Meanwhile, the middle part of the watch case 6 is a transparent plate, through which the data on the display module 5 can be observed, so as to understand the data being detected more accurately.

[0032] refer to Figure 3 and Figure 4The circuit board 3 is located at the bottom of the instrument body 1 away from the opening. The circuit board 3 has a negative electrode connecting post 31 and a positive electrode connecting piece 32. The positive electrode connecting piece 32 is fixed to one side of the circuit board 3 and is elastically designed, so that one end of the positive electrode connecting piece 32 is fixed to the circuit board 3, and the other end is inclined away from the surface of the circuit board 3, so that the positive electrode connecting piece 32 can be electrically connected to the battery module 42. The negative electrode connecting post 31 is vertically fixed to the circuit board 3 and is used to connect to the battery module 4. Positioning notches 33 are provided around the circuit board 3. In this embodiment, four positioning notches 33 are provided. Simultaneously, a positioning block 11 is provided on the inner wall of the instrument body 1 near the bottom of the instrument body 1. The shape of the positioning block 11 matches the positioning notches 33, so that when the circuit board 3 is placed in the position of the positioning block 11, the position of the circuit board 3 is positioned by the positioning block 11. Furthermore, the four positioning notches 33 are arranged in a non-circular, uniform manner to prevent incorrect installation of the circuit board 3. Multiple fixing screws 34 are provided on the circuit board 3. The fixing screws 34 pass through the circuit board 3 and are threadedly connected to the bottom of the instrument body 1 through threaded holes, so that the circuit board 3 is fixed inside the instrument body 1.

[0033] refer to Figure 5 and Figure 6 The battery module 4 includes a housing 41 and a battery 42 disposed within the housing 41. Two parallel baffles 43 are provided on both sides of the outer wall of the housing 41, forming a groove 44 between the two baffles 43. The length direction of the baffles 43 is aligned with the opening of the instrument body 1, allowing the battery module 4 to slide into the instrument body 1 along the opening. Figure 3 A slider 12 is fixedly installed on the inner wall of the instrument body 1. The slider 12 is used to cooperate with the slide groove 44. The length direction of the slider 12 is consistent with the opening direction of the instrument body 1. The two sides of the slider 12 abut against the opposite side walls of the two baffles 43 to position the housing 41. When installing the battery 42, the battery 42 is first fixed in the housing 41, and then the battery module 4 is placed into the instrument body 1 as a whole, so that the positive terminal of the battery 42 abuts against the positive terminal connecting piece 32 on the circuit board 3.

[0034] refer to Figure 5The inner wall of the housing 41 is uniformly provided with four battery slots 45, and in this embodiment, four batteries 42 are provided. A base plate 46 is provided at one end of the housing 41, and the base plate 46 is integrally formed with the housing 41. The battery slots 45 are used to place the batteries 42, and the inner wall of the battery slots 45 is formed with the same arc surface as the outer wall of the batteries 42. The two ends of the batteries 42 correspond to the two ends of the battery slots 45, and the positive terminal of the batteries 42 faces the base plate 46. A through hole 461 for passing through the positive terminal of the batteries 42 is provided on the base plate 46. A baffle 47 is provided at the end of the housing 41 away from the base plate 46. The baffle 47 is integrally formed with the housing 41 and is used to block the negative terminal of the batteries 42, so that the batteries 42 are first inserted into the housing 41 from the end of the housing 41 away from the base plate 46, and then the batteries 42 are placed into the battery slots 45, with the negative terminal of the batteries 42 abutting against the surface of the baffle 47. In this embodiment, two baffles 47 are provided, each baffle 47 being used to contact the negative terminals of the two batteries 42. The housing 41, baffles 47, and base plate 46 are all made of insulating plastic. The four batteries 42 are arranged in a square, with the two baffles 47 located on opposite sides of the square formed by the battery arrangement, and the two sliding grooves 44 located on opposite sides of the square formed by the battery arrangement, with the sliding grooves 44 and baffles 47 respectively located on adjacent sides of the square formed by the battery arrangement.

[0035] refer to Figure 6 and Figure 7 A support member 7 is positioned in the middle of the four batteries 42. The width of the baffle 47 blocking the end of the battery slot 45 is less than the maximum distance the support member 7 can push the battery 42 to move. This means that when a battery 42 is removed from the battery slot 45, the support member 7 must be removed first before the end of the battery 42 can move out from the position where the baffle 47 blocks the battery slot 45. This ensures good positioning of both ends of the battery 42, preventing it from sliding along its length within the battery slot 45. The support member 7 has a cross-shaped cross section, so that when placed in the middle of the four batteries 42, the four corners of the support member 7 correspond one-to-one with the four batteries 42, pushing the battery 42 into the battery slot 45. To facilitate insertion of the support member 7 between the four batteries 42, both ends of the support member 7 are tapered, allowing either end of the support member 7 to be inserted between the four batteries 42. The support member 7 also has an internally threaded hole 71 at its center, which can be used to thread a bolt, allowing the support member 7 to be easily removed from between the four batteries 42. No bolt is installed in the internally threaded hole 71 when the support member 7 is installed.

[0036] refer to Figure 2 and Figure 6The display module 5 has a connecting edge 51 at its edge, located at the end of the display module 5 closest to the battery module 4. The connecting edge 51 is parallel to the baffle 47. Multiple positioning pins 471 perpendicular to the surface of the baffle 47 are fixedly arranged on the surface of the baffle 47 facing the connecting edge 51. In this embodiment, four positioning pins 471 are provided. Positioning holes 511 are formed on the connecting edge 51, and the positioning holes 511 cooperate with the positioning pins 471. The baffle 47 has a through hole 472 for the negative electrode connecting post 31 to pass through, allowing the negative electrode connecting post 31 to pass through the through hole 472 of the baffle 47 and abut against the connecting edge 51 of the display module 5. This allows the negative electrode connecting post 31 to connect to the negative terminal of the battery 42 via the connecting edge 51 and the display module 5, thereby enabling the battery 42 to supply power to the circuit board 3. A spring 311 is installed inside the negative electrode connection post 31 at the end away from the circuit board 3. One end of the spring 311 is fixed to the negative electrode connection post 31, and the other end is used to abut against the connection edge 51 to improve the conductivity stability of the negative electrode connection post 31.

[0037] refer to Figure 8 Each of the two sliders 12 has a latch 8 at one end near the opening of the instrument body 1. The latch 8 is used to engage with the connecting edge 51 of the display module 5, allowing the display module 5 and battery module 4 to be easily and stably connected inside the instrument body 1. The latch 8 includes an elastic part 81, an abutment part 82, and a lever part 83, which are integrally formed. One end of the elastic part 81 is fixed to the middle of the slider 12, and the length direction of the elastic part 81 is along the length direction of the slider 12. The end of the elastic part 81 near the opening of the instrument body 1 is used to fix the lever part 83 and the abutment part 82. The abutment part 82 is perpendicular to the elastic part 81 and extends towards the middle of the instrument body 1, so that the abutment part 82 can block the outer surface of the connecting edge 51 of the display module 5. The lever part 83 extends from the abutment part 82 away from the display module 5, making it easy to pry open the latch 8. The side of the contact part 82 and the toggle part 83 facing the instrument opening is set as an inclined surface 84, so that the battery module 4 and the display module 5 can push the buckle 8 outward through the inclined surface 84.

[0038] The installation process in this embodiment: First, assemble the battery module 4. During assembly, first place the four batteries 42 into the four battery slots 45 respectively. Then, insert the support 7 into the middle of the four batteries 42 from one end. The support 7 supports the four batteries 42. Since the circuit board 3 is fixed inside the instrument body 1, simply insert the assembled battery module 4 directly into the instrument body 1. Due to the positioning of the slider 12, the battery module 4 can be installed relatively accurately. Stop when the buckle 8 blocks the end of the battery module 4 away from the circuit board 3 to prevent the battery module 4 from coming out. When the opening of the instrument body 1 is vertically downward, when releasing the battery module 4 to install the display module 5, the battery module 4 will not come out directly. After the battery module 4 is blocked by the buckle 8, install the display module 5 according to the positioning pin 471. Pressing it will lock the buckle 8 onto the connecting edge 51. Finally, rotate the connecting case 6.

[0039] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A gas alarm, comprising an instrument body (1), characterized in that: The instrument body (1) is provided with a circuit board (3), a battery module (4) and a display module (5). One end of the instrument body (1) is open. The circuit board (3) is fixed to the end of the instrument body (1) away from the opening. The circuit board (3) is provided with a positive electrode connecting piece (32) and a negative electrode connecting post (31). The battery module (4) is slidably connected to the instrument body (1). The battery module (4) is used to abut against the positive electrode connecting piece (32). The display module (5) covers the end of the battery module (4) away from the circuit board (3). The negative electrode connecting post (31) is connected to the negative electrode of the battery module (4) through the display module (5). The instrument body (1) is provided with a buckle (8) for snapping the display module (5). The opening of the instrument body (1) is threaded with a watch case (6). The battery module (4) includes a housing (41) and a battery (42) disposed inside the housing (41). Multiple batteries (42) are disposed inside the housing (41). Slide grooves (44) are provided on opposite sides of the outer wall of the housing (41). A slider (12) is disposed inside the instrument body (1). The length direction of the slider (12) is the same as the orientation of the opening of the instrument body (1). The housing (41) cooperates with the slider (12) through the slide grooves (44). The battery (42) is provided in four parts. Four battery slots (45) are evenly arranged in the inner circumference of the housing (41). One end of the battery slot (45) is provided with a bottom plate (46) and the other end is provided with a baffle (47). One end of the battery slot (45) with the bottom plate (46) is opposite to the positive terminal of the battery (42), and one end of the battery slot (45) with the baffle (47) is opposite to the negative terminal of the battery (42). The battery (42) is located in the battery slot (45) and the two ends of the battery (42) are respectively abutted by the baffle (47) and the bottom plate (46). The edge of the display module (5) has a connecting edge (51). The side of the baffle (47) facing away from the battery (42) is fixedly provided with a positioning pin (471). The connecting edge (51) has a positioning hole (511) for connecting the positioning pin (471). The negative terminal connecting post (31) is used to abut against the connecting edge (51) and is connected to the negative terminal of the battery (42) through the connecting edge (51) and the display module (5).

2. A gas alarm device according to claim 1, characterized in that: A support member (7) is provided at the middle position of the four batteries (42). The cross-section of the support member (7) is cross-shaped. The four batteries (42) are located at the four corners of the support member (7). The support member (7) is inserted from the end of the battery (42) into the middle position of the four batteries (42). The bottom plate (46), the baffle (47) and the shell (41) are integrally formed. The blocking width of the baffle (47) on the battery slot (45) is less than the distance that the support member (7) pushes the battery (42) to move.

3. A gas alarm device according to claim 2, characterized in that: The two ends of the support member (7) gradually narrow, and the center of the support member (7) is provided with an internal thread hole (71).

4. A gas alarm device according to claim 1, characterized in that: A spring (311) is fixedly provided at the end of the negative terminal connecting post (31) away from the circuit board (3), and the spring (311) is used to abut against the connecting edge (51).

5. A gas alarm device according to claim 4, characterized in that: The buckle (8) includes an elastic part (81), an abutment part (82), and a lever part (83). One end of the elastic part (81) is fixed to the slider (12), and the other end extends toward the opening of the instrument body (1) and is fixed to the abutment part (82) and the lever part (83). The abutment part (82) is perpendicular to the elastic part (81) and extends from the elastic part (81) toward the middle of the instrument body (1). The side of the abutment part (82) connected to the elastic part (81) is used to block the outside of the connecting edge (51).

6. A gas alarm device according to claim 5, characterized in that: The actuating part (83) extends from the abutting part (82) in a direction away from the display module (5), and the abutting part (82) and the actuating part (83) are arranged as inclined surfaces (84) on the side facing the instrument opening.

7. A gas alarm device according to claim 1, characterized in that: The instrument body (1) has a positioning block (11) at its bottom and a positioning notch (33) around its circuit board (3). The bottom is secured to the positioning block (11) by the positioning notch (33), and the circuit board (3) is fixed to the instrument body (1) by fixing screws (34).

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