Circuit mainboard structure for gas alarm and gas alarm

Abstract

The utility model relates to alarm equipment technical field especially relates to circuit mainboard structure and gas alarm for gas alarm, and the mainboard includes first pin connection group and second pin connection group, is used for matching infrared methane sensor or laser methane sensor installation, two independent pin connection groups are arranged on the mainboard, the first pin connection group adapts the pin configuration of laser methane sensor, and is installed in the first area of mainboard, the second pin connection group adapts the pin configuration of infrared methane sensor, and is installed in the second area of mainboard, the scheme passes through unified mainboard design, need not respectively design special mainboard for laser methane sensor and infrared methane sensor, can significantly reduce the cost such as mould, material and warehousing, the scheme allows the sensor type to be switched fast on the same production line, need not change mainboard, and then improved the flexibility and efficiency of production assembly, when after -sales maintenance, need not according to sensor model matching specific mainboard, reduces the complexity of spare parts management.

Description

Technical Field

[0001] This utility model relates to the field of alarm equipment technology, and in particular to the circuit board structure for a gas alarm and the gas alarm itself. Background Technology

[0002] A gas alarm is a device used to detect gas leaks. Existing gas alarms (especially household gas alarms) mainly detect the concentration of gas in the environment by using laser methane sensors and infrared methane sensors installed on the main board. When the concentration of gas in the environment exceeds a threshold, the control unit on the main board controls the alarm unit on the main board to emit alarm signals such as sound, light, or remote notification. Therefore, the main board design of the gas alarm needs to be customized according to the pin layout of the infrared methane sensor and the laser methane sensor.

[0003] Because different sensors have significant differences in the number of pins, spacing, and electrical interfaces, in traditional solutions, manufacturers must design dedicated motherboards for infrared methane sensors and laser methane sensors respectively; this results in the following drawbacks of existing gas alarm technologies:

[0004] First, two independent motherboard production lines need to be developed, increasing mold, material, and warehousing costs.

[0005] Second, if the sensor type needs to be switched during the production and assembly process, the motherboard must be replaced, which affects the efficiency of production and assembly.

[0006] Third, after-sales maintenance requires matching a specific motherboard to the sensor model, which increases the difficulty of spare parts management.

[0007] Based on this, the applicant is considering designing a gas alarm that is easy to manufacture, assemble, and maintain. Utility Model Content

[0008] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is: how to provide a gas alarm that is easy to manufacture, assemble and maintain.

[0009] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0010] The circuit board structure for a gas alarm includes a main board and a detection component, an alarm component, and a control component mounted thereon. The detection component is used to detect combustible gas, the alarm component is used to issue an alarm, and the control component is electrically connected to the detection component and the alarm component respectively. The main board includes a first pin connection group and a second pin connection group that are independent of each other and electrically connected to the corresponding pins on the control component. The detection component is an infrared methane sensor or a laser methane sensor.

[0011] The first pin connection group is disposed in the first area of ​​the motherboard, and the layout of the first pin connection group is adapted to and used for the pin insertion of the laser methane sensor.

[0012] The second pin connection group is located in the second area of ​​the motherboard, and the layout of the second pin connection group is adapted for and used for the pin insertion of the infrared methane sensor.

[0013] The working principle and advantages of the circuit board structure used in this technical solution for gas alarms are as follows:

[0014] The motherboard features two independent pin connection groups. The first pin connection group, adapted to the pin configuration of the laser methane sensor, is installed in the first area of ​​the motherboard; the second pin connection group, adapted to the pin configuration of the infrared methane sensor, is installed in the second area of ​​the motherboard. These two pin connection groups are independent of each other, allowing for selective installation of either the laser methane sensor or the infrared methane sensor based on production, customer, and usage environment requirements. This ensures the motherboard is compatible with both laser and infrared methane sensors without requiring a dedicated motherboard for each type. This unified motherboard design eliminates the need for separate motherboards for laser and infrared methane sensors, significantly reducing costs associated with molds, materials, and warehousing. This solution allows for rapid switching of sensor types on the same production line without replacing the motherboard, thus improving production flexibility and efficiency. In after-sales maintenance, there is no need to match specific motherboards to sensor models, reducing the complexity of spare parts management. The gas alarm based on this solution better meets various needs in different scenarios while reducing production, maintenance, and operating costs.

[0015] Furthermore, the first pin connection group includes two rows of pin holes, each row of pin holes including multiple horizontally distributed pin holes, and the laser methane sensor is provided with two rows of first pin groups corresponding one-to-one with the pin holes.

[0016] Furthermore, the second pin connection group includes two rows of pin holes, each row of pin holes including multiple vertically distributed pin holes, and the infrared methane sensor is provided with two rows of second pin groups corresponding one-to-one with the pin holes.

[0017] Furthermore, the first region and the second region partially overlap to form an L-shaped sensor mounting area, and the entire surface of the motherboard is a rectangular surface, with the included angle of the L-shaped sensor mounting area coinciding with the included angle of the rectangular surface.

[0018] A gas alarm includes the aforementioned circuit board structure for a gas alarm, and also includes a detachably connected lower housing and an upper housing. The lower housing has a receiving groove on its front side to accommodate the circuit board, and the upper housing opens and closes the receiving groove.

[0019] Furthermore, a plurality of snap-fit ​​posts are fixedly connected to the bottom side of the receiving groove, which snap into the edge of the motherboard.

[0020] Furthermore, a plurality of positioning posts are fixedly connected to the bottom side of the receiving groove, and a plurality of positioning grooves corresponding to the positioning posts are opened on the edge of the motherboard; a plurality of support parts protruding from the bottom side of the receiving groove and contacting the bottom side of the motherboard are provided.

[0021] Furthermore, the lower housing has a side opening that communicates with the interior of the receiving groove, and the upper housing has a top opening that communicates with the interior of the receiving groove. The laser methane sensor or the infrared methane sensor mounted on the motherboard is located directly below the top opening.

[0022] Furthermore, the upper housing is also provided with control buttons for controlling the motherboard.

[0023] Furthermore, it also includes a mounting base, and the back of the lower housing is provided with a connecting groove that can be detachably connected to the mounting base. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of the motherboard in an embodiment of the present invention. Figure 1 ;

[0025] Figure 2 This is a top view of the motherboard in an embodiment of the present invention;

[0026] Figure 3 This is a bottom view of the motherboard structure according to an embodiment of the present invention;

[0027] Figure 4 This is a three-dimensional structural diagram of the motherboard in an embodiment of the present invention. Figure 2 (When installing a laser methane sensor);

[0028] Figure 5 This is a three-dimensional structural diagram of the motherboard in an embodiment of the present invention. Figure 2 (When installing an infrared methane sensor);

[0029] Figure 6 This is a three-dimensional structural diagram of the laser methane sensor according to an embodiment of the present invention;

[0030] Figure 7 This is a three-dimensional structural diagram of the infrared methane sensor according to an embodiment of the present invention;

[0031] Figure 8 This is a three-dimensional structural diagram of the gas alarm device according to an embodiment of the present utility model;

[0032] Figure 9A three-dimensional structural diagram of the motherboard and lower housing for mounting the infrared methane sensor according to an embodiment of this utility model;

[0033] Figure 10 This is a three-dimensional structural diagram of the lower shell according to an embodiment of the present utility model;

[0034] Figure 11 This is a schematic diagram showing the connection between the housing and the mounting base in an embodiment of this utility model;

[0035] Figure 12 This is a diagram showing the pinout of the main control chip and the wiring diagram for some of its pins.

[0036] Figure 13 Circuit diagram of the indicator light section that is electrically connected to the main control chip;

[0037] Figure 14 The circuit diagram shows the buzzer section electrically connected to the main control chip.

[0038] Figure 15 Circuit diagrams for the power supply section, the interface section on the circuit board, the 5V constant voltage output section, the 3V constant voltage output section, the solenoid valve output, the peripheral switches, etc.

[0039] Figure 16 This is the circuit diagram for the solenoid valve control section.

[0040] Figure 17 This is the circuit diagram for the laser methane sensor section;

[0041] Figure 18 This is the circuit diagram for the infrared methane sensor section;

[0042] In the above attached figures:

[0043] 100. Mainboard; 101. Sensor mounting area; 110. First pin connection group; 120. Second pin connection group; 130. Positioning slot; 140. Snap-fit ​​slot;

[0044] 200. Laser methane sensor; 210. First pin group;

[0045] 300. Infrared methane sensor; 310. Second pin group;

[0046] 410. Lower housing; 411. Positioning post; 412. Snap-fit ​​post; 413. Side opening; 414. Power connection through hole; 415. Connecting groove; 416. Support part; 420. Upper housing; 421. First top opening; 422. Second top opening; 430. Control button;

[0047] 500. Mounting bracket. Detailed Implementation

[0048] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0049] Refer to together Figures 1-7 This embodiment provides a circuit board structure for a gas alarm, including a main board 100 and a detection component, an alarm component, and a control component mounted thereon. The detection component is used to detect combustible gas, the alarm component is used to issue an alarm, and the control component is electrically connected to the detection component and the alarm component respectively. The main board 100 includes a first pin connection group 110 and a second pin connection group 120 that are independent of each other and electrically connected to corresponding pins on the control component. The detection component is an infrared methane sensor 300 or a laser methane sensor 200. The first pin connection group 110 is disposed in a first area of ​​the main board 100, and the layout of the first pin connection group 110 is adapted to and used for the pin insertion of the laser methane sensor 200. The second pin connection group 120 is disposed in a second area of ​​the main board 100, and the layout of the second pin connection group 120 is adapted to and used for the pin insertion of the infrared methane sensor 300.

[0050] In this embodiment, the motherboard 100 is provided with two independent pin connection groups. The first pin connection group 110 is adapted to the pin configuration of the laser methane sensor 200 and is installed in the first area of ​​the motherboard 100; the second pin connection group 120 is adapted to the pin configuration of the infrared methane sensor 300 and is installed in the second area of ​​the motherboard 100. These two pin connection groups are independent of each other, allowing the selective installation of either the laser methane sensor 200 or the infrared methane sensor 300 according to production, customer, and usage environment requirements. This makes the motherboard 100 compatible with both the laser methane sensor 200 and the infrared methane sensor 300 without the need to design a dedicated device for each sensor. Mainboard 100; This solution, through a unified mainboard 100 design, eliminates the need for separate mainboard 100 designs for the laser methane sensor 200 and the infrared methane sensor 300, significantly reducing costs related to molds, materials, and warehousing. This solution allows for rapid switching of sensor types on the same production line without replacing the mainboard 100, thereby improving the flexibility and efficiency of production assembly. During after-sales maintenance, there is no need to match a specific mainboard 100 based on the sensor model, reducing the complexity of spare parts management. The circuit board structure of this solution for gas alarms better meets various needs in different scenarios, while reducing production, maintenance, and usage costs.

[0051] Furthermore, such as Figures 1-7 As shown, the first pin connection group 110 includes two rows of pin holes, each row of pin holes including multiple horizontally distributed pin holes. The laser methane sensor 200 is provided with two rows of first pin groups 210 corresponding one-to-one with the pin holes. The first pin connection group 110 adopts a layout of two rows of pin holes, each row of pin holes is horizontally distributed and corresponds one-to-one with the first pin groups 210 of the laser methane sensor 200. Through the alignment of the two rows of pin holes, the laser methane sensor 200 can be quickly inserted into the motherboard 100 for connection. The design of the two rows of pin holes can ensure a more stable connection between the laser methane sensor 200 and the motherboard 100.

[0052] Furthermore, such as Figures 1-7As shown, the second pin connection group 120 includes two rows of pin holes, each row including multiple vertically distributed pin holes. The infrared methane sensor 300 is provided with two rows of second pin groups 310 corresponding one-to-one with the pin holes. The second pin connection group 120 also adopts a two-row pin hole layout, with each row of pin holes vertically distributed and corresponding one-to-one with the first pin group 210 of the infrared methane sensor 300. Through the alignment of the two rows of pin holes, the infrared methane sensor 300 can be quickly inserted into the motherboard 100 for connection. The design of the two rows of pin holes ensures that the infrared methane sensor 300 and the motherboard 100 are connected. The connection is more stable; the vertical distribution of each row of pin holes in the second pin group 310 allows the infrared methane sensor 300 to be mounted vertically on the motherboard 100, while the horizontal distribution of each row of pin holes in the first pin group 210 allows the laser methane sensor 200 to be mounted horizontally on the motherboard 100. This clearly distinguishes the mounting method and shape of the laser methane sensor 200 and the infrared methane sensor 300, effectively avoiding the problem of mis-installation of sensors; specifically, the pin holes of the first pin connection group 110 and the pin holes of the second pin connection group 120 are separated by isolation lines on the motherboard 100 to avoid mutual interference.

[0053] Furthermore, such as Figures 1-7 As shown, the first region and the second region partially overlap to form an L-shaped sensor mounting area 101. The main board 100 has a rectangular board surface, and the included angle of the L-shaped sensor mounting area 101 coincides with the included angle of the rectangular board surface. The partial overlap of the first and second regions allows the main board 100 to simultaneously support the installation of the laser methane sensor 200 and the infrared methane sensor 300 within a limited space, optimizing the installation space of the main board 100 and making full use of the effective area of ​​the main board 100. This is particularly suitable for devices that require a compact design, such as home gas alarms. It avoids the waste of the main board 100 area when the first and second regions are completely independent. Furthermore, the L-shaped mounting area allows the laser methane sensor 200 to be installed horizontally and the infrared methane sensor 300 to be installed vertically.

[0054] Gas alarm, such as Figures 8-11 As shown, the gas alarm includes the circuit board structure described above for a gas alarm. The gas alarm also includes a detachable lower housing 410 and an upper housing 420. The lower housing 410 has a receiving groove on its front side to accommodate the main board 100, and the upper housing 420 opens and closes the receiving groove. The detachable lower housing 410 and upper housing 420 protect the main board 100 and sensors inside the receiving groove. The detachable upper housing 420 and lower housing 410 allow users or maintenance personnel to easily open the gas alarm and access the internal components, facilitating installation, replacement, or maintenance.

[0055] Furthermore, such as Figure 9 and Figure 10 As shown, a plurality of locking posts 412 are fixedly connected to the bottom side of the receiving groove to engage with the edge of the motherboard 100; the engagement of the multiple locking posts 412 with the edge of the motherboard 100 ensures the stability of the motherboard 100 in the receiving groove and prevents displacement or loosening caused by vibration or external force; the locking posts 412 allow the motherboard 100 to be quickly installed and fixed, and are easy to disassemble, simplifying the installation and maintenance process; specifically, the edge of the motherboard 100 is provided with a plurality of locking slots 140 corresponding to the locking posts 412.

[0056] Furthermore, such as Figure 9 and Figure 10 As shown, a plurality of positioning posts 411 are fixedly connected to the bottom side of the receiving groove, and a plurality of positioning grooves 130 corresponding to the positioning posts 411 are opened on the edge of the motherboard 100; a plurality of support parts 416 protruding from the bottom side of the receiving groove and contacting the bottom side of the motherboard 100 are provided; a plurality of positioning grooves 130 corresponding to the positioning posts 411 are opened on the edge of the motherboard 100, and the positioning posts 411 are inserted into the positioning grooves 130 to ensure the precise installation and stability of the motherboard 100 in the receiving groove; a plurality of support parts 416 protruding from the bottom side of the receiving groove, these support parts 416 contacting the bottom side of the motherboard 100, providing physical support for the motherboard 100 and preventing the motherboard 100 from deforming or loosening due to external force or vibration.

[0057] Furthermore, such as Figures 8-11As shown, the lower housing 410 has a side opening 413 communicating with the interior of the receiving groove on its side wall, and the upper housing 420 has a top opening communicating with the interior of the receiving groove on its top side. The laser methane sensor 200 or the infrared methane sensor 300 mounted on the main board 100 are both located directly below the top opening. The side opening 413 and the top opening 413 communicating with the interior of the receiving groove are respectively provided on the side wall of the lower housing 410 and the top opening 413 on the top side of the upper housing 420, ensuring that the interior space of the receiving groove is connected to the external space and that the sensor can effectively detect the concentration of gas in the environment. The cooperation between the side opening 413 on the side wall of the lower housing 410 and the top opening 413 on the top side of the upper housing 420, and the fact that the sensor is located directly below the top opening, can accelerate air circulation and improve the accuracy and timeliness of sensor detection. Specifically, the lower housing 410 has openings on its left, right and bottom sides. A side opening 413 is provided, which includes multiple strip-shaped holes; a top opening includes a first top opening 421 and a second top opening 422. The first top opening 421 includes multiple horizontally distributed rhomboid portions, each rhomboid portion including several round holes, and the second top opening 422 includes multiple horizontally distributed strip-shaped holes. When the laser methane sensor 200 is installed, it is located directly below the first top opening 421. When the infrared methane sensor 300 is installed, it is located below the first top opening 421 and the second top opening 422. The arrangement of the first top opening 421 and the second top opening 422 can accommodate the installation of the laser methane sensor 200 and the infrared methane sensor 300, while improving the aesthetics of the housing. More specifically, the alarm components (such as sound alarm components, wireless alarm components, or alarm lights) provided on the main board 100 are all located directly below the top openings to ensure the effective propagation of alarm signals.

[0058] Furthermore, such as Figure 8 and Figure 9 As shown, the upper housing 420 is also provided with a control button 430 for controlling the mainboard 100; the user can directly operate the mainboard 100 through the control button 430, such as turning the device on or off, or adjusting certain parameters of the device. Of course, the user may need to control the gas alarm through an external device (such as a remote control or a mobile application).

[0059] Furthermore, such as Figure 11As shown, the gas alarm also includes a mounting base 500. The back of the lower housing 410 is provided with a connecting groove 415 that can be detachably connected to the mounting base 500. The mounting base 500 can be fixed to a wall or other mounting platform by means of adhesive, screws, etc. The lower housing 410 is detachably connected to the mounting base 500 through the connecting groove 415. The lower housing 410 can be installed and removed from the mounting base 500 by rotating, which is convenient and quick. Specifically, a power connection through hole 414 is also provided at the bottom of the lower housing 410 to facilitate the power cord to pass through the lower housing 410 and connect to the main board 100.

[0060] Specifically, such as Figures 12-18 The circuit diagram of the main board 100 shown above uses the main control chip, which is a domestically produced CST92F25 chip. The main board 100 is equipped with indicator lights, buzzers (alarm devices), peripheral switches and other components to ensure the normal operation of the gas alarm circuit main board.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A circuit board structure for a gas alarm, comprising a main board and a detection component, an alarm component, and a control component mounted thereon, wherein the detection component is used to detect combustible gas, the alarm component is used to issue an alarm, and the control component is electrically connected to the detection component and the alarm component respectively, characterized in that, The motherboard includes a first pin connection group and a second pin connection group that are independent of each other and electrically connected to the corresponding pins on the control device. The detection device is an infrared methane sensor or a laser methane sensor. The first pin connection group is disposed in the first area of ​​the motherboard, and the layout of the first pin connection group is adapted to and used for the pin insertion of the laser methane sensor. The second pin connection group is located in the second area of ​​the motherboard, and the layout of the second pin connection group is adapted for and used for the pin insertion of the infrared methane sensor.

2. The circuit board structure for a gas alarm as described in claim 1, characterized in that, The first pin connection group includes two rows of pin holes, each row of pin holes including multiple horizontally distributed pin holes, and the laser methane sensor is provided with two rows of first pin groups corresponding one-to-one with the pin holes.

3. The circuit board structure for a gas alarm as described in claim 1, characterized in that, The second pin connection group includes two rows of pin holes, each row of pin holes including multiple vertically distributed pin holes, and the infrared methane sensor is provided with two rows of second pin groups that correspond one-to-one with the pin holes.

4. The circuit board structure for a gas alarm as described in any one of claims 1 to 3, characterized in that, The first region and the second region partially overlap to form an L-shaped sensor mounting area, and the entire surface of the motherboard is a rectangular surface. The included angle of the L-shaped sensor mounting area coincides with the included angle of the rectangular surface.

5. A gas alarm, characterized in that, The circuit board structure for a gas alarm as described in any one of claims 1 to 4 further includes a detachably connected lower housing and an upper housing, wherein the front of the lower housing is provided with a receiving groove for accommodating the main board, and the upper housing opens and closes the receiving groove.

6. The gas alarm as described in claim 5, characterized in that, The bottom side of the receiving groove is fixedly connected with a plurality of snap-fit ​​posts that snap into the edge of the motherboard.

7. The gas alarm as described in claim 5, characterized in that, Multiple positioning posts are fixedly connected to the bottom side of the receiving groove, and multiple positioning grooves corresponding to the positioning posts are opened on the edge of the motherboard; multiple support parts protruding from the bottom side of the receiving groove and contacting the bottom side of the motherboard are provided.

8. The gas alarm as described in claim 5, characterized in that, The lower housing has a side opening that communicates with the interior of the receiving groove, and the upper housing has a top opening that communicates with the interior of the receiving groove. The laser methane sensor or the infrared methane sensor mounted on the motherboard is located directly below the top opening.

9. The gas alarm as described in claim 5, characterized in that, The upper housing is also equipped with control buttons for controlling the motherboard.

10. The gas alarm as described in claim 5, characterized in that, It also includes a mounting base, and the back of the lower housing is provided with a connecting groove that can be detachably connected to the mounting base.

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