Intelligent electric energy meter

Abstract

The utility model belongs to the technical field of electric energy consumption monitoring, and discloses an intelligent electric energy meter. The electric energy meter comprises a box body, a sealing cover, a travel switch and an excitation assembly. The box body comprises a cavity for accommodating a circuit board; the sealing cover covers the box body and isolates the cavity from the outside. The travel switch is arranged on the side, close to the sealing cover, of the circuit board and comprises a movable contact, a static contact and an elastic piece, and the elastic piece comprises a fixed end and a movable end. The excitation assembly is arranged on the side, close to the circuit board, of the sealing cover and corresponds to the elastic piece, the excitation assembly comprises a piece pressing piece and a piece shifting piece which are arranged at an interval, and the piece shifting piece can move to the position below the movable end so that the piece pressing piece can press the movable end downwards; and the sheet pressing piece is separated from the movable end, and the sheet shifting piece can be propped against the movable end and drive the movable end to lift up. The intelligent electric energy meter can reduce the probability of misrecording caused by vibration or falling and the like, and avoids the phenomenon of misrecording caused by failure of the travel switch.

Description

Technical Field

[0001] The utility model relates to the technical field of power consumption monitoring, in particular to an intelligent electric energy meter. Background Art

[0002] An electric energy meter is a device used to measure and record the power consumption in a power system, also known as a watt-hour meter, kilowatt-hour meter. Electric energy meters are widely used in households, industries, and commercial places to accurately measure the power consumption and calculate the corresponding fees. And when in use, the electric energy meter is usually provided with an open cover detection function to prevent electricity theft by users and improve the safety of the electric energy meter.

[0003] In the prior art, the open cover detection of an electric energy meter usually uses a common push-button switch detection or a travel switch detection. When the cover is opened, the common push-button switch can trigger a signal when it is disengaged from the circuit board, with high detection sensitivity, but the travel is small, and false recording is likely to occur when there is vibration or dropping; to avoid false recording, there are also electric energy meters using travel switches to record the opening of the cover in the prior art. The travel switch has a large detection travel, and the travel switch generates a signal when the elastic piece flips under the action of its own elastic force recovery when the cover is opened. However, for an electric energy meter in a salt spray environment such as by the sea or in a chemical plant, the elastic piece is prone to rust due to environmental influence or its own elastic force decreases during long-term use, resulting in the phenomenon that it cannot flip. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an intelligent electric energy meter to reduce the probability of false recording caused by vibration, dropping, etc. of the electric energy meter and avoid the omission of recording caused by the failure of the travel switch.

[0005] To achieve the above object, the utility model adopts the following technical solutions:

[0006] An intelligent electric energy meter, comprising:

[0007] A box body, the box body includes a cavity for accommodating a circuit board;

[0008] A cover, the cover is arranged on the box body to isolate the cavity from the outside;

[0009] A travel switch, arranged on one side of the circuit board close to the cover, the travel switch includes a moving contact, a static contact and an elastic piece. The elastic piece includes a fixed end and a movable end. The fixed end is fixed on one side of the moving contact, and the movable end extends to the other side of the moving contact. The movement of the movable end can make the moving contact connect or disconnect from the static contact;

[0010] An excitation component is provided on a side of the cover close to the circuit board, and the excitation component is arranged corresponding to the spring piece. The excitation component includes a pressing piece and a paddle piece, and the pressing piece and the paddle piece are arranged at intervals. The paddle piece can be moved to the bottom of the movable end so that the pressing piece presses down the movable end; and the pressing piece is disengaged from the abutment with the movable end, and the paddle piece can abut against the movable end and drive the movable end to lift up.

[0011] Preferably, the excitation assembly also includes a support rod, one end of which is connected to the cover, and the other end extends toward the circuit board, the paddle member is arranged at the end of the support rod away from the cover, and the pressing member is arranged on the side of the paddle member close to the cover.

[0012] Preferably, the surface of the paddle member on the side away from the circuit board is a paddle surface, and the paddle surface is used to paddle the spring; the surface of the paddle member on the side close to the circuit board is a guide surface, and the guide surface extends from an end close to the circuit board to an end away from the circuit board, and is inclined toward the side close to the movable end.

[0013] Preferably, the paddle surface is inclined from an end close to the elastic sheet to an end away from the elastic sheet toward a direction close to the pressing member.

[0014] Preferably, the spring is located at an end of the travel switch away from the circuit board, and the movable end extends out of the circumference of the travel switch.

[0015] Preferably, the spacing distance between the pressing piece and the prying piece is less than or equal to the movement stroke required for the elastic piece to drive the movable contact to disconnect from the static contact.

[0016] Preferably, the paddle member abuts against the movable end and drives the movable end to move, so that the movement stroke of the travel switch generating the cover opening signal is 0.3-0.4 times the length of the spring from the fixed end to the movable end.

[0017] Preferably, the cover is hinged to the box body, and the travel switch is located at an end of the circuit board away from the hinge.

[0018] Preferably, the cover is hinged to the box body, and the travel switch is located at one end of the circuit board close to the hinge.

[0019] Preferably, the movable end is provided with a through-hole, and the paddle piece can slide into the through-hole so that the pressing piece abuts against the movable end and presses down the movable end; the pressing piece is disengaged from the abutment with the movable end, and the paddle piece can abut against the movable end and drive the movable end to lift up.

[0020] Beneficial effects:

[0021] The utility model provides a smart energy meter comprising a housing and a cover. The housing includes a cavity for accommodating a circuit board, and the cover is disposed on the housing to isolate the cavity from the outside world. The circuit board is electrically connected to a travel switch, and the cover is correspondingly provided with an excitation assembly comprising a pressing piece and a paddle piece. Compared with ordinary push-button switches, the detection stroke required for the travel switch is larger, which reduces the probability of false recording of the electricity meter due to vibration or falling. When the smart electricity meter is in use, the cover is arranged on the box body, and the pressing piece presses the spring piece so that the travel switch does not generate a cover opening signal. When the cover is opened, the pressing piece moves away from the spring piece, and the spring piece can rely on its own elasticity to make the movable end tilt up. When the spring piece tilts up, the moving contact and the static contact are disconnected, thereby generating a cover opening signal. If the spring piece cannot flip itself due to rust or reduced elasticity, then during the process of the cover being opened and away from the box body, the paddle piece will move away from the circuit board with the cover and then pry the spring piece. The movement of the spring piece drives the moving contact and the static contact in the travel switch to disconnect and generate a cover opening signal, thereby avoiding the omission phenomenon caused by the failure of the spring piece's own elastic force. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is an overall schematic diagram of the electric energy meter provided by the utility model;

[0023] Figure 2 This is a cross-sectional schematic diagram of the electric energy meter provided by the utility model when the cover is closed;

[0024] Figure 3 This is a cross-sectional schematic diagram of the electric energy meter provided by the utility model when the cover is opened and a cover-opening signal is generated;

[0025] Figure 4 This is a cross-sectional schematic diagram of the electric energy meter provided by the utility model when the cover is opened and the paddle member is separated from the spring;

[0026] Figure 5 The utility model is a cross-sectional schematic diagram of an electric energy meter in which a travel switch is located at one end of a circuit board close to a hinge.

[0027] In the figure:

[0028] 1-box body; 2-cover; 3-circuit board; 4-travel switch; 41-spring; 5-excitation assembly; 51-paddle piece; 52-pressing piece; 53-excitation rod. DETAILED DESCRIPTION

[0029] The present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that for the convenience of description, only the parts related to the present utility model rather than all the structures are shown in the drawings.

[0030] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0031] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath", and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or simply means that the horizontal height of the first feature is lower than that of the second feature.

[0032] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationships shown in the drawings. It is only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meanings.

[0033] Such as Figures 1-4As shown, this embodiment provides a smart electricity meter comprising a housing 1, a cover 2, a limit switch 4, and an activation assembly 5. The housing 1 includes a cavity for accommodating a circuit board 3. The cover 2 is mounted on the housing 1 and isolates the cavity from the outside world. The housing 1 also houses other functional components required for the smart electricity meter, and the cover 2 prevents these components from coming into contact with the outside world. The limit switch 4 is located on the side of the circuit board 3 near the cover 2. The limit switch 4 includes a moving contact, a stationary contact, and a spring 41. The spring 41 includes a fixed end and a movable end. The fixed end is fixed to one side of the moving contact, while the movable end extends toward the other side of the moving contact. Movement of the movable end connects or disconnects the moving contact with the stationary contact. In the absence of external force, the movable end tilts away from the moving contact, disconnecting the moving contact from the stationary contact. When an external force is applied, the movable end presses against the moving contact, causing the spring 41 to move the moving contact, thereby connecting the moving contact with the stationary contact. The limit switch 4 is electrically connected to the circuit board. When opening the cover 2, the movable end needs to move a certain distance to disconnect the moving contact from the static contact, so that the travel switch 4 generates the cover opening signal. The excitation assembly 5 is arranged on the side of the cover 2 close to the circuit board 3, and the excitation assembly 5 is arranged corresponding to the spring 41. The excitation assembly 5 includes a pressing piece 52 and a paddle piece 51. The pressing piece 52 and the paddle piece 51 are spaced apart. The paddle piece 51 can move below the movable end to allow the pressing piece 52 to press the movable end downward; the pressing piece 52 is separated from the movable end, and the paddle piece 51 can abut against the movable end and drive the movable end to move. The pressing piece 52 can apply pressure to the movable end in the direction of the moving contact, thereby causing the spring 41 to press the moving contact down, so that the moving contact is connected with the static contact. When connected, the travel switch 4 does not generate a cover opening signal; when the cover 2 is away from the box body 1, that is, when the smart electricity meter is opened, the cover 2 drives the pressing piece 52 to move, and the pressing piece 52 is disengaged from the movable end. The spring 41 can rely on its own elasticity to make the movable end tilt up. When the spring 41 tilts up, the moving contact and the static contact are disconnected, thereby generating a cover opening signal. If the spring 41 cannot flip itself due to rust or reduced elasticity, the paddle piece 51 will move away from the circuit board with the cover 2 during the process of opening and moving away from the box body 1, and then paddle the spring 41. The paddle piece 51 paddles the movable end to drive the moving contact to disconnect from the static contact. When disconnected, the travel switch 4 generates a cover opening signal, and other functional components in the smart electricity meter can respond to and record the cover opening signal. The limit switch 4 cooperates with the pressing piece 52 and the paddle piece 51 spaced apart from the pressing piece 52 to prevent the smart energy meter from mistakenly generating a cover opening signal due to vibration or falling, thereby causing a false record of the cover opening; the paddle piece 51 can move the spring piece 41 when the smart energy meter is opened, thereby preventing the spring piece 41 from being unable to flip due to rust or reduced elasticity and thus failing to generate a cover opening signal.

[0034] Specifically, the excitation assembly 5 also includes a support rod 53, one end of which is connected to the cover 2 and the other end extends toward the circuit board 3. The paddle member 51 is provided at the end of the support rod 53 away from the cover 2, and the pressing member 52 is provided on the side of the paddle member 51 close to the cover 2. When the smart electricity meter is operating normally, the cover is provided on the box body 1, the pressing member 52 is located on the side of the spring 41 away from the circuit board 3 and presses the spring 41, and the paddle member 51 is located on the side of the spring 41 close to the circuit board 3. When the smart electricity meter is opened, the pressing member 52 releases the pressure on the spring 41, and the paddle member 51 then paddles the spring 41. In other words, the cover 2 only needs to be provided with a support rod 53 to cooperate with the pressing member 52 and the paddle member 51 provided on the support rod 53 to complete the control of the spring 41.

[0035] In some other embodiments, the paddle member 51 can be separately arranged on the support rod 53, and the pressing member 52 can be separately arranged on the cover 2. The pressing member 52 can be a horizontal plate extending from the side wall, or a protrusion extending from the surface of the cover 2 toward the circuit board 3.

[0036] Furthermore, the side surface of the paddle member 51 away from the circuit board 3 is a paddle surface, which is used to paddle the spring 41, and the side surface of the paddle member 51 close to the circuit board 3 is a guide surface, which is inclined from the side close to the circuit board 3 to the end away from the circuit board 3 to the end close to the movable end. The paddle surface and the guide surface are transitioned by an arc surface. When the cover 2 is rotated and placed on the box body 1, the movable end first contacts the guide surface. As the cover continues to rotate, under the guidance of the guide surface, the movable end can be guided to the side of the paddle surface and gradually abut against the pressing member 52. The pressing member 52 presses down the movable end to connect the moving contact and the static contact. When the cover 2 is opened, as the cover 2 rotates in the opposite direction, the pressing member 52 disengages from the movable end and then abuts against the paddle surface, so that the paddle surface can then paddle the spring 41.

[0037] Furthermore, the paddle surface is inclined from the end closest to the spring plate 41 to the end further away from the spring plate 41, toward the pressing member 52. This inclined paddle surface ensures that as the cover 2 rotates away from the circuit board 3, the paddle surface and the movable end initially contact each other until the movable end and the paddle surface are released from contact, maintaining sufficient contact area between the paddle surface and the spring plate 41 to disconnect the movable contact from the stationary contact. In other embodiments, the paddle surface may also be parallel to the plane of the circuit board 3, which is not a limitation in this embodiment.

[0038] Furthermore, the spring piece 41 is located at the end of the travel switch 4 away from the circuit board 3, and the movable end extends out of the circumference of the travel switch 4. That is, the spring piece 41 has a sufficient length to leave enough movable space for the support rod 53. When the smart energy meter is working normally, the pressing piece 52 presses the spring piece 41 tightly against the end face of the travel switch 4. At this time, the paddle piece 51 can be extended between the spring piece 41 and the circuit board 3, so that the paddle piece 51 will trigger the travel switch 4 only after moving a certain distance, further avoiding the phenomenon of mis-recording when opening the cover. In the process of the cover 2 being covered on the box body 1, the paddle piece 51 passes through the spring piece 41 and extends to the bottom of the spring piece 41. At this time, the above-mentioned movable space plays a role in avoiding the paddle piece 51, and the pressing piece 52 can also be pressed down together with the paddle piece 51 to press the spring piece 41 tightly against the end face of the travel switch 4.

[0039] Furthermore, the distance between the pressing member 52 and the paddle member 51 is less than or equal to the travel distance required for the spring 41 to disconnect the movable contact from the stationary contact. The spring 41 is a thin sheet. When the pressing member 52 is pressed against the spring 41, the distance between the pressing member 52 and the paddle member 51 is close to the distance between the paddle member 51 and the spring 41. That is, when the cover 2 is closed, a certain distance must be left between the paddle member 51 and the spring 41. This distance should not be too small to ensure that the paddle member 51 can only pry the spring 41 when the cover 2 is opened to a certain extent. At the same time, this distance should not be too large to prevent the paddle member 51 from being unable to pry the spring 41 due to the excessive distance between the paddle member 51 and the spring 41.

[0040] Specifically, in this embodiment, the fixed end is flush with the end surface of the box body 1 near the cover 2. When the pressing member 52 compresses the spring plate 41, both the movable end and the fixed end of the spring plate 41 are flush with the aforementioned end surface. That is, when the spring plate 41 is compressed, it is flush with the aforementioned end surface. At this point, the limit switch 4 is as close to the cover 2 as possible, and the circuit board 3 can also be positioned closer to the cover 2, leaving more installation space within the box body 1. It also eliminates the need for an overly long support rod 53 on the cover 2 to reach the position of the limit switch 4. This also prevents the limit switch 4 from extending entirely out of the box body 1, ensuring that the box body 1 provides adequate protection for the limit switch 4.

[0041] Specifically, in this embodiment, the paddle member 51 abuts the movable end and drives the movable end to move, so that the movement stroke of the limit switch 4 to generate the cover opening signal is 0.3-0.4 times the length of the spring 41 from the fixed end to the movable end. That is, when the paddle member 51 drives the movable end to rise a distance 0.3-0.4 times the length of the spring 41, the moving contact of the limit switch 4 is disconnected from the static contact, and the limit switch 4 triggers the cover opening signal. The movement stroke required for the movable end to activate the limit switch 4 ensures that the limit switch 4 is not mistakenly activated due to vibration or falling, and avoids the required movement stroke being too large, so that the limit switch 4 cannot detect the cover opening signal when an outsider performs a small opening operation.

[0042] Specifically, the cover 2 is hingedly connected to the box body 1, and the limit switch 4 is located at the end of the circuit board 3 away from the hinge. The hinged connection between the two can be via a hinge, pin, or other structure, which is not limited in this embodiment. The trigger assembly 5 corresponding to the limit switch 4 is therefore also located at the end of the circuit board 3 away from the hinge. When the cover 2 is opened, the trigger assembly 5 has a sufficient rotation radius. Therefore, even a small rotation angle of the cover 2 can provide sufficient movement for the trigger assembly 5, preventing the limit switch 4 from detecting and generating a cover-opening signal when an outsider attempts to open the cover slightly.

[0043] Furthermore, in this embodiment, the smart energy meter is positioned horizontally, with the entire circuit board 3 located in the same horizontal plane. The limit switch 4 has a length of 12.8 mm and a height of 6.2 mm, and the length of the spring 41 is 18.1 mm. The contact length between the pressure element 52 and the movable end is 1.3 mm to ensure compression of the spring 41. When the lid 2 is opened and the angle formed between it and the box body 1 is 3°, the non-hinged end of the lid 2 is lifted to a height of 9.9 mm, the movable end is lifted to a height of 5.1 mm, and the contact length between the paddle element 51 and the movable end is 1.2 mm. At this point, the limit switch 4 generates a box opening signal. When the lid 2 is opened and the angle formed between it and the box body 1 is 6°, the non-hinged end of the lid 2 is lifted to a height of 18.1 mm, the paddle element 51 completely disengages from the spring 41, and the movable end returns to its initial height without the pressure element 52, which is 8 mm. That is, if the elasticity of the spring 41 itself is intact, the paddle member 51 can cause the travel switch 4 to generate a cover-opening signal without providing an external force to the spring 41 .

[0044] like Figure 5 As shown, in some other embodiments, the cover 2 is hinged to the box body 1, and the limit switch 4 is located at one end of the circuit board 3 near the hinge. In this case, a longer support rod 53 is required, and the circuit board 3 also needs to have an avoidance hole for the support rod 53.

[0045] Furthermore, the movable end is provided with a perforation, into which the paddle member 51 can slide, allowing the pressing member 52 to abut against the movable end and press it downward. When the pressing member 52 is disengaged from the movable end, the paddle member 51 can abut against the movable end and drive the movable end to move. Because a longer support rod 53 is required, the end of the support rod 53 is prone to significant displacement and separation from the spring 41 as the cover 2 rotates, rendering the paddle member 51 unable to move the spring 41. The perforation at the movable end ensures that the paddle member 51 and the pressing member 52 are unlikely to separate from the spring 41, thereby ensuring the mechanical function of the excitation assembly 5.

[0046] In some other embodiments, the cover 2 can also be slidably connected to the box body 1. When opening the cover 2, a pulling force in the direction away from the box body 1 needs to be provided, and the travel switch 4 can be triggered when the cover 2 moves. The specific connection manner between the cover 2 and the box body 1 can use a slide rail connection, and this embodiment does not limit this.

[0047] Specifically, in this embodiment, the travel switch 4 has pins and is welded or inserted onto the circuit board 3 through the pins, realizing the electrical connection between the travel switch 4 and the circuit board 3 while being relatively fixed.

[0048] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments, and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. An intelligent electric energy meter, characterized in that, include: A box body (1), the box body (1) comprising a cavity, the cavity being used to accommodate a circuit board (3); A sealing cover (2), the sealing cover (2) is arranged on the box body (1) and isolates the cavity from the outside world; A travel switch (4) is provided on a side of the circuit board (3) close to the cover (2), the travel switch (4) comprising a moving contact, a static contact and a spring (41), the spring (41) comprising a fixed end and a movable end, the fixed end being fixed to one side of the moving contact, the movable end extending toward the other side of the moving contact, and the movement of the movable end enabling the moving contact to be connected to or disconnected from the static contact; An excitation component (5) is provided on a side of the cover (2) close to the circuit board (3), and the excitation component (5) is provided corresponding to the spring (41). The excitation component (5) includes a pressing piece (52) and a paddle piece (51). The pressing piece (52) and the paddle piece (51) are spaced apart. The paddle piece (51) can be moved to the bottom of the movable end so that the pressing piece (52) presses down the movable end; and when the pressing piece (52) is disengaged from the abutment with the movable end, the paddle piece (51) can abut against the movable end and drive the movable end to lift up.

2. The smart electricity meter according to claim 1, characterized in that, The excitation assembly (5) further comprises a support rod (53), one end of the support rod (53) being connected to the cover (2), and the other end extending in a direction close to the circuit board (3); the paddle member (51) being arranged at an end of the support rod (53) away from the cover (2); and the pressing member (52) being arranged at a side of the paddle member (51) close to the cover (2).

3. The intelligent electric energy meter according to claim 2, wherein, The side surface of the paddle member (51) away from the circuit board (3) is a paddle surface, and the paddle surface is used to paddle the spring (41) to lift up; the side surface of the paddle member (51) close to the circuit board (3) is a guide surface, and the guide surface extends from an end close to the circuit board (3) to an end away from the circuit board (3), and is inclined toward a side close to the movable end.

4. The intelligent electric energy meter according to claim 3, characterized in that, The pick surface is inclined from an end close to the spring sheet (41) to an end away from the spring sheet (41) in a direction close to the pressing piece (52).

5. The intelligent electric energy meter according to claim 1, characterized in that The spring (41) is located at an end of the travel switch (4) away from the circuit board (3), and the movable end extends out of the circumference of the travel switch (4).

6. The intelligent electric energy meter according to claim 1, wherein, The spacing distance between the pressing piece (52) and the prying piece (51) is less than or equal to the movement stroke required for the spring (41) to drive the movable contact to disconnect from the static contact.

7. The intelligent electric energy meter according to claim 1, characterized in that, The paddle member (51) abuts against the movable end and drives the movable end to move, so that the movement stroke of the travel switch (4) generating the cover opening signal is 0.3-0.4 times the length of the spring (41) from the fixed end to the movable end.

8. The intelligent electric energy meter according to any one of claims 1-7, characterized in that, The cover (2) is hinged to the box body (1), and the travel switch (4) is located at an end of the circuit board (3) away from the hinge.

9. The intelligent electric energy meter according to any one of claims 1-7, characterized in that, The cover (2) is hinged to the box body (1), and the travel switch (4) is located at one end of the circuit board (3) close to the hinge.

10. The intelligent electric energy meter according to claim 9, wherein, The movable end is provided with a through hole, and the paddle member (51) can slide into the through hole so that the pressing member (52) abuts against the movable end and presses the movable end downward; the pressing member (52) is disengaged from the abutment with the movable end, and the paddle member (51) can abut against the movable end and drive the movable end to lift up.

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