All-plastic key assembly for intelligent electric meter

Abstract

The utility model discloses an all-plastic key assembly for an intelligent ammeter, a wedge-shaped all-plastic key comprises a key cap and a key body arranged at the lower end of the key cap in an integrated mode, wedge-shaped reset inclined ribs are symmetrically arranged on the two side faces of the key body, vertical limiting grooves are symmetrically cut in the key body at the lower ends of the wedge-shaped reset inclined ribs, and the wedge-shaped reset inclined ribs are embedded in the limiting grooves. Guide inclined ribs are symmetrically arranged on the two sides of the tail end of the key body below the vertical limiting groove; a mounting hole is formed in the meter cover, and a left buckling position and a right buckling position with L-shaped sections are integrally and symmetrically arranged on the meter cover on the two sides of the lower portion of the step and used for limiting a key in the thickness direction of the meter cover. Limiting ribs are symmetrically arranged on the key body along the axis of the key body and used for forming circumferential limiting on the key body. According to the utility model, the assembly difficulty of the key assembly of the intelligent electric meter is simplified by improving the structure.

Description

Technical Field

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

[0002] As a modern scientific and technological product, smart meters have gradually entered people's lives. They use high-precision sensors and intelligent control technology to monitor the use of electricity in real time, and have the advantages of safety, stability, and reliability. The operation of smart meters is also very simple. You only need to master the functions and usage sequences of a few buttons.

[0003] like Figure 2 As shown, the button assembly on the existing smart meter is provided with a button 20, a reset spring 21, and a non-return silicone ring 22; the installation process is: the reset spring 21 is mounted on the guide column at the lower end of the button 20, and then the guide column is inserted into the guide hole on the meter cover, and after it is in place, the non-return silicone ring 22 is clamped in the slot at the end of the guide column, and the assembly process is cumbersome; especially when assembling the non-return silicone ring, the rubber ring is often not assembled in place (not completely falling into the slot), resulting in quality problems such as the rubber ring falling off; in addition, the above button assembly is a small-sized part, and needs to be accurately assembled to a specific position in the meter cover of the smart meter, the working space is small and there are constraints such as the shell, guide holes, and reinforcing ribs, which further increase the difficulty of the assembly operation; in short, due to structural limitations, the button assembly on the existing smart meter is relatively complex, the production and assembly process is cumbersome, which is not conducive to automated assembly, and the production cost is relatively high.

[0004] The wedge-shaped all-plastic button simplifies the button combination on the smart meter, facilitates production, and reduces production costs; it can also well realize the button's fast and reliable reset function. Utility Model Content

[0005] The technical problem to be solved by the utility model is to simplify the assembly difficulty of the key assembly.

[0006] In order to solve the above technical problems, the utility model discloses a fully plastic key assembly for a smart electric meter, comprising a wedge-shaped fully plastic key and a meter cover, wherein the wedge-shaped fully plastic key comprises a key cap and a key body integrally formed at the lower end of the key cap, the two sides of the key body are symmetrically arranged as wedge-shaped reset oblique ribs, a vertical limiting groove is symmetrically cut on the key body at the lower end of the wedge-shaped reset oblique rib, and the two sides of the tail end of the key body below the vertical limiting groove are symmetrically arranged as guide oblique ribs; the wedge-shaped reset oblique rib and the guide oblique rib are arranged in the same plane; the end width of the wedge-shaped reset oblique rib is smaller than the starting width of the guide oblique rib;

[0007] The smart meter is provided with a mounting hole on the cover, and a step matching the keycap is provided at the upper end of the mounting hole for limiting the keycap; left and right buckles with an "L"-shaped cross-section are symmetrically provided on the cover on both sides of the lower part of the step, and the left and right buckles respectively include an extension arm, a bending portion and a tail hook portion, and the extension arm is integrally formed with the cover and arranged along the thickness direction of the cover, and the tail hook portion is a free end, and the tail hook portions of the left and right buckles are both facing the central axis of the mounting hole; the left and right buckles match the wedge-shaped all-plastic buttons, and when the keycap descends to contact the step, the guiding oblique ribs extend below the left and right buckles, and the vertical limiting grooves on both sides are respectively engaged with the bending portions of the left and right buckles, thereby limiting the buttons in the thickness direction of the cover.

[0008] The key body is also provided with limiting ribs symmetrically along its axis, and the limiting ribs are perpendicular to the wedge-shaped reset oblique ribs; the surface covers at both ends of the mounting hole are also provided with circumferential left limiting grooves and circumferential right limiting grooves matching the limiting ribs, and the limiting ribs cooperate with the circumferential left limiting grooves and circumferential right limiting grooves to form circumferential limitation on the key body.

[0009] The inclination of the outer edge of the wedge-shaped reset oblique rib relative to the central axis of the key body is 30±5°.

[0010] The technical advantages of the utility model are as follows: ① It is made of all plastic material, and the left and right buckles have the ability to deform under stress and automatically reset when pressure is lost, thereby realizing the displacement and reset of the key body, and then realizing the key action, with reliable performance. ② It only needs to align the key body with the mounting hole and press it into place to complete the assembly, which is simple to operate; due to the small number of matching factors, the device has the conditions for automated production. ③ The key is an integrally molded plastic part, and the mounting hole and the cover are also integrally molded, with low manufacturing cost; especially the reduced difficulty of assembly has significantly reduced the processing cost, and the economic benefits are obvious. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a three-dimensional diagram of the all-plastic keypad assembly for the smart electric meter of the utility model;

[0012] Figure 2 It is a structural schematic diagram of a button assembly on an existing smart meter;

[0013] Figure 3 It is a plan view of the all-plastic button assembly for the smart meter of the utility model;

[0014] Figure 4 yes Figure 3 A cross-sectional view along line A-A, showing only the mating part between the button and the mounting hole;

[0015] Figure 5 yes Figure 4The cross-sectional view along the BB line only shows the mating part of the button and the mounting hole. DETAILED DESCRIPTION

[0016] The specific implementation of the utility model is further described below in conjunction with the accompanying drawings.

[0017] like Figure 1 , Figure 3 , Figure 4 , Figure 5 It can be seen that the all-plastic key assembly for the smart meter of the utility model includes a wedge-shaped all-plastic key and a meter cover 3. The wedge-shaped all-plastic key includes a key cap 10 and a key body integrally formed at the lower end of the key cap 10. The two sides of the key body are symmetrically provided with wedge-shaped reset oblique ribs 11. The inclination of the wedge-shaped reset oblique rib 11 relative to the central axis of the key body is 30±5°. The key body at the lower end of the wedge-shaped reset oblique rib 11 is symmetrically cut with vertical limit grooves 1 2. Below the vertical limit groove 12, on both sides of the tail end of the key body, guide oblique ribs 13 are symmetrically arranged; the wedge-shaped reset oblique ribs 11 and the guide oblique ribs 13 are arranged in the same plane; the wedge-shaped reset oblique ribs 11 and the guide oblique ribs 13 are both wide at the top and narrow at the bottom, that is, their width at the end of the key cap 10 is greater than the width at the tail end of the key body; the end width of the wedge-shaped reset oblique rib 11 is smaller than the starting end width of the guide oblique rib 13, so that the vertical limit groove 12 is formed on the upper end surface of the guide oblique rib 13.

[0018] like Figure 5 It can be seen that the key body is also provided with limiting ribs 14 symmetrically along its axis, and the limiting ribs 14 are perpendicular to the wedge-shaped reset oblique ribs 11 .

[0019] like Figure 1 , Figure 3 , Figure 4 , Figure 5It can be seen that a mounting hole 30 is provided on the cover 3 of the smart meter, and a step 31 matching the keycap 10 is provided at the upper end of the mounting hole 30 for limiting the keycap 10. A left buckle position 32 and a right buckle position 32' with an "L"-shaped cross section are symmetrically provided on the cover on both sides of the lower part of the step 31. The left buckle position 32 and the right buckle position 32' respectively include an extension arm, a bending part and a tail hook part. The extension arm is integrally formed with the cover and is arranged along the thickness direction of the cover. The tail hook part is a free end. The tail hook parts of the left buckle position 32 and the right buckle position 32' are both facing the central axis of the mounting hole 30; the left buckle position 32 and the right buckle position 32' are symmetrically provided with the cover of the smart meter. The electric meter is matched with a wedge-shaped all-plastic key. When the keycap 10 is pressed down, the pressure is transmitted to the left buckle position 32 and the right buckle position 32' through the wedge-shaped reset oblique rib 11, causing them to deform to both sides; when the pressure disappears, the left buckle position 32 and the right buckle position 32' rebound, and the wedge-shaped reset oblique rib 11 drives the keycap 10 to return to its original position. During the return process, the vertical limiting grooves 12 on both sides are respectively engaged with the bent parts of the left buckle position 32 and the right buckle position 32', thereby limiting the key in the thickness direction of the meter cover.

[0020] like Figure 5 It can be seen that the surface covers at both ends of the mounting hole 30 are also provided with circumferential left limiting grooves 33 and circumferential right limiting grooves 33' that match the limiting ribs 14, and the limiting ribs 14 on the key body cooperate with the circumferential left limiting grooves 33 and circumferential right limiting grooves 33' to form circumferential limiting for the key body.

[0021] Installation process:

[0022] The limiting ribs 14 extending to both sides of the key body are aligned with the circumferential left limiting groove 33 and the circumferential right limiting groove 33'. When the keycap 10 is pressed, the guiding oblique ribs 13 compress the left buckle position 32 and the right buckle position 32' to bend and deform. After reaching the critical point, the guiding oblique ribs 13 exceed the bending parts of the left buckle position 32 and the right buckle position 32', and the left buckle position 32 and the right buckle position 32' lose pressure and reset. At this time, the vertical limiting grooves 12 are respectively engaged with the bending parts of the left buckle position 32 and the right buckle position 32', and the installation is completed. In short, after the key body is aligned with the mounting hole 30, the assembly can be completed by pressing once. During manual installation, the installation is completed as long as the left buckle position 32 and the right buckle position 32' reset sound is heard. Due to the simplified structure and fewer matching factors, there are no technical obstacles to automated assembly.

[0023] Working process:

[0024] When the smart meter needs to be operated, the key cap 10 is pressed, the key body descends, and the free end of the guiding oblique rib 13 contacts the contact on the smart meter to realize signal transmission. During the descending process of the key body, the wedge-shaped reset oblique rib 11 presses the tail hooks of the left buckle position 32 and the right buckle position 32' from both sides to deform them. When the pressure disappears, the left buckle position 32 and the right buckle position 32' are reset, and the key is reset by its elastic force, and the end of the key is naturally separated from the contact. It works steadily and reliably. In this embodiment, the contact is set as a micro switch.

[0025] The specific implementation methods of the present invention include but are not limited to the above-mentioned embodiments. Without departing from the spirit and essence of the present invention, technicians familiar with the field can make various corresponding changes and deformations according to the present invention, but still fall within the protection scope of the present invention.

Claims

1. A fully plastic key assembly for a smart meter, comprising a wedge-shaped fully plastic key and a meter cover (3), characterized in that: The wedge-shaped all-plastic key comprises a key cap (10) and a key body integrally formed at the lower end of the key cap (10), the two sides of the key body are symmetrically arranged as wedge-shaped reset oblique ribs (11), the key body at the lower end of the wedge-shaped reset oblique rib (11) is symmetrically cut with vertical limit grooves (12), and the two sides of the tail end of the key body below the vertical limit groove (12) are symmetrically arranged as guide oblique ribs (13); the wedge-shaped reset oblique rib (11) and the guide oblique rib (13) are arranged in the same plane; the end width of the wedge-shaped reset oblique rib (11) is smaller than the starting width of the guide oblique rib (13); The table cover (3) of the smart meter is provided with a mounting hole (30), and the upper end of the mounting hole (30) is provided with a step (31) matching the keycap (10) for limiting the keycap (10); the table cover at both sides of the lower part of the step (31) is symmetrically provided with a left buckle position (32) and a right buckle position (32') with an "L"-shaped cross section, and the left buckle position (32) and the right buckle position (32') respectively include an extension arm, a bending part and a tail hook part, wherein the extension arm is integrally formed with the table cover and is arranged along the thickness direction of the table cover, and the tail hook part is a free end, and the tail hook parts of the left buckle position (32) and the right buckle position (32') are both oriented toward the central axis of the mounting hole (30); the left buckle position (32) and the right buckle position (32') match the wedge-shaped all-plastic key; The key body is also provided with limiting ribs (14) symmetrically along its axis, and the limiting ribs (14) are perpendicular to the wedge-shaped reset oblique ribs (11); the two end covers of the mounting hole (30) are also provided with circumferential left limiting grooves (33) and circumferential right limiting grooves (33') matching the limiting ribs (14), and the limiting ribs (14) cooperate with the circumferential left limiting grooves (33) and circumferential right limiting grooves (33') to form circumferential limiting for the key body.

2. The all-plastic button assembly for a smart meter as claimed in claim 1, characterized in that: The inclination of the outer edge of the wedge-shaped reset oblique rib (11) relative to the central axis of the key body is 30±5°.

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