A shock resistant electrical meter case and electrical meter

Abstract

The application belongs to the technical field of instruments, and discloses a fall-resistant electric meter shell and an electric meter, which comprise a main body shell, a top cover and an inner shell body.

Description

Technical Field

[0001] This application relates to the field of instrumentation technology, and in particular to a shock-resistant meter housing and a meter. Background Technology

[0002] In the structure of an electricity meter, the meter casing (housing) not only needs to be dustproof and waterproof, but also must possess sufficient mechanical strength and connection stability to ensure that the internal precision electronic components are not damaged. Existing electricity meter casing structures typically employ a split design, consisting of a main body and a top cover. During assembly, injection molding is typically used to symmetrically install elastic hooks on both sides of the top cover, and corresponding slots are provided on the main body. During assembly, the elastic deformation of the hooks engages with the slots, thereby achieving a snap-fit ​​and secure connection between the top cover and the main body.

[0003] Because the latches on both sides are completely symmetrical, they are prone to plastic deformation or breakage when subjected to non-positive impacts (such as a side fall), thus losing their locking function. Especially when the meter is dropped, the top cover can easily loosen from the main casing, causing it to detach easily. Therefore, the existing meter casing structure has poor impact resistance and cannot meet increasingly stringent product impact resistance standards.

[0004] Therefore, existing technologies still need improvement and development. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the purpose of this application is to provide a drop-resistant meter casing and meter, which solves the problem that the top cover of the meter casing is easy to loosen and fall off when dropped.

[0006] The technical solution of this application is as follows: On the one hand, this application proposes a drop-resistant meter housing, including: a main body housing, the top of the main body housing having a main body opening, a first locking part and a second locking part respectively provided on the inner edges of the two sides of the main body opening in a first direction, and a support part provided on the inner wall of the main body housing; The top cover has an installation opening at its top, and a first hook and a second hook are respectively provided on both sides of the top cover in the first direction; The inner shell includes an outer wall located on both sides in the first direction and a light-transmitting window, and a protrusion is provided on the outer wall of the inner shell; The light-transmitting window is embedded in the mounting opening, the protrusion abuts against the upper surface of the support, the outer wall of the inner shell on one side abuts against the first hook, and a clearance space is formed between the outer wall of the inner shell on the other side and the second hook. The first hook is engaged in the first locking part by the overall movement of the top cover and the inner shell. The second hook is elastically deformed towards the clearance space by the pressure and is engaged in the second locking part, and the protrusion is pressed downward to the support part.

[0007] Optionally, the first hook includes: The first connecting plate is disposed on the top cover and abuts against the inner shell; The first hook body is connected to the lower end of the first connecting plate, and a hook position is formed between the first hook body and the first connecting plate, with the opening of the hook position facing outward. A first inclined surface is provided at the inner edge of the first locking part, and the first hook body slides down through the first inclined surface into the main body shell to lock into the first locking part.

[0008] Optionally, the upper surface of the first hook and / or the lower surface of the first locking part are provided with an anti-slip structure.

[0009] Optionally, the second hook includes: a second connecting plate, which is disposed on the top cover and forms a clearance space between it and the inner housing; The second hook body is connected to the lower end of the second connecting plate, and an outward-facing hook position is formed between the second hook body and the second connecting plate; A second inclined surface is provided at the inner edge of the second locking part. The second hook body is elastically deformed by the compression of the second inclined surface and slides down to lock into the second locking part.

[0010] Optionally, the main body shell is also provided with a self-locking component, and the second hook body that is engaged with the second locking part squeezes the self-locking component so that the self-locking component moves and locks into the top cover.

[0011] Optionally, a locking channel is provided on the main body shell, and a locking hole is provided on the lower surface of the top cover; The self-locking assembly includes: a lateral moving rod, which is movably disposed in the locking channel along a first direction; A vertical moving rod is movably positioned in the locking channel in the up-down direction and abuts against the horizontal moving rod; The springback movement of the second hook is converted into an upward movement of the vertical moving rod, so that part of the vertical moving rod moves into the lock hole.

[0012] Optionally, a first return elastic element is provided on the lateral moving rod, which is used to push the lateral moving rod toward the inside of the main body shell.

[0013] Optionally, a second return elastic element is provided on the vertical moving rod, which is used to push the vertical moving rod away from the lock hole.

[0014] Optionally, the support includes: a support rib, which is disposed on the inner wall of the main shell, and the upper surface of the support rib is used to support the protrusion; In the second direction, the support rib is offset from the first or second hook.

[0015] On the other hand, this application also proposes an electricity meter, which includes the shock-resistant meter housing as described above.

[0016] The beneficial effects of the impact-resistant meter housing and the meter provided in this application are at least as follows: During assembly, the first hook is engaged in the first locking position by the overall movement of the top cover and the inner housing; simultaneously, the second hook is elastically deformed towards the clearance space under pressure and engages in the second locking position. During this process, the protrusion presses downward against the support, achieving the connection between the top cover and the main housing, and confining the inner housing within the main housing. The asymmetrical hooking action of the first and second hooks, along with the downward pressing action of the inner housing against the top cover, makes the connection between the top cover and the main housing tighter. By providing a clearance space for the second hook to engage on only one side, and not providing a clearance space for the first hook on the other side, and in conjunction with the downward pressing action of the protrusion on the inner housing against the support, the problem of single force on symmetrical hooks in the prior art is overcome. The inner housing, top cover, and main housing form multiple limiting and pressing mechanisms, greatly improving the overall stability after assembly, effectively preventing the top cover from loosening and falling off when the meter is dropped, and meeting the impact resistance standards of the product. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of a drop-resistant meter casing according to an embodiment of this application; Figure 2 yes Figure 1 Enlarged view of point A; Figure 3 yes Figure 1 Enlarged view of point B; Figure 4 This is an exploded view of a shock-resistant meter casing according to an embodiment of this application; Figure 5 This is a cross-sectional view from another perspective of a drop-resistant meter casing according to an embodiment of this application; Figure 6 This is a cross-sectional view of a self-locking component of a shock-resistant meter casing in the unlocked state, according to an embodiment of this application. Figure 7 This is a cross-sectional view of a self-locking component of a shock-resistant meter casing in the locked state, according to an embodiment of this application.

[0018] The following are the labels in the diagram: 100, Main shell; 110, Main opening; 120, First locking part; 121, First inclined surface; 130, Second locking part; 131, Second inclined surface; 140, Support part; 150, Locking channel; 200, Top cover; 210, Mounting port; 220, First hook; 221, First connecting plate; 222, First hook body; 223, Anti-slip structure; 230, Second hook; 231, Second connecting plate; 232, Second hook body; 240, Clearance space; 300, Inner shell; 310, Outer wall of inner shell; 320, Light-transmitting window; 330, Protrusion; 400, Self-locking assembly; 410, Lateral moving rod; 411, Spherical head; 412, First return elastic element; 420, Vertical moving rod; 421, Wedge block; 422, Second return elastic element. Detailed Implementation

[0019] This application provides a shock-resistant meter casing. To make the purpose, technical solution, and effects of this application clearer and more explicit, the following detailed description is provided with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0020] It should be noted that in annotations, leader lines with arrows represent non-solid areas such as holes and slots, or non-specific solid features such as higher-level features, or specific directions. Leader lines without arrows represent solid features or specific lower-level features.

[0021] When a component is referred to as "fixed to" or "set on" another component, it may be directly or indirectly located on that other component. When a component is referred to as "connected to" another component, it may be directly or indirectly connected to that other component. The terms "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or position based on the accompanying drawings, and are for ease of description only, and should not be construed as limiting the technical solution. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. "A plurality of" means two or more, unless otherwise explicitly defined.

[0022] like Figure 1 , Figure 4As shown, this embodiment proposes a drop-resistant meter casing, mainly comprising a main body shell 100, a top cover 200, and an inner shell 300. The main body shell 100 can be a square-shaped plastic shell. For ease of structural description, the direction of one side of the horizontal plane of the vertically placed main body shell 100 is designated as the first direction (left-right direction), the direction perpendicular to the first direction is designated as the second direction (front-back direction), and the direction of height is designated as the up-down direction. The structural relationships of each component in this embodiment are described based on this. A main body opening 110 is provided at the top of the main body shell 100, and a first locking part 120 and a second locking part 130 are respectively provided at the inner edges of the left and right sides of the main body opening 110. A support part 140 is provided on the inner wall of the main body shell 100. An installation port 210 is provided at the top of the top cover 200, and a first hook 220 and a second hook 230 are respectively provided on both sides of the top cover 200 in the first direction. The inner housing 300 includes an inner housing outer wall 310 located on both sides in a first direction and a light-transmitting window 320. A protrusion 330 is provided on the inner housing outer wall 310. The light-transmitting window 320 is embedded in the mounting opening 210. When a display screen of an electricity meter is installed inside, the displayed information can be seen through the light-transmitting window 320. The protrusion 330 abuts against the upper surface of the support 140, limiting the downward movement of the inner housing 300. The upper part of the inner housing 300 is limited by the light-transmitting window 320 embedded in the mounting opening 210, thereby fixing the inner housing 300 in the vertical direction. When the inner shell 300 is installed onto the top cover 200, a cover assembly is formed. In this cover assembly, on one side of the inner shell outer wall 310 in the first direction, it abuts against the first hook 220 (there is no space between them, or only a small space, which cannot provide a clearance space 240 for the deformation of the first hook 220), and on the other side, a clearance space 240 is formed between the inner shell outer wall 310 and the second hook 230 (e.g., Figure 3 As shown, during the process of the second hook 230 pressing against the second locking part 130, the second hook 230 can have space to elastically shape its edge, so as to smoothly reach the second locking part 130. After restoring its deformation, the second hook 230 can stably hook onto the second locking part 130.

[0023] During the assembly of the top cover 200, inner shell 300, and main shell 100, the top cover 200 and inner shell 300 are first combined to form a cover assembly. Then, the cover assembly is moved as a whole, causing the first hook 220 to engage with the first locking part 120. Simultaneously, the second hook 230 is pressed and elastically deformed towards the clearance space 240 and engages with the second locking part 130. During this process, the protrusion 330 presses downward against the support part 140. Through the snap-fit ​​structure (the first hook 220 engaging with the first locking part 120 and the second hook 230 engaging with the second locking part 130) and the downward pressure of the protrusion 330 against the support part 140, the support part 140 limits the inner shell 300 upward, making the connection between the top cover 200 and the main shell 100 tighter. During the engagement of the snap-fit ​​structure, by setting an asymmetrical first snap hook 220 and second snap hook 230, the main feature is that the inner side of the first snap hook 220 cannot form a clearance space 240, while the inner side of the second snap hook 230 does form a clearance space 240. When the product is installed, if it is dropped or impacted, the first snap hook 220 will not deform and will be firmly connected to the first snap-fit ​​part 120. Even if the second snap hook 230 is impacted, it will not deform enough to disengage from the second snap-fit ​​part 130. In particular, if the entire cover assembly (top cover 200 + inner shell 300) does not shake after being impacted, the second snap hook 230 will not disengage from the second snap-fit ​​part 130. This allows for stable fixation. In conjunction with the protrusion 330 on the inner housing 300 pressing down on the support 140, the support 140 supports the cover assembly upwards. This creates multiple limiting and compression relationships between the inner housing 300, the top cover 200, and the main housing 100, greatly improving the overall stability after assembly. It effectively prevents the top cover 200 from loosening and falling off when the meter is dropped, meeting the product's drop resistance standards.

[0024] like Figure 1 , Figure 2 As shown, in some embodiments, the first hook 220 includes a first connecting plate 221 and a first hook body 222. The first connecting plate 221 is disposed on the top cover 200 and abuts against the outer wall surface of the inner shell 300 (there may be only a small gap, similar to abutting). The first hook body 222 is connected to the lower end of the first connecting plate 221, and a hook position is formed between the first hook body 222 and the first connecting plate 221, with the opening of the hook position facing outward. A first inclined surface 121 is provided at the inner edge of the first locking part 120, and the first hook body 222 slides down into the main shell 100 through the first inclined surface 121 to lock into the first locking part 120. The abutting design between the first connecting plate 221 and the inner shell 300 enhances the supporting rigidity of the first hook 220 and prevents the hook from deforming excessively when subjected to force. Combined with the guiding effect of the first inclined surface 121, the first hook 220 can smoothly slide into the first locking part 120 during assembly, reducing the assembly difficulty and improving the assembly efficiency.

[0025] like Figure 2 As shown, furthermore, an anti-slip structure 223 is provided on the upper surface of the first hook 222 and / or the lower surface of the first locking part 120. Specifically, multiple anti-slip grooves are formed on the upper surface of the first hook 222, and multiple anti-slip teeth are formed on the lower surface of the first locking part 120. When the first hook 222 is hooked onto the first locking part 120, the anti-slip teeth can be engaged in the anti-slip grooves, thus increasing the friction at the connection point. Under impact, the first hook 222 is less likely to detach from the first locking part 120. This anti-slip structure 223 increases the friction between the first hook 220 and the first locking part 120, further preventing relative sliding of the top cover 200 under vibration or impact, and improving the reliability of the connection.

[0026] like Figure 1 , Figure 3 As shown, in some embodiments, the second hook 230 includes a second connecting plate 231 and a second hook body 232. The second connecting plate 231 is disposed on the top cover 200 and forms a clearance space 240 between it and the inner shell 300; the second hook body 232 is connected to the lower end of the second connecting plate 231, and a hook position with an outward opening is formed between the second hook body 232 and the second connecting plate 231. A second inclined surface 131 is provided at the inner edge of the second locking part 130. The second hook body 232 undergoes elastic deformation due to the compression of the second inclined surface 131 and slides down to lock into the second locking part 130. The clearance space 240 reserved between the second connecting plate 231 and the inner shell 300 provides deformation space for the elastic deformation of the second hook body 232, avoiding breakage or plastic deformation of the second hook body 232 due to space limitation during the pressing and locking process, and ensuring the long service life and locking stability of the second hook 230.

[0027] like Figure 3 , Figure 6 , Figure 7 As shown, in some embodiments, the main body shell 100 may also be provided with a self-locking component 400. When the second hook 232 is engaged with the second locking part 130, the second hook 232 pushes the self-locking component 400 outward, so that the self-locking component 400 moves and engages with the top cover 200. In this way, while the second hook 232 cooperates with the second locking part 130 to fix it, the self-locking component 400 also locks the main body shell 100 and the top cover 200, thereby achieving a stable double locking.

[0028] like Figure 3 , Figure 6 , Figure 7As shown, the main body shell 100 further includes a locking channel 150, which can be L-shaped. A locking hole is provided on the lower surface of the top cover 200. The self-locking assembly 400 includes a horizontal moving rod 410 and a vertical moving rod 420. The horizontal moving rod 410 is movably disposed within the locking channel 150 in a first direction; the vertical moving rod 420 is movably disposed within the locking channel 150 in a vertical direction and abuts against the horizontal moving rod 410. The rebound movement of the second hook 232 is converted into an upward movement of the vertical moving rod 420 by the vertical moving rod 420, so that part of the vertical moving rod 420 moves into the locking hole. Utilizing the rebound force of the second hook 232 during insertion as a driving source, the vertical moving rod 420 is automatically pushed into the locking hole of the top cover 200 through the mechanical transmission between the horizontal moving rod 410 and the vertical moving rod 420, thus achieving mechanical self-locking between the top cover 200 and the main body shell 100. This purely mechanical self-locking structure requires no additional power, which not only improves its impact resistance but also enhances the anti-theft and anti-disassembly capabilities of the meter casing.

[0029] like Figure 3 , Figure 6 , Figure 7 As shown, a first return elastic element 412 is further provided on the horizontal moving rod 410. The first return elastic element 412 is used to push the horizontal moving rod 410 toward the inside of the main body shell 100. The first return elastic element 412 ensures that the horizontal moving rod 410 always has a tendency to move toward the inside of the main body shell 100, ensuring a tight fit between it and the second hook 232, making the triggering of the self-locking assembly 400 more sensitive and reliable. A second return elastic element 422 is provided on the vertical moving rod 420. The second return elastic element 422 is used to push the vertical moving rod 420 away from the lock hole. The second return elastic element 422 can provide a restoring force when the top cover 200 needs to be removed, so that the vertical moving rod 420 can smoothly exit the lock hole, facilitating the later maintenance and assembly of the meter.

[0030] like Figure 3 , Figure 6 , Figure 7As shown, in the specific structure, the inward-facing end of the transverse moving rod 410 is provided with an inner protrusion block. The inner protrusion block can protrude from the lower surface of the second locking part 130 (when the transverse moving rod is located inside the first locking part or the second locking part) or protrude from the inner wall surface of the main body shell (when the transverse moving rod is located inside the inner wall of the main body shell). The first elastic element is a spring, which is sleeved on the transverse moving rod 410, with one end abutting against the transverse moving rod 410 and the other end abutting against the inside of the second locking part 130. By applying an inward elastic force through the first elastic element, the initial position of the transverse moving rod 410 is located inside the second locking part 130. Then, when the second hook is engaged with the lower surface of the second locking part 130... During the process, it gradually moves outward, gradually contacting the lower surface of the second locking part 130. This pushes the inner protrusion block, thereby pushing the horizontal moving rod 410 outward. A spherical head 411 is provided at the outward-facing end of the horizontal moving rod 410, and a wedge-shaped block 421 is provided at the lower end of the vertical moving rod 420. The surface of the spherical head 411 abuts against the surface of the wedge-shaped block 421. Thus, during the pushing of the horizontal moving rod 410, the spherical head 411 is pushed outward, thereby pushing the wedge-shaped block 421 upward, causing the vertical moving rod 420 to move upward. The upper end of the vertical moving rod 420 then protrudes from the upper surface of the main housing and enters the lock hole. The second elastic element can also be a spring, which is sleeved on the vertical moving rod, with one end connected to the inside of the main housing and the other end abutting against the vertical moving rod, thereby applying a downward elastic force to the vertical moving rod.

[0031] like Figure 1 , Figure 4 , Figure 5 As shown, in some embodiments, the support portion 140 includes a support rib plate disposed on the inner wall of the main body shell 100, and the upper surface of the support rib plate is used to support the protrusion 330. While providing support, the support rib plate also strengthens the structural strength of the inner wall of the main body shell 100, making it less prone to breakage when subjected to impacts such as drops. In the second direction (front-back direction), the support rib plate is offset from the first hook 220 or the second hook 230, providing a stable support reference for the protrusion 330 of the inner shell 300 and ensuring effective transmission of downward compressive force. Simultaneously, the offset arrangement of the support rib plate and the hook avoids interference between the support rib plate and the hook assembly and deformation, optimizing the internal spatial layout of the meter shell and improving the overall structural compactness and strength.

[0032] In some embodiments, an electricity meter is also provided, including the aforementioned shock-resistant meter housing. This electricity meter possesses extremely high structural strength and shock resistance, making it suitable for various harsh outdoor or industrial environments.

[0033] It should be understood that the application of this application is not limited to the examples above. Those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A shatter-resistant electrical meter housing, characterized by, include: The main body shell has a main body opening at its top, and a first locking part and a second locking part are respectively provided at the inner edges of the two sides of the main body opening in a first direction. A support part is provided on the inner wall of the main body shell. The top cover has an installation opening at its top, and a first hook and a second hook are respectively provided on both sides of the top cover in a first direction; The inner shell includes an outer wall located on both sides in a first direction and a light-transmitting window, and a protrusion is provided on the outer wall of the inner shell; The light-transmitting window is embedded in the mounting opening, the protrusion abuts against the upper surface of the support, one side of the inner shell outer wall abuts against the first hook, and the other side of the inner shell outer wall forms a clearance space with the second hook; The first hook is engaged in the first locking part by the overall movement of the top cover and the inner shell. The second hook is elastically deformed towards the clearance space by the pressure and is engaged in the second locking part, and the protrusion is pressed downward against the support part.

2. The break-resistant electrical meter cover of claim 1, wherein, The first hook includes: A first connecting plate is disposed on the top cover and abuts against the inner shell; A first hook body is connected to the lower end of the first connecting plate, and a hook position is formed between the first hook body and the first connecting plate, with the opening of the hook position facing outward. A first inclined surface is provided at the inner edge of the first locking part, and the first hook slides down into the main body shell through the first inclined surface to lock into the first locking part.

3. The break-resistant electrical meter cover of claim 2, wherein, The upper surface of the first hook body and / or the lower surface of the first locking part are provided with an anti-slip structure.

4. The impact-resistant meter casing according to claim 1, characterized in that, The second hook includes: a second connecting plate, which is disposed on the top cover and forms the clearance space between the top cover and the inner housing; The second hook is connected to the lower end of the second connecting plate, and an outward-facing hook position is formed between the second hook and the second connecting plate; A second inclined surface is provided at the inner edge of the second locking part. The second hook body is elastically deformed by the compression of the second inclined surface and slides down to lock into the second locking part.

5. The impact-resistant meter casing according to claim 4, characterized in that, The main shell is also provided with a self-locking component. The second hook, which is engaged with the second locking part, squeezes the self-locking component so that the self-locking component moves and engages with the top cover.

6. The impact-resistant meter casing according to claim 5, characterized in that, The main body shell has a locking channel, and the lower surface of the top cover has a locking hole; The self-locking component includes: a lateral moving rod, which is movably disposed in the locking channel along a first direction; A vertical moving rod is movably disposed in the locking channel in the up-down direction and abuts against the horizontal moving rod; The springback movement of the second hook is converted into an upward movement of the vertical moving rod, so that part of the vertical moving rod moves into the lock hole.

7. The impact-resistant meter casing according to claim 6, characterized in that, The lateral moving rod is provided with a first return elastic element, which is used to push the lateral moving rod toward the inside of the main body shell.

8. The impact-resistant meter casing according to claim 7, characterized in that, The vertical moving rod is provided with a second return elastic element, which is used to push the vertical moving rod away from the lock hole.

9. The impact-resistant meter casing according to claim 1, characterized in that, The support portion includes: a support rib plate, the support rib plate being disposed on the inner wall of the main body shell, the upper surface of the support rib plate being used to support the protrusion; In the second direction, the supporting rib is misaligned with the first or second hook.

10. An electricity meter, characterized in that, Including the shock-resistant meter housing as described in any one of claims 1-9.

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