Gas meter

Abstract

The utility model provides a gas meter, and relates to the technical field of detection. The gas meter comprises a meter body, a cover body, a base plate assembly, an anti-disassembly piece and a fixing piece. The meter body and the cover body are connected through a fixing piece, and the substrate assembly is arranged in a containing cavity defined by the meter body and the cover body and surrounded by the meter body and the cover plate. The anti-disassembly piece is pressed on the alarm switch and shields the fixing piece. If the base plate assembly needs to be detached, the cover body and the meter body need to be separated, correspondingly, the anti-detaching piece needs to be detached so that the fixing piece can be exposed and detached, the anti-detaching piece is not pressed on the alarm switch any more, the alarm switch can trigger an alarm signal, and therefore the situation that the meter body and the cover body are separated, and consequently the base plate assembly is exposed can be judged. The fixing frame is shielded by the anti-disassembly piece, so that the fixing piece can be stably and reliably connected to the meter body and the cover plate, the anti-disassembly structure of the gas meter is stable and reliable, and the anti-disassembly effect of the gas meter is better.

Description

Technical Field

[0001] This application relates to a gas meter, belonging to the field of detection technology. Background Technology

[0002] An ultrasonic gas meter is a gas meter developed based on the principle that the propagation speed of ultrasound in a flowing medium is equal to the vector sum of the average flow velocity of the measured medium and the velocity of the sound wave in a stationary medium. Ultrasonic gas meters have an internal circuit board structure. To prevent malicious damage and modification of the gas meter, an anti-tamper structure is required to prevent the disassembly of the internal circuit board structure.

[0003] Current gas meters lack reliable tamper-proof structures, resulting in a high risk of them being damaged or modified. Utility Model Content

[0004] This application provides a gas meter that solves the problem that the anti-tamper structure of gas meters in related technologies is not stable and reliable enough.

[0005] To achieve the above objectives, this application adopts the following technical solution:

[0006] This application provides a gas meter, including:

[0007] Surface;

[0008] A cover is detachably disposed on the watch body, and the cover and the watch body enclose a mounting cavity;

[0009] A base plate assembly, at least a portion of which is disposed in the mounting cavity and is surrounded within the body and the cover, the base plate assembly including an alarm switch;

[0010] A fastener is connected to the watch body and the cover to fix the watch body and the cover relative to each other;

[0011] An anti-tampering component is provided on the cover, the anti-tampering component is pressed against the alarm switch, and the anti-tampering component covers the fixing component to block the fixing component.

[0012] In some embodiments, the cover has a fixing hole, the fixing member passes through the fixing hole and connects to the watch body, and the anti-tampering member covers the end of the fixing member opposite to the watch body.

[0013] In some embodiments, the anti-tamper component includes a main body, a pressing part, and a surrounding part, wherein the pressing part is disposed on the main body and abuts against the alarm switch;

[0014] The surrounding edge is provided at the edge of the main body, and the cover also includes a retaining part, the surrounding edge being fastened to the retaining part.

[0015] In some embodiments, there are two pressing parts, both of which are symmetrically arranged along the center of the main body, and one of the pressing parts presses against the alarm switch.

[0016] In some embodiments, the cover has two snap-fit ​​grooves, the anti-tampering component includes two snap-fit ​​parts, the two snap-fit ​​parts are connected to both sides of the main body, the pressing part is located between the two snap-fit ​​parts, the two snap-fit ​​grooves are located on both sides of the fixing hole, and the two snap-fit ​​parts are respectively snapped into the two snap-fit ​​grooves.

[0017] In some embodiments, the gas meter further includes a cover plate, the cover plate including an upper cavity and a battery compartment, the cover plate being detachably connected to the cover plate to seal the upper cavity, at least a portion of the tamper protection element being disposed within the upper cavity, and the battery compartment being located within the upper cavity.

[0018] In some embodiments, the fastener passes through the substrate assembly.

[0019] In some embodiments, the substrate assembly further includes a circuit board, the alarm switch is disposed on and electrically connected to the circuit board, and the fixing member passes through the circuit board.

[0020] In some embodiments, the gas meter further includes a grounding element disposed on the meter body, and the circuit board is electrically connected to the grounding element.

[0021] In some embodiments, the substrate assembly further includes a conductive layer, the circuit board has a grounding via, the conductive layer is stacked on the circuit board and wrapped around the grounding via, the grounding member is in contact with the conductive layer, and the fixing member passes through the grounding via and is fixedly connected to the grounding member.

[0022] In the gas meter provided in this application, the base plate assembly is the control component of the gas meter, used to calculate the flow rate of gas passing through the gas meter. The base plate assembly is disposed within the mounting cavity formed by the meter body and cover, and is concealed by the meter body and cover, thus protecting the base plate assembly. A fastener connects the cover and meter body, allowing the cover to be fixed to the meter body. An anti-tampering component presses against the alarm switch and covers the fastener to obstruct it. If disassembling the base plate assembly requires separating the cover from the meter body, the fastener must be removed. This necessitates separating the anti-tampering component from the cover, exposing the fastener for removal. Consequently, the anti-tampering component is no longer pressed against the alarm switch, triggering an alarm signal. This indicates that the meter body and cover have separated, exposing the base plate assembly. This prevents unauthorized disassembly of the gas meter, ensuring its stable and reliable operation. The anti-tampering component presses the fixing component in place, ensuring that the fixing component can be stably and reliably connected to the meter body and cover plate. This makes the anti-tampering structure of the gas meter of this application stable and reliable, and improves the anti-tampering effect of the gas meter. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of a gas meter according to an embodiment of this application;

[0025] Figure 2 This is a cross-sectional schematic diagram of the internal structure of the gas meter according to an embodiment of this application;

[0026] Figure 3 This is a schematic diagram of a gas meter according to an embodiment of this application;

[0027] Figure 4 This is a schematic diagram showing the connection between the meter body and the cover of a gas meter according to an embodiment of this application;

[0028] Figure 5 This is a schematic diagram of the exploded structure of a gas meter according to an embodiment of this application;

[0029] Figure 6 This is a schematic diagram of the base plate assembly of a gas meter according to an embodiment of this application.

[0030] Explanation of reference numerals in the attached figures:

[0031] 100 - Meter body; 110 - Grounding component;

[0032] 200-Cover; 210-Snap-in slot; 220-Upper cavity; 230-Battery compartment; 240-Fixing hole; 250-Enclosure section;

[0033] 300 - Mounting cavity; 310 - First cavity; 320 - Second cavity;

[0034] 400 - Substrate assembly; 410 - Alarm switch; 420 - Circuit board; 421 - Grounding hole; 430 - Conductive layer;

[0035] 500 - Anti-disassembly component; 510 - Main body; 511 - Positioning hole; 520 - Snap-fit ​​part; 530 - Pressing part; 540 - Edge part;

[0036] 600 - Fastener;

[0037] 700 - Cover plate. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0039] An ultrasonic gas meter is a gas meter developed based on the principle that the propagation speed of ultrasound in a flowing medium is equal to the vector sum of the average flow velocity of the measured medium and the velocity of the sound wave in a stationary medium. Ultrasonic gas meters have an internal circuit board structure. To prevent malicious damage and modification of the gas meter, an anti-tamper structure is required to prevent the disassembly of the internal circuit board structure.

[0040] Current gas meters lack reliable tamper-proof structures, resulting in a high risk of them being damaged or modified.

[0041] In the gas meter proposed in this application, the base plate assembly is the control component of the gas meter, used to calculate the flow rate of gas passing through the gas meter. The base plate assembly is disposed within the mounting cavity formed by the meter body and cover, and is concealed by the meter body and cover, thus protecting the base plate assembly. A fastener connects the cover and meter body, allowing the cover to be fixed to the meter body. An anti-tampering component presses against the alarm switch and covers the fastener to obstruct it. If disassembling the base plate assembly requires separating the cover from the meter body, the fastener must be removed. This necessitates separating the anti-tampering component from the cover, exposing the fastener for removal. Consequently, the anti-tampering component is no longer pressed against the alarm switch, triggering an alarm signal. This indicates that the meter body and cover have separated, exposing the base plate assembly. This prevents unauthorized disassembly of the gas meter, ensuring its stable and reliable operation. The anti-tampering component presses the fixing component in place, ensuring that the fixing component can be stably and reliably connected to the meter body and cover plate. This makes the anti-tampering structure of the gas meter of this application stable and reliable, and improves the anti-tampering effect of the gas meter.

[0042] The gas meter provided in this application will be described in detail below with reference to specific embodiments.

[0043] This application discloses a gas meter, with reference to Figure 1 and Figure 2 As shown, it includes a watch body 100, a cover 200, a base plate assembly 400, an anti-tamper component 500, and a fastener 600.

[0044] The meter body 100 is the basic component of the gas meter of this application. The meter body 100 provides an installation base for at least some other components of the gas meter and serves to protect those components. The meter body 100 can be made of metallic materials, giving it better structural strength, thus improving its durability and reliability. Alternatively, some structures of the meter body 100 can be made of polymer materials, allowing it to maintain a certain structural strength while remaining relatively lightweight.

[0045] Metering components of the gas meter can be installed inside the meter body 100. Specifically, when the gas meter of this application is an ultrasonic gas meter, components such as transducers and converters can be installed inside the meter body 100.

[0046] The cover 200 is detachably connected to the watch body 100, and the cover 200 and the watch body 100 can enclose a mounting cavity 300, which is a cavity structure located between the cover 200 and the watch body 100. Specifically, the watch body 100 has a first cavity 310, and the cover 200 has a second cavity 320. The watch body 100 also has a first opening, which can be located on the surface of the watch body 100 and communicates with the first cavity 310, so that the external environment communicating with the first opening is also communicating with the first cavity 310. The cover 200 has a second opening, which can be located on the surface of the cover 200 and communicates with the second cavity 320, so that the external environment communicating with the second opening is also communicating with the second cavity 320. The first opening and the second opening are mated, thereby connecting the first cavity 310 and the second cavity 320 to form the mounting cavity 300.

[0047] At least a portion of the base plate assembly 400 is disposed within the mounting cavity 300. The base plate assembly 400 can be electrically connected to components such as transducers and converters within the meter body 100. After detecting the gas flow rate, the components within the meter body 100 generate an electrical signal and transmit it to the base plate assembly 400. The base plate assembly 400 can convert the signal into a specific flow rate value and display it. Specifically, a display screen can also be provided on the base plate assembly 400, through which the flow rate value can be displayed.

[0048] The substrate assembly 400 includes an alarm switch 410, which can be a push-button switch. When the alarm switch 410 is pressed, it will not trigger an alarm signal. When the alarm switch 410 is released, it will trigger an alarm signal.

[0049] The fastener 600 connects the cover 200 and the watch body 100, thereby fixing the cover 200 and the watch body 100 relatively together. Correspondingly, if it is necessary to disassemble the watch body 100 from the cover 200, the fastener 600 must be disassembled from at least one of the watch body 100 and the cover 200, thus allowing the watch body 100 and the cover 200 to be separated. The fastener 600 can fix the cover 200 and the watch body 100 relatively, and consequently, the cover 200 and the watch body 100 can be reliably connected as a single unit, forming a mounting cavity 300.

[0050] The tamper-evident component 500 is disposed on the cover 200. Specifically, the tamper-evident component 500 is detachably connected to the cover 200, and presses against the alarm switch 410 to prevent the alarm switch 410 from triggering an alarm signal. The tamper-evident component 500 also covers the fixing component 600, so that the tamper-evident component 500 blocks the fixing component 600. When it is necessary to remove the fixing component 600, the tamper-evident component 500 must be removed first to expose the fixing component 600 before the fixing component 600 can be removed.

[0051] If the base plate assembly 400 needs to be removed from the mounting cavity 300, the meter body 100 and the cover 200 must be disassembled. Accordingly, the anti-tamper component 500 must first be removed from the cover 200 to expose the fixing component 600. This removes the anti-tamper component 500 from the alarm switch 410, releasing and resetting the alarm switch 410, triggering an alarm signal. This indicates that the fixing component 600 has been disassembled, and that the meter body 100 has been separated from the cover 200, resulting in the exposure of the base plate assembly 400. This prevents unauthorized disassembly of the gas meter, ensuring its stable and reliable operation. The anti-tamper component 500 covers the fixing component 600, further protecting it and ensuring a reliable connection between the meter body 100 and the cover 200. Ultimately, this makes the anti-tamper structure of the gas meter in this application stable and reliable, resulting in better anti-tamper performance.

[0052] In some implementations, reference Figures 1 to 2 As shown, in order for the fastener 600 of this application to fix the watch body 100 and the cover 200, the cover 200 can have a fixing hole 240. The fastener 600 passes through the fixing hole 240 and is connected to the watch body 100. In this way, the fastener 600 is fixed to both the cover 200 and the watch body 100, thereby fixing the watch body 100 to the cover 200. Specifically, the watch body 100 can have a screw hole, and the fastener 600 can be a bolt structure. After passing through the fixing hole 240, the fastener 600 can be screwed into the screw hole of the watch body 100, thereby fixing the fastener 600 to the watch body 100. The bolt head at the end of the fastener 600 can abut against the cover 200, so that the fastener 600 presses the cover 200 onto the watch body 100, thereby fixing the watch body 100 to the cover 200.

[0053] The anti-tampering component 500 is placed on the end of the fixing component 600 that is away from the watch body 100, so that the anti-tampering component 500 can block the fixing component 600. Therefore, when the fixing component 600 needs to be removed, the anti-tampering component 500 needs to be removed accordingly.

[0054] In some implementations, reference Figures 2 to 3 As shown, the fastener 600 of this application is also disposed in the substrate assembly 400, so that the fastener 600 can fix the substrate assembly 400 relative to the face 100 and the cover 200, so that the substrate assembly 400 can be more stably disposed in the mounting cavity 300.

[0055] In some implementations, reference Figures 1 to 3As shown, the tamper-evident component 500 of this application can be fixed to the cover 200 by a snap-fit ​​mechanism, thus enabling a detachable connection between the tamper-evident component 500 and the cover 200. When manufacturing and assembling the gas meter of this application, the cover 200 and the tamper-evident component 500 can be manufactured separately and then fixed by a snap-fit ​​mechanism, thereby simplifying the manufacturing process of the gas meter. Furthermore, the snap-fit ​​connection between the tamper-evident component 500 and the cover 200 also facilitates easy assembly and disassembly of the tamper-evident component 500 and the cover 200.

[0056] In some implementations, reference Figures 1 to 3 As shown, in order to fix the tamper-proof component 500 to the cover 200 by snap-fit, the tamper-proof component 500 may be provided with multiple snap-fit ​​parts 520, and the cover 200 may be provided with multiple snap-fit ​​slots 210. The multiple snap-fit ​​parts 520 can be snapped into the multiple snap-fit ​​slots 210 respectively. In this way, the tamper-proof component 500 and the cover 200 are engaged by multiple snap-fit ​​parts 520 and snap-fit ​​slots 210, which makes the fixed connection between the tamper-proof component 500 and the cover 200 more stable and reliable.

[0057] Specifically, the number of latching parts 520 can be set to two, and the two latching parts 520 can be distributed on both sides of the tamper-evident component 500. Correspondingly, the number of latching slots 210 of the cover 200 is also set to two, so that the two latching parts 520 are respectively latched into the two latching slots 210. This makes the connection between the tamper-evident component 500 and the cover 200 more stable. The two latching slots 210 can be provided on both sides of the fixing hole 240.

[0058] In some implementations, reference Figures 2 to 4 As shown, the tamper-evident component 500 of this application may further include a main body 510 and a pressing part 530. The main body 510 is the main structure of the tamper-evident component 500, and can provide an mounting base for other components of the tamper-evident component 500. The main body 510 may be a strip-shaped structural component, and two snap-fit ​​parts 520 may be connected to both sides of the main body 510, thereby allowing the two snap-fit ​​parts 520 to be distributed on both sides of the tamper-evident component 500.

[0059] The pressing part 530 is connected to the main body 510 and is located between the two snap-fit ​​parts 520. The pressing part 530 is opposite to the alarm switch 410. When the anti-tampering part 500 presses down on the alarm switch 410, the pressing part 530 presses down on the alarm switch 410, so that the alarm switch 410 will not trigger the alarm signal.

[0060] In some implementations, reference Figure 2 and Figure 4As shown, to improve the effectiveness of the tamper-proof component 500 in covering and blocking the fixing component 600, the tamper-proof component 500 can have a positioning hole 511, located on the side of the tamper-proof component 500 facing the fixing component 600. When the fixing component 600 uses bolts, the side of the fixing component 600 away from the meter body 100 can be located in the positioning hole 511. Thus, when installing the tamper-proof component 500, the positioning hole 511 can be aligned with the fixing component 600 by moving the tamper-proof component 500, and the end of the fixing component 600 away from the meter body 100 can be inserted into the positioning hole 511. This determines the relative position of the tamper-proof component 500 and the fixing component 600, allowing the pressing part 530 to press against the alarm switch 410. Subsequently, the two snap-fit ​​parts 520 can be snapped into the two snap-fit ​​slots 210 of the cover 200, making the installation of the tamper-proof component 500 onto the cover 200 simple and convenient.

[0061] Specifically, the positioning hole 511 is provided on the main body 510, and the number of pressing parts 530 can be set to two. The two pressing parts 530 can be symmetrically arranged along the center of the positioning hole 511, and the two locking parts 520 can also be symmetrically arranged along the center of the positioning hole 511. In this way, when installing the anti-tampering component 500, as long as the two locking parts 520 can be locked into the two locking slots 210, one of the pressing parts 530 can be pressed against the alarm switch 410, making the process of installing the anti-tampering component 500 onto the cover 200 simple and convenient.

[0062] Specifically, the positioning hole 511 can be set at the center of the main body 510, and correspondingly, the two pressing parts 530 and the two snap-fit ​​parts 520 are symmetrically arranged along the center of the main body 510.

[0063] In some implementations, reference Figure 1 and Figure 4 As shown, the tamper-evident component 500 of this application may further include a perimeter portion 540, and the cover 200 may further include a barrier portion 250. The perimeter portion 540 is provided on the edge of the main body portion 510. Specifically, there are two perimeter portions 540, which are arranged opposite to each other. The perimeter portion 540 is fastened to the barrier portion 250, making the connection between the tamper-evident component 500 and the cover 200 more reliable, and also serving a positioning function when installing the tamper-evident component 500.

[0064] In some implementations, reference Figure 5As shown, the gas meter of this application may also include a cover plate 700, and the cover body 200 may include an upper cavity 220. The cover plate 700 is detachably disposed on the cover body 200 to seal the upper cavity 220, and at least part of the anti-tampering component 500 is disposed within the upper cavity 220. When the cover plate 700 is disposed on the cover body 200, the cover plate 700 can cover the anti-tampering component 500 within the upper cavity 220 of the cover body 200, thereby protecting the anti-tampering component 500 and preventing it from being exposed and damaged for a long time.

[0065] Specifically, the upper cavity 220 is an independent cavity within the cover 200. The upper cavity 220 and the mounting cavity 300 are independently set, but the upper cavity 220 and the mounting cavity 300 are connected. The entire anti-tamper component 500 can be set in the upper cavity 220. One end of the alarm switch 410 can extend into the upper cavity 220 through the opening between the upper cavity 220 and the mounting cavity 300. In this way, the anti-tamper component 500 in the upper cavity 220 can press against the alarm switch 410, so that the alarm switch 410 will not trigger an alarm signal.

[0066] In other embodiments, the alarm switch 410 may be located inside the mounting cavity 300, and the pressing part 530 of the anti-tampering member 500 may extend into the mounting cavity 300 through the opening between the upper cavity 220 and the mounting cavity 300. In this way, the pressing part 530 inside the mounting cavity 300 may press against the alarm switch 410, so that the alarm switch 410 will not trigger an alarm signal.

[0067] In some implementations, reference Figure 5 As shown, the cover 200 of this application may also be provided with a battery compartment 230, which can be used to install a battery. The battery can be electrically connected to the base plate assembly 400 and also to components inside the meter body 100, thereby enabling the battery to supply power to the gas meter of this application. In this way, the gas meter does not need an external power source, making the installation of the gas meter more convenient.

[0068] The battery compartment 230 can be disposed within the upper cavity 220 of the cover 200. When the battery needs to be replaced, the battery compartment 230 can be exposed simply by removing the cover 700 from the cover 200, allowing the battery inside the battery compartment 230 to be removed and a new battery to be installed in the battery compartment 230. This eliminates the need to remove the watch body 100 and the cover 200, avoiding the risk of exposing the substrate assembly 400.

[0069] Specifically, the anti-tampering component 500 can be set on one side of the battery compartment 230. The length direction of the anti-tampering component 500 can be set to be consistent with the length direction of the battery inside the battery compartment 230. This makes the structure of the anti-tampering component 500 and the battery more compact when they are set in the upper cavity 220, and thus the structure of the cover 200 can be more compact.

[0070] In some embodiments, to make the structure of the gas meter of this application more compact, the opening of the upper cavity 220 may be located on the side of the cover 200 facing away from the meter body 100. In this way, the cover 200 and the meter body 100 can be stacked, making the structure of the gas meter of this application more compact.

[0071] Specifically, both the cover 200 and the meter body 100 can be set as a rectangular structure, and the length and width of the cover 200 and the meter body 100 can be set to be similar. By stacking the cover 200 and the meter body 100, the size of the gas meter in one direction can be avoided, thus making the structure of the gas meter relatively compact.

[0072] In some implementations, reference Figure 1 and Figure 5 As shown, in order to make the watch body 100 and the cover 200 more reliably fixedly connected, the watch body 100 and the cover 200 of this application can also be provided with corresponding screw holes. By inserting bolts through the corresponding screw holes of the watch body 100 and the cover 200, the watch body 100 and the cover 200 can be fixed together, so as to make the connection between the watch body 100 and the cover 200 more reliable.

[0073] The screw holes of the cover 200 can be arranged circumferentially around the cover 200, and the screw holes of the watch body 100 can be arranged circumferentially around the watch body 100. Specifically, when the cover 200 and the watch body 100 have a rectangular structure, the screw holes of the cover 200 can be located at the corners of the cover 200, and correspondingly, the screw holes of the watch body 100 can be located at the corners of the watch body 100. This allows multiple circumferential parts of the cover 200 to connect with multiple circumferential parts of the watch body 100, thereby improving the reliability of the connection between the cover 200 and the watch body 100.

[0074] In addition, the cover plate 700 can also cover part of the screw holes of the cover body 200. The cover plate 700 can protect the bolts in the screw holes of the cover body 200, making the connection between the cover body 200 and the watch body 100 more stable and reliable.

[0075] In some implementations, reference Figure 3 and Figure 6 As shown, the substrate assembly 400 of this application may further include a circuit board 420, which is disposed within the mounting cavity 300. An alarm switch 410 is disposed on the circuit board 420 and is electrically connected to the circuit board 420. A fixing member 600 can be inserted through the circuit board 420, allowing the fixing member 600 to be inserted into the substrate assembly 400. The fixing member 600 serves to fix and limit the circuit board 420, making the structure of the substrate assembly 400 more stable when it is disposed within the mounting cavity 300.

[0076] Specifically, the thickness direction of the circuit board 420 is consistent with the direction from the meter body 100 to the cover 200, so that the meter body 100 and the cover 200 can be set closer together, thereby making the structure of the gas meter of this application more compact.

[0077] In some implementations, reference Figures 1 to 3 As shown, the gas meter of this application may also include a grounding component 110, which is disposed on the meter body 100 and electrically connected to the circuit board 420. When the gas meter is working, the static electricity generated on the circuit board 420 can be conducted to the meter body 100 through the grounding component 110, and then to the ground. This prevents the accumulation of static electricity during the operation of the gas meter from damaging the circuit board 420.

[0078] In some implementations, reference Figure 2 and Figure 6 As shown, the substrate assembly 400 of this application may also include a conductive layer 430, which is stacked on the circuit board 420. The grounding member 110 is in contact with the conductive layer 430, so that the static electricity generated on the circuit board 420 can be conducted to the grounding member 110 through the conductive layer 430.

[0079] To allow the fixing member 600 to pass through the substrate assembly 400, a grounding hole 421 is provided on the circuit board 420. The fixing member 600 can pass through the grounding hole 421 and be connected to the grounding member 110, so that the fixing member 600 can be fixedly connected to the body 100 through the grounding member 110. The conductive layer 430 is wrapped around the grounding hole 421, and one end of the grounding member 110 abuts against the conductive layer 430, so that the grounding member 110 can be electrically connected to the conductive layer 430.

[0080] Specifically, the grounding component 110 can be a columnar structure, and a screw hole is also provided inside the grounding component 110. The screw hole of the grounding component 110 mates with the fixing component 600. After passing through the grounding hole 421, the fixing component 600 can be screwed into the screw hole of the grounding component 110, so that the fixing component 600 is fixed to the grounding component 110, thereby fixing the fixing component 600 to the meter body 100.

[0081] The tamper-proof component 500 is pressed onto the alarm switch 410, so that the tamper-proof component 500 can also be pressed onto the circuit board 420, so that the conductive layer 430 on the circuit board 420 can maintain reliable contact with the grounding component 110, thereby making the gas meter of this application safer and more reliable.

[0082] It should be noted that the terms "one embodiment," "embodiment," "exemplary embodiment," "some embodiments," etc., mentioned in the specification indicate that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0083] Generally speaking, terms should be understood at least in part by their use in context. For example, at least in part by context, the term "one or more" as used in the text can be used to describe any feature, structure, or characteristic of the singular meaning, or a combination of features, structures, or characteristics of the plural meaning. Similarly, at least in part by context, terms such as "a" or "the" can also be understood to convey either singular or plural usage.

[0084] It should be readily understood that the terms “on,” “above,” and “on top of” in this application should be interpreted in the broadest possible sense, such that “on” means not only “directly on something” but also “on something” with an intermediate feature or layer therebetween, and that “above” or “on top of” means not only “on something” but also “on something” without an intermediate feature or layer therebetween (i.e., directly on something).

[0085] Furthermore, for ease of explanation, spatially relative terms such as "below," "below," "under," "above," and "above" may be used to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation other than those shown in the figures. The device may have other orientations (rotated 90° or in other orientations), and the spatially relative descriptive terms used herein may be interpreted accordingly.

[0086] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A gas meter, characterized in that, include: Table body (100); A cover (200) is detachably disposed on the watch body (100), and the cover (200) and the watch body (100) surround to form an installation cavity (300). A base plate assembly (400), at least a portion of which is disposed in the mounting cavity (300), and which is enclosed within the body (100) and the cover (200), the base plate assembly (400) including an alarm switch (410). A fastener (600) is connected to the watch body (100) and the cover (200) to fix the watch body (100) and the cover (200) relative to each other; An anti-disassembly component (500) is disposed on the cover (200), the anti-disassembly component (500) is pressed against the alarm switch (410), and the anti-disassembly component (500) covers the fixing component (600) to block the fixing component (600).

2. The gas meter according to claim 1, characterized in that, The cover (200) has a fixing hole (240), the fixing member (600) passes through the fixing hole (240) and is connected to the watch body (100), and the anti-disassembly member (500) covers the end of the fixing member (600) away from the watch body (100).

3. The gas meter according to claim 2, characterized in that, The anti-tampering component (500) includes a main body (510), a pressing part (530) and a surrounding part (540). The pressing part (530) is disposed on the main body (510) and abuts against the alarm switch (410). The edge portion (540) is disposed on the edge of the main body portion (510), and the cover (200) also includes a retaining portion (250), the edge portion (540) being fastened to the retaining portion (250).

4. The gas meter according to claim 3, characterized in that, There are two pressing parts (530), and both pressing parts (530) are symmetrically arranged along the center of the main body (510). One of the pressing parts (530) is pressed against the alarm switch (410).

5. The gas meter according to claim 4, characterized in that, The cover (200) has two snap-fit ​​grooves (210), and the anti-disassembly component (500) includes two snap-fit ​​parts (520). The two snap-fit ​​parts (520) are connected to both sides of the main body (510). The pressing part (530) is located between the two snap-fit ​​parts (520). The two snap-fit ​​grooves (210) are located on both sides of the fixing hole (240), and the two snap-fit ​​parts (520) are respectively snapped into the two snap-fit ​​grooves (210).

6. The gas meter according to claim 1, characterized in that, The gas meter also includes a cover plate (700), the cover body (200) includes an upper cavity (220) and a battery compartment (230), the cover plate (700) is detachably connected to the cover body (200) to seal the upper cavity (220), at least part of the anti-tampering component (500) is disposed in the upper cavity (220), and the battery compartment (230) is located in the upper cavity (220).

7. The gas meter according to any one of claims 1-6, characterized in that, The fastener (600) is inserted into the substrate assembly (400).

8. The gas meter according to claim 7, characterized in that, The substrate assembly (400) further includes a circuit board (420), the alarm switch (410) is disposed on the circuit board (420) and electrically connected to the circuit board (420), and the fastener (600) passes through the circuit board (420).

9. The gas meter according to claim 8, characterized in that, The gas meter also includes a grounding component (110), which is disposed on the meter body (100), and the circuit board (420) is electrically connected to the grounding component (110).

10. The gas meter according to claim 9, characterized in that, The substrate assembly (400) further includes a conductive layer (430), the circuit board (420) has a grounding hole (421), the conductive layer (430) is stacked on the circuit board (420) and the conductive layer (430) is wrapped around the grounding hole (421), the grounding member (110) is in contact with the conductive layer (430), and the fixing member (600) passes through the grounding hole (421) and is fixedly connected to the grounding member (110).

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