Key structure and circular electric energy meter

Abstract

The application provides a key structure, which comprises a support, a pressing rod and a sealing key. The support is used for being fixed on the upper cover of an electric energy meter. The pressing rod is rotatably and telescopically arranged on the support. The outer end of the pressing rod can be extended out of the support. The sealing key is arranged in the interior of the upper cover and is fixedly connected with the inner end of the pressing rod. The sealing key is formed with an eccentric protrusion. A plurality of function keys are arranged on the PCB in the electric energy meter. The plurality of function keys are arranged on the rotating circumferential track of the eccentric protrusion and can be pressed and contacted with the eccentric protrusion. The application also provides an electric energy meter, which comprises the key structure, an upper cover, a bottom box, a support, an inner container and a PCB. The support is arranged on the bottom box. The PCB is arranged on the support. The outer cover of the PCB is provided with the inner container. The bottom of the inner container is connected with the support. The upper cover is arranged outside the support and the inner container and is detachably connected with the bottom box. The application can realize the function that one pressing structure controls the pressing of a plurality of keys.

Description

Technical Field

[0001] This invention relates to the field of electricity meter technology, and in particular to a button structure and a circular electricity meter. Background Technology

[0002] An electricity meter is an instrument used to measure electrical energy; it is also called a kilowatt-hour meter, a power meter, or a kilowatt-hour meter, and refers to instruments that measure various electrical quantities. Currently, the button structure widely used in electricity meters is usually based on a single-button pressing mechanism. However, electricity meters sometimes require multiple buttons, such as query buttons and settlement buttons. Setting multiple buttons on an electricity meter not only requires more space but also affects the meter's appearance and waterproof function.

[0003] The invention disclosed in CN107765049A presents an ANSI standard round meter compatible with single-phase and three-phase relay schemes for energy meters. The second circuit board of this application has a programmable controller. A top rod is located directly above the programmable controller on the inner cover, and a programming button is located above the top rod on the outer cover. The programming button is connected to a toggle mechanism, which is rotatably mounted on a support of the outer cover. Although the programming button can be pressed by rotating the toggle mechanism and causing it to act on the top rod, the button structure corresponds one-to-one with the button itself. For multiple button requirements, multiple button structures must be set up, which not only wastes space in the energy meter but also affects the meter's appearance and waterproofing. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a button structure and a circular energy meter that enables a single pressing structure to control the pressing of multiple buttons.

[0005] To achieve the above objectives, the present invention provides a button structure, including a support, a pressing rod, and a sealing button. The support is fixed to the upper cover of the energy meter. The pressing rod is rotatably and telescopically inserted through the support, and the outer end of the pressing rod can extend out of the support. The sealing button is located inside the upper cover and is fixedly connected to the inner end of the pressing rod. An eccentric protrusion is formed on the sealing button. Multiple function buttons are provided on the PCB inside the energy meter. The multiple function buttons are located on the rotational circumference trajectory of the eccentric protrusion and can be pressed into contact with the eccentric protrusion.

[0006] In this invention, the support provides a mounting base for the pressing rod. Since the outer end of the pressing rod extends out of the support, the user can rotate the pressing rod within the support or move it inward by operating the outer end of the pressing rod. Since a sealing button is fixedly connected to the inner end of the pressing rod, the sealing button can maintain the same movement state as the pressing rod inside the upper cover. When the pressing rod rotates a certain angle, the eccentric protrusion on the sealing button can rotate to the top of the corresponding function button. At this time, the pressing rod moves inward into the support, and the eccentric protrusion connects with the corresponding function button on the PCB, so that the circuit detects the pressing action and executes the function operation corresponding to the function button. Pulling the pressing rod upward releases the pressure on the function button on the PCB. Rotating the pressing rod to another angle and repeating the above operation can press multiple function buttons on the PCB, thereby achieving the effect of one button structure completing multiple buttons.

[0007] Optionally, the sealing button includes a button body and a connecting column. A mounting hole is provided on the top wall of the upper cover corresponding to the inner cavity of the support. The connecting column passes through the mounting hole and can move axially and rotate circumferentially. The button body is fixedly connected to the inner end of the connecting column and can be sealed to the mounting hole. The eccentric protrusion is formed at the eccentric position of the button body. The outer end of the connecting column is connected to the inner end of the pressing rod.

[0008] In this invention, the button body can seal the top cover. When the pressing rod is pulled outward to move the connecting column and the button body, the button body can be sealed and attached to the inner wall of the top cover, preventing dust or moisture from entering the top cover through the support and affecting the circuit.

[0009] Optionally, an installation channel is vertically formed inside the support. Multiple limiting grooves are vertically formed on the side wall of the installation channel. The multiple limiting grooves are spaced apart circumferentially along the installation channel and extend upward to the top surface of the support. The connecting column is axially movable and circumferentially rotatable within the installation channel. The side of the pressing rod is formed with a limiting protrusion. When the pressing rod moves into the support, the limiting protrusion can slide and engage with the limiting groove. The eccentric protrusion corresponds to the position of the function button.

[0010] In this invention, a vertically penetrating installation channel is created within the support, allowing the connecting column to drive the pressing rod to move along the axial direction within the installation channel. Multiple limiting grooves are created on the side wall of the installation channel, while limiting protrusions are provided on the side of the pressing rod. Only when the limiting protrusion on the side of the pressing rod rotates to the position corresponding to the limiting groove, the pressing rod is subjected to a force inward towards the support, allowing the limiting protrusion to move inward along the limiting groove. This allows the pressing rod to move smoothly into the support, at which point the eccentric protrusion is aligned with the function button on the PCB and applies a pressing action to the function button. When the position of the limiting protrusion does not correspond to the limiting groove, even if the pressing rod is subjected to a force inward towards the support, the pressing rod cannot move inward because the limiting protrusion is stuck at the top of the support. In this case, the eccentric protrusion does not correspond to the position of the function button on the PCB, and no pressing effect is produced. This not only allows for pressing multiple buttons but also prevents accidental pressing of the function button on the PCB due to accidental activation of the pressing rod.

[0011] Optionally, the limiting protrusion and the eccentric protrusion may point in the same or opposite directions.

[0012] In this invention, both the limiting protrusion and the eccentric protrusion are located on the side of the rotation center line of the pressing rod. Before pressing, the limiting protrusion is located outside the support, while the eccentric protrusion is located inside the top cover. By setting the directions of the limiting protrusion and the eccentric protrusion to be the same or opposite, the orientation of the eccentric protrusion can be inferred by observing the direction of the limiting protrusion. Since different orientations of the eccentric protrusion correspond to different function buttons on the PCB, it is possible to conveniently press specific function buttons on the PCB.

[0013] Optionally, the top of the connecting column is provided with a through mounting groove, the inner end of the pressing rod extends into the mounting groove, and the pressing rod is rotatably connected to the mounting groove through a pin.

[0014] In this invention, an installation groove is formed through the top of the connecting column, so that the outer end of the connecting column is formed into two opposing arc-shaped blocks. The arc surfaces of the two arc-shaped blocks are far apart from each other and located on the cylindrical surface of the connecting column. The pin is inserted through the inner end of the pressing rod and its two ends are rotatably connected to the sides of the two arc-shaped blocks that are close to each other, so that rotating the pressing rod can drive the connecting column to rotate synchronously through the pin. Pressing or pulling the pressing rod can drive the connecting column to move synchronously along its axial direction through the pin. Moreover, the pressing rod can also swing around the pin between the two arc-shaped blocks.

[0015] Optionally, the support has a lead seal groove with its top open, and a first lead seal hole is formed on the side wall of the support corresponding to the lead seal groove. The pressing rod has a second lead seal hole and can rotate around the pin into the lead seal groove until the second lead seal hole and the first lead seal hole coincide.

[0016] In this invention, when the pressing rod rotates from a vertical to a horizontal state around the pin between the two arc-shaped blocks, the lead seal groove on the support can accommodate the pressing rod when it rotates to the horizontal position. At this time, the second lead seal hole on the pressing rod coincides with the first lead seal hole on the support. By inserting the lead seal into the first and second lead seal holes, the position of the pressing rod can be locked, preventing the pressing rod from being opened arbitrarily to press the function buttons on the PCB.

[0017] Optionally, the button structure further includes multiple sets of pressure transmission rods and elastic seats corresponding one-to-one with the multiple function buttons. The elastic seats are used to be mounted on the inner shell of the energy meter. The inner end of the pressure transmission rod passes through the inner shell and abuts against the rebound part of the elastic seat. The outer end of the pressure transmission rod extends out of the inner shell and can abut against the eccentric protrusion. The rebound part of the elastic seat can contact the function buttons of the PCB.

[0018] In this invention, the pressure transmission rod transmits the downward pressure of the eccentric protrusion to the elastic seat. Under the downward pressure of the pressure transmission rod, the elastic seat undergoes elastic deformation, and the function buttons on the PCB are pressed, thereby enabling the corresponding button operations.

[0019] Optionally, the pressing rod can be in the shape of a sheet or a rod. In this invention, the sheet-shaped or rod-shaped pressing rod can better cooperate with the mounting channel and multiple limiting grooves on the support, making the operation of the pressing rod for button operation smoother.

[0020] The present invention also provides an electricity meter, including the above-mentioned button structure, as well as a top cover, a bottom box, a bracket, an inner liner and a PCB. The bracket is disposed on the bottom box, the PCB is disposed on the bracket, the inner liner is covered by the PCB, the bottom of the inner liner is connected to the bracket, and the top cover is disposed on the bracket and the inner liner and is detachably connected to the bottom box.

[0021] In this invention, a single button structure is set on the energy meter to achieve the effect of pressing multiple buttons. Compared with the traditional energy meter design that sets multiple button structures to meet the needs of multiple buttons, the space occupied by the button structure is reduced, and the appearance of the energy meter is more beautiful and simple. The water-proof effect of the energy meter can be achieved by only meeting the waterproof requirements at one button structure.

[0022] Optionally, the top cover is made of a transparent material. In this invention, making the top cover transparent allows the user to visually see the alignment of the eccentric protrusion inside the top cover with different function buttons when operating the press lever. This enables the user to quickly determine the different function buttons on the PCB corresponding to different positions of the press lever, thus realizing different button functions.

[0023] Beneficial effects:

[0024] 1. This invention drives the sealing button to rotate by rotating the pressing rod. The eccentric protrusion on the sealing button can rotate to be above different function buttons. When the pressing rod applies a pressing action, the eccentric protrusion can transmit the downward pressure to the function button position on the PCB, realizing the effect of pressing multiple function buttons on the PCB with one button structure.

[0025] 2. Compared to the traditional electricity meter's single-button structure with a single function button design, this invention can enrich the electricity meter's button functions. Compared to the traditional electricity meter's multiple-button structure with multiple function buttons design, this invention ensures that the electricity meter has multiple functions while saving the electricity meter's internal usable space, making the electricity meter's internal structure simpler and providing more usable space.

[0026] 3. Compared to the traditional design of multiple buttons on the outside of the electricity meter, the single button structure of the present invention makes the electricity meter more aesthetically pleasing, while avoiding the need to design waterproof structures for multiple button structures, thus improving the waterproof performance of the electricity meter. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0028] Figure 1 This is a partial structural schematic diagram of a circular energy meter disclosed in this invention;

[0029] Figure 2 This is a schematic diagram of a button structure and a partial structure of a circular energy meter disclosed in this invention.

[0030] Figure 3 This is a partial cross-sectional view of a circular energy meter disclosed in this invention.

[0031] Figure label:

[0032] 1. Support; 11. Limiting groove; 12. Lead seal groove; 13. First lead seal hole; 2. Pressing rod; 21. Limiting protrusion; 22. Second lead seal hole; 3. Sealing button; 31. Eccentric protrusion; 32. Button body; 33. Connecting column; 4. Pressure transmission rod; 5. Elastic seat; 6. Top cover; 7. PCB; 8. Inner liner; 81. Sleeve.

[0033] The realization of the objective, functional characteristics and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0036] In the description of this invention, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0037] See Figure 1 and Figure 2 According to one aspect of the present invention, a button structure is provided, including a support 1, a pressing rod 2, and a sealing button 3. The support 1 is fixed on the upper cover 6 of an energy meter. The pressing rod 2 is rotatably and telescopically inserted through the support 1, and the outer end of the pressing rod 2 can extend out of the support 1. The sealing button 3 is disposed inside the upper cover 6 and fixedly connected to the inner end of the pressing rod 2. An eccentric protrusion 31 is formed on the sealing button 3. A plurality of function buttons are provided on the PCB 7 inside the energy meter. The plurality of function buttons are disposed on the rotational circumferential trajectory of the eccentric protrusion 31 and can be pressed into contact with the eccentric protrusion 31.

[0038] In this invention, the support 1 provides a mounting base for the pressing rod 2. Since the outer end of the pressing rod 2 extends out of the support 1, the user can rotate or move the pressing rod 2 inside the support 1 by operating the outer end of the pressing rod 2. Since the inner end of the pressing rod 2 is fixedly connected to the sealing button 3, the sealing button 3 can maintain the same movement state as the pressing rod 2 inside the upper cover 6. When the pressing rod 2 rotates at a certain angle, the eccentric protrusion 31 on the sealing button 3 can rotate to the top of the corresponding function button. At this time, the pressing rod 2 moves into the support 1, and the eccentric protrusion 31 connects with the corresponding function button on the PCB7, so that the circuit detects the pressing action and executes the function operation corresponding to the function button. Pulling the pressing rod 2 upward releases the pressing of the function button on the PCB7. Rotating the pressing rod 2 to another angle and repeating the above operation can press multiple function buttons on the PCB7, thereby achieving the effect of one button structure completing multiple buttons.

[0039] Specifically, the function buttons on PCB7 can be carbon film buttons, mechanical buttons, or micro switches. The type of function button is not specifically limited, as long as the circuit can detect the pressing action and execute the corresponding operation after the function button is pressed down by the eccentric protrusion 31. The pressing rod 2 is a lead-sealed pressing rod 2, which can provide lead-sealed locking to the energy meter. The shape and material of the pressing rod 2 are not specifically limited, as long as it can generate rotational movement and transmit downward pressure.

[0040] See Figure 2 In some embodiments of the present invention, the sealing button 3 includes a button body 32 and a connecting post 33. An installation hole is provided on the top wall of the upper cover 6 corresponding to the inner cavity of the support 1. The connecting post 33 passes through the installation hole and can move axially and rotate circumferentially. The button body 32 is fixedly connected to the inner end of the connecting post 33 and can be sealed to the installation hole. The eccentric protrusion 31 is formed at the eccentric position of the button body 32. The outer end of the connecting post 33 is connected to the inner end of the pressing rod 2.

[0041] In this invention, the button body 32 can seal the upper cover 6. When the pressing rod 2 is pulled outward to move the connecting column 33 and the button body 32, the button body 32 can be sealed and attached to the inner wall of the upper cover 6, preventing dust or moisture from entering the upper cover 6 through the support 1 and affecting the circuit.

[0042] Specifically, the eccentric protrusion 31 can be formed on the bottom or side of the button body 32. The position of the eccentric protrusion 31 on the button body 32 is not specifically limited, as long as the eccentric protrusion 31 can act on the corresponding function button when the button body 32 moves downward.

[0043] See Figure 1 and Figure 3 In some embodiments of the present invention, an installation channel is vertically opened in the support 1, and a plurality of limiting grooves 11 are vertically opened on the side wall of the installation channel. The plurality of limiting grooves 11 are spaced apart circumferentially along the installation channel and extend upward through the top surface of the support 1. The connecting column 33 is axially movable and circumferentially rotatable in the installation channel. The side of the pressing rod 2 is formed with a limiting protrusion 21. When the pressing rod 2 moves into the support 1, the limiting protrusion 21 can slide with the limiting groove 11, and the eccentric protrusion 31 corresponds to the position of the function button.

[0044] In this invention, a vertically penetrating installation channel is opened in the support 1 so that the connecting column 33 can drive the pressing rod 2 to move along the axial direction in the installation channel. Multiple limiting grooves 11 are opened on the side wall of the installation channel, and limiting protrusions 21 are provided on the side of the pressing rod 2. Only when the limiting protrusion 21 on the side of the pressing rod rotates to the position corresponding to the limiting groove 11, the pressing rod 2 is subjected to a force inward toward the support 1, and the limiting protrusion 21 can move inward along the limiting groove 11, so that the pressing rod can move smoothly into the support 1. At this time, the eccentric protrusion 31 is directly opposite the function button on the PCB 7 and applies a pressing action to the function button. When the position of the limiting protrusion 21 does not correspond to the position of the limiting groove 11, even if the pressing rod 2 is subjected to a force inward toward the support 1, the pressing rod 2 cannot move toward the support 1 because the limiting protrusion 21 is stuck at the top of the support 1. At this time, the position of the eccentric protrusion 31 does not correspond to the position of the function button on the PCB7, and the pressing effect cannot be produced. This not only allows multiple buttons to be pressed, but also avoids accidental pressing of the function button on the PCB7 by accidentally touching the pressing rod 2.

[0045] Specifically, the travel of the limiting protrusion 21 moving inward within the limiting groove 11 corresponds to the travel of the eccentric protrusion 31 and the function button, thus avoiding insufficient contact between the eccentric protrusion 31 and the function button or excessive pressing of the function button by the eccentric protrusion 31 when the pressing lever 2 is pressed down.

[0046] See Figure 2 and Figure 3 In some embodiments of the present invention, the limiting protrusion 21 and the eccentric protrusion 31 have the same or opposite orientation.

[0047] In this invention, the limiting protrusion 21 and the eccentric protrusion 31 are both located on the side of the rotation center line of the pressing rod 2. Before pressing, the limiting protrusion 21 is located outside the support 1, while the eccentric protrusion 31 is located inside the upper cover 6. By setting the directions of the limiting protrusion 21 and the eccentric protrusion 31 to be the same or opposite, the orientation of the eccentric protrusion 31 can be inferred by observing the direction of the limiting protrusion 21. Since different orientations of the eccentric protrusion 31 correspond to different function buttons on the PCB7, it is possible to conveniently press specific function buttons on the PCB7.

[0048] See Figure 2 In some embodiments of the present invention, the top of the connecting column 33 is provided with a through mounting groove, the inner end of the pressing rod 2 extends into the mounting groove, and the pressing rod 2 is rotatably connected to the mounting groove by a pin.

[0049] In this invention, an installation groove is formed through the top of the connecting column 33, so that the outer end of the connecting column 33 is formed into two opposing arc-shaped blocks. The arc surfaces of the two arc-shaped blocks are far apart from each other and located on the cylindrical surface of the connecting column 33. The pin is inserted through the inner end of the pressing rod 2 and its two ends are rotatably connected to the sides of the two arc-shaped blocks that are close to each other, so that rotating the pressing rod 2 can drive the connecting column 33 to rotate synchronously through the pin. Pressing or pulling the pressing rod 2 can drive the connecting column 33 to move synchronously along its axial direction through the pin. Moreover, the pressing rod 2 can also swing around the pin between the two arc-shaped blocks.

[0050] See Figure 1 In some embodiments of the present invention, the support 1 is provided with a lead seal groove 12, the top of the lead seal groove 12 is through, the side wall of the support 1 is provided with a first lead seal hole 13 corresponding to the lead seal groove 12, the pressing rod 2 is provided with a second lead seal hole 22, and the pressing rod 2 can rotate around the pin into the lead seal groove 12 until the second lead seal hole 22 coincides with the position of the first lead seal hole 13.

[0051] In this invention, when the pressing rod 2 rotates from a vertical to a horizontal state around the pin between the two arc-shaped blocks, the lead seal groove 12 opened on the support 1 can accommodate the pressing rod 2 when it rotates to the horizontal state. At this time, the second lead seal hole 22 on the pressing rod 2 coincides with the first lead seal hole 13 on the support 1. By inserting the lead seal into the first lead seal hole 13 and the second lead seal hole 22, the position of the pressing rod 2 can be locked, preventing the pressing rod 2 from being opened at will and the function button on the PCB7 from being pressed.

[0052] See Figure 2 and Figure 3In some embodiments of the present invention, the button structure further includes multiple sets of pressure transmission rods 4 and elastic seats 5 corresponding one-to-one with the multiple function buttons. The elastic seats 5 are used to be disposed on the inner liner 8 of the energy meter. The inner end of the pressure transmission rod 4 passes through the inner liner 8 and abuts against the rebound portion of the elastic seat 5. The outer end of the pressure transmission rod 4 extends out of the inner liner 8 and can abut against the eccentric protrusion 31. The rebound portion of the elastic seat 5 can contact the function buttons of the PCB 7.

[0053] In this invention, the pressure transmission rod 4 transmits the downward pressure of the eccentric protrusion 31 to the elastic seat 5. The elastic seat 5 undergoes elastic deformation under the downward pressure of the pressure transmission rod 4, and the function buttons on the PCB7 are pressed, thereby enabling the corresponding button operations.

[0054] Specifically, the bottom of the inner liner 8 has multiple sleeves 81 formed above the multiple function buttons. Multiple elastic seats 5 are fixedly fitted onto the bottom of the sleeves 81 one-to-one. The rebound portion of the elastic seat 5 is located on the function button at the lower end of the sleeve 81. A pressure transmission rod 4 is movably disposed inside the sleeve 81. When the eccentric protrusion 31 is pressed down, the pressure transmission rod 4 moves downward within the sleeve 81, causing the rebound portion to deform under pressure and press the function button. When the pressure of the eccentric protrusion 31 on the pressure transmission rod 4 is released, the rebound portion recovers its elastic deformation, releases contact with the function button, and drives the pressure transmission rod 4 upward. The elastic seat 5 is a carbon film silicone button structure, possessing good heat resistance, cold resistance, environmental resistance, electrical insulation, and fatigue resistance, capable of meeting the pressing requirements of the function button. Of course, the invention is not limited to this; elastic seats 5 made of other materials that can meet the requirements of elastic deformation and rebound are also possible.

[0055] See Figure 1 In some embodiments of the present invention, the pressing rod 2 is in the shape of a sheet or a rod.

[0056] In this invention, the sheet-like or rod-like pressing rod 2 can better cooperate with the mounting channel and multiple limiting grooves 11 on the support 1, making the operation of the pressing rod 2 for button operation smoother.

[0057] See Figure 1 According to another aspect of the present invention, the present invention also provides a circular energy meter, including the above-described button structure, as well as an upper cover 6, a bottom box, a bracket, an inner liner 8, and a PCB 7. The bracket is disposed on the bottom box, the PCB 7 is disposed on the bracket, the inner liner 8 is covered by the PCB 7, the bottom of the inner liner 8 is connected to the bracket, and the upper cover 6 covers the bracket and the inner liner 8 and is detachably connected to the bottom box.

[0058] In this invention, a single button structure is set on the energy meter to achieve the effect of pressing multiple buttons. Compared with the traditional energy meter design that sets multiple button structures to meet the needs of multiple buttons, the space occupied by the button structure is reduced, and the appearance of the energy meter is more beautiful and simple. The water-proof effect of the energy meter can be achieved by only meeting the waterproof requirements at one button structure.

[0059] See Figure 1 In some embodiments of the present invention, the upper cover 6 is made of a transparent material.

[0060] In this invention, the top cover 6 is made of transparent material, which allows the user to see the docking status of the eccentric protrusion 31 inside the top cover 6 with different function buttons when operating the pressing rod 2. This allows the user to quickly determine the different function buttons on the PCB 7 corresponding to the pressing rod 2 when it is rotated to different positions, so as to realize different button functions.

[0061] When the invention is in operation, rotating the pressing rod 2 aligns its limiting protrusion 21 with the limiting groove 11. At this time, through the transparent top cover 6, it can be observed that the eccentric protrusion 31 and a specific function button on the PCB 7 are in the same vertical position. Applying downward pressure to the pressing rod 2 causes it to move towards the inside of the support 1. Simultaneously, the limiting protrusion 21 moves downward along the limiting groove 11. The downward pressure of the limiting protrusion 21 causes the pressure transmission rod 4 to move downward in the sleeve 81. The elastic resting part of the lower end of the pressure transmission rod 4 is compressed, causing elastic deformation and connecting with the function button on the PCB 7. This allows the circuit to detect the pressing action and execute the function operation corresponding to the function key. Pulling the pressing rod 2 upwards causes the elastic seat 5 to recover its elastic deformation, thereby releasing the pressing contact with the function key. When other function keys need to be pressed, the pressing rod 2 is rotated so that its limiting protrusion 21 corresponds to another limiting groove 11. By performing the same operation as above, different function keys can be pressed and connected. After the pressing operation is completed, the pressing rod 2 is pulled upwards so that the top surface of the key body 32 is attached to the inner wall of the upper cover 6 to prevent dust and moisture from entering the inside of the energy meter.

[0062] The above are merely preferred embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A button structure, characterized in that, The device includes a support (1), a pressing rod (2), and a sealing button (3). The support (1) is fixed to the upper cover (6) of the energy meter. The pressing rod (2) is rotatably and telescopically inserted into the support (1), and the outer end of the pressing rod (2) can extend out of the support (1). The sealing button (3) is located inside the upper cover (6) and is fixedly connected to the inner end of the pressing rod (2). An eccentric protrusion (31) is formed on the sealing button (3). Multiple function buttons are provided on the PCB (7) inside the energy meter, and the multiple function buttons are located on the circumference of the eccentric protrusion (31). The eccentric protrusion (31) can be pressed and contacted on the track; the sealed button (3) includes a button body (32) and a connecting column (33). The top wall of the upper cover (6) is provided with an installation hole corresponding to the inner cavity of the support (1). The connecting column (33) passes through the installation hole. The connecting column (33) can move axially and rotate circumferentially. The button body (32) is fixedly connected to the inner end of the connecting column (33) and can be sealed and connected to the installation hole. The eccentric protrusion (31) is formed at the eccentric position of the button body (32). The outer end of the connecting column (33) The inner end of the pressing rod (2) is connected; an installation channel is opened vertically through the support (1), and multiple limiting grooves (11) are vertically opened on the side wall of the installation channel. The multiple limiting grooves (11) are spaced apart circumferentially along the installation channel and extend upward through the top surface of the support (1). The connecting column (33) is axially movable and circumferentially rotatable in the installation channel. A limiting protrusion (21) is formed on the side of the pressing rod (2). When the pressing rod (2) moves into the support (1), the limiting protrusion (21) can slide with the limiting groove (11), and the... The eccentric protrusion (31) corresponds to the position of the function key; the key structure also includes multiple sets of pressure transmission rods (4) and elastic seats (5) corresponding one-to-one with the multiple function keys. The elastic seats (5) are used to be set on the inner shell (8) of the energy meter. The inner end of the pressure transmission rod (4) passes through the inner shell (8) and abuts against the spring part of the elastic seat (5). The outer end of the pressure transmission rod (4) extends out of the inner shell (8) and can abut against the eccentric protrusion (31). The spring part of the elastic seat (5) can contact and cooperate with the function keys of the PCB (7).

2. The button structure according to claim 1, characterized in that, The limiting protrusion (21) and the eccentric protrusion (31) point in the same or opposite directions.

3. The button structure according to claim 1, characterized in that, The top of the connecting column (33) is provided with a through-hole mounting groove, and the inner end of the pressing rod (2) extends into the mounting groove. The pressing rod (2) is rotatably connected to the mounting groove through a pin.

4. A button structure according to claim 3, characterized in that, The support (1) is provided with a lead seal groove (12), the top of the lead seal groove (12) is through, and a first lead seal hole (13) is provided on the side wall of the support (1) corresponding to the lead seal groove (12). A second lead seal hole (22) is provided on the pressing rod (2). The pressing rod (2) can rotate around the pin into the lead seal groove (12) until the second lead seal hole (22) coincides with the position of the first lead seal hole (13).

5. A button structure according to claim 1, characterized in that, The pressing rod (2) is in the shape of a sheet or a rod.

6. An electricity meter, characterized in that, The invention includes a button structure according to any one of claims 1 to 5, as well as a top cover (6), a bottom box, a bracket, an inner liner (8), and a PCB (7). The bracket is disposed on the bottom box, and the PCB (7) is disposed on the bracket. The inner liner (8) is covered by the PCB (7). The bottom of the inner liner (8) is connected to the bracket. The top cover (6) covers the bracket and the inner liner (8) and is detachably connected to the bottom box.

7. An electricity meter according to claim 6, characterized in that, The top cover (6) is made of transparent material.

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