A domestic gas alarm

Abstract

This application relates to a household gas alarm, belonging to the technical field of gas safety monitoring. It includes a housing, a circuit board, and wires. The housing consists of a base, a top cover, and a disc. The top cover has a hemispherical recess in the center, and the disc has a snap-fit ​​structure connecting to a support column in the recess of the top cover, forming a ring-shaped display area and a gas intake channel. A protrusion at the bottom of the disc triggers a push-button switch, and a ring-shaped comb-like support column is located in the center of the bottom of the disc. The circuit board is mounted inside the base, with a sensor at the center and three dual-color light-emitting elements on the periphery. The wires are detachably connected to the circuit board and are designed with foolproof measures to prevent incorrect wire insertion. A wire outlet groove is provided on the back of the base for adjusting the wire direction. This application simplifies the mold structure, improves assembly efficiency, enhances display clarity, optimizes gas detection performance, and allows for flexible adjustment of the wire direction.

Description

Technical Field

[0001] This application relates to the technical field of gas safety monitoring, and in particular to a household gas alarm. Background Technology

[0002] Currently, natural gas, as a clean energy source, is becoming increasingly common in residential households, and gas alarms, as gas safety monitoring products, are also becoming more widespread. Gas alarms play a crucial role in ensuring the safe use of gas in residential homes. Their widespread application increases people's awareness of dangerous situations such as gas leaks and reduces potential safety hazards. With social development, gas alarms have evolved from simply meeting functional needs to being more aesthetically pleasing and practical, changing their current form to better suit market demands.

[0003] In the design and application of gas alarms, there are usually independent LED indicator lights to indicate the product status. However, there are some defects in the existing technology: according to relevant regulations, household gas alarms must have indicator lights for several statuses. Generally, product designs use independent LED indicator lights to achieve this. Since the area of ​​LED indicator lights is relatively small, it affects the status identification when the distance is relatively far, and may even directly affect the observation effect at different angles.

[0004] Some manufacturers have adopted a ring-shaped display design, which involves placing multiple LEDs inside the ring structure. To ensure good protection and aesthetics when not powered, a cover film structure needs to be added to this display area. However, when the LEDs are too close to the light-emitting surface, they easily form light spots, resulting in poor performance. To eliminate these spots, the number of LEDs needs to be increased. If the distance is too far, light guides need to be added to evenly distribute the light source. However, this leads to complex designs and manufacturing processes, increasing manufacturing difficulty and cost. Utility Model Content

[0005] In order to overcome the above problems, this application provides a household gas alarm.

[0006] The technical solution for a household gas alarm provided in this application is as follows: A household gas alarm, characterized in that it includes a housing, a circuit board, and wires. The housing consists of a base, a top cover, and a disc. The base and the top cover are detachably connected. The middle part of the top cover has a hemispherical recessed structure. The disc is detachably connected to the hemispherical recessed structure of the top cover. The hemispherical recessed structure and the circumferential edge of the disc form an annular display area. The annular gap formed between the disc and the top cover also serves as a gas intake channel. The circuit board is installed in the base, and a sensor is set at its center. Three dual-color light-emitting elements are arranged at intervals around the sensor. The dual-color light-emitting elements and the sensor both penetrate the hemispherical recessed structure of the top cover and are simultaneously covered by the disc. The wires are detachably connected to the circuit board. A socket for mounting the wires is opened at the bottom of the base, and a wire outlet groove for adjusting the direction of the wires is provided on the back of the base.

[0007] By adopting the above technical solution, the air intake channel and the ring display are integrated, reducing the complexity of mold design and improving the product's aesthetics. The ring air intake channel is beneficial to the sensor's gas response time and directional performance. The use of dual-color light-emitting elements and the ring display area increases the light-emitting area and viewing angle, improving the identification of the alarm status. Other colors can also be combined to enhance visual appeal. The disc and the top cover are detachably connected, facilitating assembly and disassembly. The circuit board is installed inside the base, providing sufficient assembly space for electronic components and facilitating integration with mechanical structures. The replaceable wire design meets the needs of different customers for wire length and plug type, and the wire output direction can be adjusted through the wire outlet groove on the back of the base, facilitating on-site wiring and making the wiring neat and aesthetically pleasing.

[0008] Optionally, three sets of snap-fit ​​structures are fixed on the disc. The three sets of snap-fit ​​structures are spaced apart along the circumference of the disc. The snap-fit ​​structure includes a latch and a barb. The hemispherical recess of the top cover is provided with multiple sets of cavity support columns for detachable connection with the snap-fit ​​structure.

[0009] By adopting the above technical solution, the disc and the top cover are detachably connected by using the snap-fit ​​structure on the disc and the cavity support at the hemispherical recessed structure of the top cover, making the assembly and disassembly of the alarm simple and reliable.

[0010] Optionally, support blocks are fixed on both sides of the snap-fit ​​structure, and the support blocks are also fixed to the bottom of the disc.

[0011] By adopting the above technical solution, the support block can enhance the stability of the snap-fit ​​structure, making the connection between the disc and the hemispherical recessed structure of the upper cover more stable, thereby ensuring the stability of the annular display area and the annular air intake channel structure as well as the fixed gap spacing, which is conducive to the stable operation of the alarm's luminous display and gas detection functions.

[0012] Optionally, the bottom of the disc is provided with a protrusion, which is spaced apart from the snap-fit ​​structure. A cantilever support is provided on the top cover at the position corresponding to the protrusion. The cantilever support passes through the top cover and abuts against the button provided on the circuit board. When the protrusion presses the cantilever support, the button can be triggered.

[0013] By adopting the above technical solution, the protrusions at the bottom of the disc are spaced apart from the snap-fit ​​structure. When the disc is pressed, the protrusions at the bottom of the disc can press the corresponding cantilever support on the top cover. Since the cantilever support passes through the top cover and abuts against the button on the circuit board, the pressing of the protrusions against the cantilever support can trigger the button switch. This design increases the operating area of ​​the button, making it more convenient for users to operate the button and improving the convenience and comfort of user operation.

[0014] Optionally, the inner wall of the disk is provided with annular comb-shaped support columns at intervals in the middle position. The ends of the comb-shaped support columns maintain a preset gap with the sensor surface, and the spacing width of the comb-shaped support columns is adapted to the sensor air inlet diameter.

[0015] By adopting the above technical solution, the comb-shaped support can protect the sensor and prevent foreign objects such as particulate matter from entering the sensor. Moreover, the arrangement of the comb-shaped support will not affect the air intake of the sensor, thus ensuring the normal operation of the sensor.

[0016] Optionally, multiple dual-color light-emitting elements are separately disposed on the circuit board, and the hemispherical recessed structure of the top cover is provided with a light guide surface corresponding to the position of the dual-color light-emitting element, with the dual-color light-emitting element protruding from the surface of the light guide surface.

[0017] By adopting the above technical solution, using separately set dual-color light-emitting elements, it is easier to achieve light scattering. The light is guided to the ring display area through the light guide surface at the hemispherical recessed structure of the top cover, achieving a ring display effect. Moreover, the light-emitting elements are not visible when not powered on, which increases the aesthetics. At the same time, it avoids the problem of light spots, eliminates the need for additional light guide columns and cover films, simplifies the structure, and reduces the difficulty of production and manufacturing.

[0018] Optionally, the wire output socket of the base is equipped with a foolproof measure, that is, the interfaces with different output functions are respectively equipped with sockets of different sizes and shapes, and are equipped with limit slots.

[0019] By adopting the above technical solution, the situation of plugging different output function wires into the wrong interface can be avoided, and the wire connection is stable and not easy to fall off, which meets safety requirements and facilitates the replacement of wires.

[0020] Optionally, a positioning block is provided in the cable outlet groove on the back of the base, and the positioning block and the outline of the cable outlet groove fix the wire according to the preset cable outlet direction.

[0021] By adopting the above technical solution, the positioning block and the outline of the cable outlet groove in the back of the base can be used to fix the wire according to the preset cable outlet direction, realize the adjustment of the cable output direction, facilitate the wiring according to the site requirements, and make the wiring neater and more beautiful.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. The air intake channel is integrated with the ring display and buttons, reducing the complexity of mold design, improving the aesthetics of the product, and allowing the external gas being measured to act on the sensor without obstruction, thereby improving the gas response time and directionality performance of the sensor. 2. The annular gap between the disc and the top cover is used to achieve both display and air intake effects, which increases the light-emitting area and viewing angle, enhances the visual aesthetics, and provides uniform brightness. At the same time, the annular air intake channel allows gas from all angles to directly act on the sensor. 3. The wire output direction is adjustable. The wire direction can be adjusted through the wire outlet groove on the back of the base to meet the installation requirements of different customers, making the wiring neat. The wire interface adopts a pluggable connection, which is convenient for replacement. It also has a foolproof locking measure to ensure stable and reliable connection, and meets the needs of replacing wires of different lengths and plug types (the plug at the other end of the wire connected to the alarm). Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application; Figure 2 This is a schematic diagram of the exploded structure of this application; Figure 3 This is a schematic diagram showing the structure on the back of the disc.

[0024] In the diagram, 1. Outer shell; 11. Base; 111. Cable outlet; 12. Top cover; 121. Cavity support; 122. Cantilever support; 13. Disc; 131. Protrusion; 14. Circular display area; 2. Circuit board; 21. Socket; 22. Button; 3. Sensor; 4. Dual-color light-emitting element; 5. Snap-fit ​​structure; 51. Bayonet; 52. Barb; 53. Support block; 6. Comb-shaped support; 7. Mounting plate. Detailed Implementation

[0025] The following is in conjunction with the appendix Figures 1-3 This application will be described in further detail.

[0026] This application discloses a household gas alarm.

[0027] refer to Figure 1A household gas alarm includes a housing 1, a circuit board 2, and wires. The housing 1 consists of a base 11, a top cover 12, and a disc 13. The base 11 and the top cover 12 are detachably connected by screws. Ventilation holes are provided around the back of the base 11 for heat dissipation, air intake, and alarm sound output. The base 11 and the top cover 12 are vertically arranged. The middle part of the top cover 12 has a hemispherical recessed structure. The disc 13 is detachably connected to the hemispherical recessed structure of the top cover 12. The outer diameter of the disc 13 is smaller than the diameter of the hemispherical recessed structure of the top cover 12, so the hemispherical recessed structure and the circumferential edge of the disc 13 form an annular gap of about 3mm, which is the annular display area 14. The annular display area 14 also serves as a gas intake channel.

[0028] refer to Figure 1 and Figure 2 The base 11 and the top cover 12 are vertically arranged. The back of the base 11 is independently provided with a mounting plate 7, which is rotatably snapped onto the base 11. When installing and using the outer shell 1, the mounting plate 7 is first fixed to the wall with expansion bolts. Then the outer shell 1 and the mounting plate 7 are rotatably snapped together, which makes it easy to adjust the overall verticality of the outer shell 1 and to fit it against the wall.

[0029] Circuit board 2 is mounted inside base 11 and parallel to the back of base 11. Sensor 3 is fixedly connected to the center of circuit board 2. Three dual-color light-emitting elements 4 are separately arranged around sensor 3. The dual-color light-emitting elements 4 are generally red and green, but under the control of microprocessor, they can produce yellow to meet relevant requirements. The three dual-color light-emitting elements 4 are arranged in an equilateral triangle around sensor 3, with one dual-color element positioned directly above sensor 3. The hemispherical recessed structure of the upper cover 12 has a light guide surface corresponding to the position of the dual-color light-emitting elements 4. The dual-color light-emitting elements 4 protrude from the surface of the light guide surface and are simultaneously covered by disk 13. The light guide surface, i.e., the surface of the hemispherical recessed structure of the upper cover 12, is processed by molding to easily produce diffuse reflection, so that the light emitted by the light-emitting elements 4 is reflected or scattered into the annular display area.

[0030] The light from the dual-color light-emitting element 4 shines through the annular display area 14, making its light appear as a ring. This increases the light-emitting area, improves visual appeal, and ensures uniform brightness. The annular gap is unobstructed and also serves as the air intake channel for the gas sensor 3, thus simultaneously achieving the dual purposes of light emission and air intake. Furthermore, this annular air intake channel is unobstructed at all angles from the air intake port of the sensor 3, ensuring that gas from different angles is directly applied to the air intake end of the sensor 3. This reduces the impact of different air intake angles on the sensor 3's response, improving the gas sensor 3's response time and directional performance.

[0031] refer to Figure 2 and Figure 3Three sets of snap-fit ​​structures 5 are fixed on the disc 13. The three sets of snap-fit ​​structures 5 are respectively set on the upper end and left and right sides of the sensor 3. A cavity support 121 is correspondingly set in the hemispherical recess of the upper cover 12. The snap-fit ​​structure 5 includes a latch 51 and a barb 52. The snap-fit ​​structure 5 itself has a certain elasticity, which can generate a certain deformation. Support blocks 53 are fixed on the two sides of the snap-fit ​​structure 5 perpendicular to its own length. The support blocks 53 are connected to the snap-fit ​​structure 5 at a 90-degree angle. The support blocks 53 are also fixed to the bottom of the disc 13.

[0032] When installing the snap-fit ​​structure 5 and the cavity support column 121, the snap-fit ​​structure 5 is inserted into the cavity support column 121. The beveled surface of the hook 52 causes the inner wall of the cavity support column 121 to press the hook 52 until the hook 52 passes through the cavity support column 121. The hook 52 then returns to its original shape, and the hook 52 and the cavity support column 121 are locked in place. When it is necessary to remove the disc 13, simply remove the top cover 12, press the hook 52 by hand or with a tool to deform it, until the hook 52 and the cavity support column 121 are released from their locked position. This completes the connection between the snap-fit ​​structure 5 and the cavity support column 121, allowing the disc 13 to be lifted and removed.

[0033] refer to Figure 2 and Figure 3 A cantilever support 122 is provided on the upper cover 12, located at the lower end of the sensor 3. The cantilever support 122 is spaced apart from the cavity support 121, and passes through the upper cover 12, abutting against the button 22 on the circuit board 2. A protrusion 131 is fixed on the back of the disc 13 at the corresponding position of the cantilever support 122, and the protrusion 131 abuts against the cantilever support 122. The back of the protrusion 131 is the front of the disc 13, and text markings, such as "self-test," are set at the corresponding positions of the protrusion 131. Pressing the markings on the disc 13 will cause the protrusion 131 to abut against the cantilever support 122, thus triggering the button 22. This design is not only aesthetically pleasing but also increases the button area.

[0034] A comb-shaped support column 6 is fixed at the center of the back of the disc 13. The comb-shaped support column 6 includes multiple trapezoidal columns arranged at intervals. The comb-shaped support column 6 surrounds the sensor 3. When the disc 13 and the top cover 12 are installed, the ends of the comb-shaped support column 6 maintain a preset gap with the surface of the sensor 3. The spacing width of the comb-shaped support column 6 is adapted to the air inlet diameter of the sensor 3. The comb-shaped support column 6 can intercept particulate impurities and prevent impurities and garbage from entering through the annular display area 14 and affecting the use of the sensor 3. At the same time, the spacing gap of the comb-shaped support column 6 itself will not affect the gas entry.

[0035] refer to Figure 1 and Figure 2The base 11 of this alarm has two wire output sockets 21 at its bottom. The two wire output sockets 21 have different dimensions and pin spacing to prevent incorrect insertion of wires with different functions. The output sockets 21 have limiting slots to ensure the correct orientation of the inserted wires and to lock them in place. After the wire is inserted, a tool is needed to apply force to unlock the locking state, meeting safety requirements. The alarm's conventional output wires correspond to a power cord and a linkage output wire, which have relevant standard technical requirements and must be compatible with the plugs that mate with the output sockets 21 of the base 11. These wires are not shown in the accompanying drawings of this application.

[0036] The output cable features a detachable design, allowing for the production of predetermined lengths or plug types (the plug at the other end of the cable connecting to socket 21 on circuit board 2) according to user requirements. This facilitates the independent production of the alarm and cable, which can then be packaged together, enabling streamlined production and manufacturing, improving work efficiency, and increasing inventory flexibility.

[0037] refer to Figure 1 and Figure 2 Two through holes are provided at the top bottom of the base 11 for wires to pass through. A wire outlet groove 111 is provided on the back of the base 11 for adjusting the direction of the wires. If the wires need to be connected from the bottom outwards, the wires do not need to pass through the wire outlet groove 111. If the wires need to be connected from the top of the base 11 outwards, the two sets of wires extending from the base 11 need to be bent towards the back of the outer casing and converge upwards through the "V"-shaped wire outlet groove 111 at the bottom of the base 11. The width of the top of the wire outlet groove 111 is wider than the width of the two branch paths at the bottom. Positioning blocks are also provided at intervals in the wire outlet groove 111. The positioning blocks and the outline of the wire outlet groove 111 can limit and fix the wires, thereby changing the output direction of the wires.

[0038] The implementation principle of a household gas alarm according to an embodiment of this application is as follows: This household gas alarm integrates the gas intake channel with a ring display and buttons. Three dual-color light-emitting elements 4 form a large aperture, increasing the luminous area and viewing angle, thus enhancing visual appeal. Simultaneously, the ring display area 14 also serves as the gas intake channel, making the product simpler, reducing mold manufacturing complexity, improving production efficiency, and also improving the gas response performance of the sensor 3. The increased button area makes operation more convenient. The wires use a pluggable connection, with foolproof measures ensuring stable and reliable connections and easy replacement of wires for different needs. The base 11 has a wire outlet groove 111 to change the wire output direction, meeting the installation needs of different customers. The overall structural design simplifies mold construction, facilitates assembly, improves production and assembly efficiency, and meets modern aesthetic and market demands.

[0039] The circuit designs in this application are all mature designs. Using this structure, the corresponding circuits can be accommodated to realize the function of the gas alarm. Therefore, the circuits and circuit boards will not be described in detail.

[0040] The embodiments described in this specific implementation are 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 household gas alarm, characterized in that: Includes a housing (1), a circuit board (2), and wires. The housing (1) consists of a base (11), a top cover (12), and a disc (13). The base (11) and the top cover (12) are detachably connected. The middle part of the top cover (12) is provided with a hemispherical recessed structure. The disc (13) is detachably connected to the hemispherical recessed structure of the top cover (12). The hemispherical recessed structure and the circumferential edge of the disc (13) form an annular display area (14). The annular gap formed between the disc (13) and the top cover (12) also serves as a gas intake passage. The circuit board (2) is installed in the base (11), and a sensor (3) is set in the center. Three dual-color light-emitting elements (4) are arranged around the sensor (3). The dual-color light-emitting elements (4) and the sensor (3) both pass through the hemispherical recessed structure of the top cover (12) and are covered by the disc (13). The wires are detachably connected to the circuit board (2). A socket (21) for assembling wires is opened at the bottom of the base (11), and a wire outlet groove (111) for adjusting the direction of the wires is provided on the back of the base (11).

2. A household gas alarm according to claim 1, characterized in that: Three sets of snap-fit ​​structures (5) are fixed on the disc (13). The three sets of snap-fit ​​structures (5) are spaced apart along the circumference of the disc (13). The snap-fit ​​structure (5) includes a snap-fit ​​opening (51) and a barb (52). The hemispherical recess of the cover (12) is provided with multiple sets of cavity support pillars (121) for detachable connection with the snap-fit ​​structure (5).

3. A household gas alarm according to claim 2, characterized in that: The snap-fit ​​structure (5) has support blocks (53) fixed on both sides, and the support blocks (53) are also fixed to the bottom of the disc (13).

4. A household gas alarm according to claim 2, characterized in that: The bottom of the disc (13) is provided with a protrusion (131), and the protrusion (131) is spaced apart from the snap-on structure (5). The upper cover (12) is provided with a cantilever support (122) at the position corresponding to the protrusion (131). The cantilever support (122) passes through the upper cover (12) and abuts against the button (22) provided on the circuit board (2). When the protrusion (131) presses the cantilever support (122), the button (22) can be triggered.

5. A household gas alarm according to claim 1, characterized in that: The inner wall of the disc (13) is provided with annular comb-shaped support columns (6) at intervals in the middle. The ends of the comb-shaped support columns (6) maintain a preset gap with the surface of the sensor (3). The spacing width of the comb-shaped support columns (6) is adapted to the air inlet diameter of the sensor (3).

6. A household gas alarm according to claim 1, characterized in that: Multiple dual-color light-emitting elements (4) are separately disposed on the circuit board (2). The hemispherical recessed structure of the upper cover (12) is provided with a light guide surface corresponding to the position of the dual-color light-emitting element (4). The dual-color light-emitting element (4) is disposed protruding from the surface of the light guide surface.

7. A household gas alarm according to claim 1, characterized in that: The wire output socket (21) of the base (11) is equipped with a foolproof measure, that is, the interfaces with different output functions are respectively equipped with sockets (21) of different sizes and shapes.

8. A household gas alarm according to claim 1, characterized in that: A positioning block is provided in the cable outlet groove (111) on the back of the base (11). The positioning block and the outline of the cable outlet groove (111) fix the wire according to the preset cable outlet direction.

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