CN220603553U - Electric power instrument - Google Patents

Abstract

The application provides an electric power instrument relates to electrician's measuring device's technical field, has solved electric power instrument among the correlation technique because the production process is loaded down with trivial details and material cost is high, the problem that the manufacturing cost is high that leads to. The power meter provided by the embodiment of the application comprises: the self-tapping screw comprises a mounting bracket, a bracket pillar, a dial plate, a first self-tapping screw and a wiring structure. Wherein the mounting bracket is arranged in the shell of the electric power instrument; the support post is made of plastic and is connected to the mounting support; the dial plate is arranged at one end of the support pillar, which is far away from the mounting support; the first self-tapping screw penetrates through the dial plate and is in threaded connection with the support post. The wiring structure comprises a wiring nut, an inner screw and an outer screw; the wiring nut is embedded on the shell, one end of the wiring nut is positioned in the shell, and the other end of the wiring nut is positioned outside the shell; the inner screw is connected to the wiring nut from the inner side of the shell; the outer screw is connected to the terminal nut from the outside of the housing. The electric power instrument in the embodiment of the application has the beneficial effect of low production cost.

Description

Electric power instrument

Technical Field

The embodiment of the application relates to the technical field of electrician measuring devices, in particular to an electric meter.

Background

The electric power instrument is used as an electric measuring device, has the function of accurately measuring circuit parameters, can be used alone, can also be used as a distribution board for matching, and can achieve the purpose of controlling a circuit when being matched for use.

The electric power instrument among the related art mainly includes the shell, forms in the shell and holds the chamber, holds intracavity and has set gradually dial plate, installing support and solenoid from one end to the other end, and the shell outside is provided with terminal and installation nut. The dial plate, the mounting bracket, the electromagnetic coil and the shell are connected through at least one pair of hexagonal copper support posts, one end of each hexagonal copper support post is provided with a stud, the other end of each hexagonal copper support post is provided with a screw hole, the studs sequentially penetrate through holes in the mounting bracket and holes in a coil framework of the electromagnetic coil, the studs are connected with the shell through embedded nuts embedded in the support posts (integrally arranged with the shell) of the shell, and additionally, mounting screws penetrate through holes in the dial plate and then are screwed into the screw holes at the other end of each hexagonal copper support post, so that the dial plate, the mounting bracket, the electromagnetic coil and the shell are connected.

The electric power instrument has the advantages of complex production procedures and high material cost, so that the whole production cost of the electric power instrument is high.

Disclosure of Invention

In view of the above, embodiments of the present application provide an electric power meter, which has the advantage of low production cost.

The embodiment of the application provides an electric power instrument, and the electric power instrument includes: the self-tapping screw comprises a mounting bracket, a bracket pillar, a dial plate, a first self-tapping screw and a wiring structure. Wherein the mounting bracket is arranged in the shell of the electric power instrument; the support post is made of plastic and is connected to the mounting support; the dial plate is arranged at one end of the support pillar, which is far away from the mounting support; the first self-tapping screw penetrates through the dial plate and is in threaded connection with the support post; the wiring structure comprises a wiring nut, an inner screw and an outer screw; the wiring nut is embedded on the shell, one end of the wiring nut is positioned in the shell, and the other end of the wiring nut is positioned outside the shell; the inner screw is connected to the wiring nut from the inner side of the shell and is used for electrically connecting the wiring nut with a circuit in the electric instrument; the outer screw is connected to the connection nut from the outside of the housing for electrically connecting the outer connection to the connection nut.

Through above-mentioned scheme, because the support pillar is plastic material, compare the support pillar of copper material among the related art, plastic material's support pillar cost is lower. In addition, be the plastics material based on the support pillar, when using first self-tapping screw and support pillar to be connected, need not the prefabricated screw on the support pillar, but can directly drive into the support pillar with first self-tapping screw, perhaps only set up the unthreaded hole on the support pillar, in driving into the unthreaded hole on the support pillar with first self-tapping screw, form the threaded connection relation between first self-tapping screw and the support pillar, realize being connected between dial plate and the installing support, it is visible, need not behind the prefabricated screw on the support pillar, electric instrument's manufacturing cost further reduces. Therefore, the electric power instrument in the scheme has the beneficial effect of low production cost. Based on the wiring structure, when a user connects an external wiring between the screw head of the external screw and the wiring nut and tightens the external screw, the external wiring is clamped between the screw head of the external screw and the wiring nut, so that the electric connection between the external wiring and the wiring nut is realized, and a circuit in the wiring nut and the electric instrument is already connected by the internal screw. In addition, the inner screw and the outer screw can be screwed on the wiring nut through the electric screwdriver, so that the wiring structure is more convenient and quick to assemble, the inner screw and the outer screw can be firmly connected to the wiring nut, the inner screw and the outer screw are not easy to loosen after being connected, the electric connection between the wiring nut and a circuit in the electric instrument is further reliable, and the outer screw is not easy to loosen and lose during product transportation.

In some embodiments, the outer screw is a spring flat pad screw assembly.

Through above-mentioned scheme, the spring flat pad screw sub-assembly includes the elastic washer that has assembled, flat washer and screw spare, through screwing up the screw spare on the binding nut, just can once only realize the connection of binding nut, elastic washer, flat washer and screw spare, and the packaging efficiency of wiring structure is higher. And when connecting the external connection, the elastic washer and the flat washer are also beneficial to the reliable contact between the external connection and the connection nut. The external connection wire is more stable and reliable after being connected with the electric power instrument.

In some embodiments, the power meter further comprises a housing post, a solenoid, and a second self-tapping screw, the housing post being of plastic material and being connected to the housing; the electromagnetic coil comprises a coil framework, and the coil framework is arranged between the shell support column and the mounting bracket; the second self-tapping screw penetrates through the mounting bracket and the coil framework and is in threaded connection with the shell support.

Through above-mentioned scheme, the shell pillar is plastic material, and its cost is lower. Based on the shell pillar is plastic material, and second self-tapping screw need not prefabricated screw on the shell pillar when with shell pillar threaded connection, but can directly drive into the shell pillar with second self-tapping screw, perhaps only set up the unthreaded hole on the shell pillar, in driving into the unthreaded hole on the shell pillar with second self-tapping screw, form the threaded connection relation between second self-tapping screw and the shell pillar, it is seen that need not behind prefabricated screw on the shell pillar, electric instrument's manufacturing cost further reduces. The second self-tapping screw penetrates through the mounting bracket and the coil framework, and is connected with the housing through the screw thread connection structure, so that the connection among the mounting bracket, the electromagnetic coil and the housing can be realized, and the assembly among all main components of the electric power instrument can be realized through the connection between the dial plate, the mounting bracket, the electromagnetic coil and the housing by the first self-tapping screw and the second self-tapping screw.

In some embodiments, the bracket post is integrally formed with the mounting bracket.

Through above-mentioned scheme, integrated into one piece's mode can realize the simultaneous shaping of support pillar and installing support to realized being connected between support pillar and the installing support, it is simple and convenient, the cost is lower.

In some embodiments, the housing post is integrally formed with at least a portion of the housing.

Through above-mentioned scheme, integrated into one piece's mode can realize the simultaneous shaping of at least part of shell pillar and shell to realized being connected between shell pillar and the shell, it is simple and convenient, the cost is lower.

In some embodiments, the housing includes a first shell and a second shell, the first shell and the second shell being connected by a snap-fit structure.

By providing the housing as an assembly comprising a first housing and a second housing, assembly of the housing internals is facilitated. The first shell and the second shell are connected through the buckle structure, the first shell and the second shell can be prevented from being separated, and compared with the mode of screw connection in the related art, the mode of buckle connection improves the installation efficiency of the first shell and the second shell, and saves the production cost of the electric power instrument.

In some embodiments, the fastening structure includes a protrusion disposed on the first housing and a groove disposed on the second housing, where the protruding direction of the protrusion on the first housing is not coincident with the first direction, and the protrusion is fastened in the groove; the first direction is a direction in which the first housing and the second housing are separated.

Because the protrusion is clamped in the groove, the first shell and the second shell are limited by the protrusion and the groove in the first direction after being buckled, and therefore the first shell and the second shell are difficult to separate along the first direction.

In some embodiments, the power meter further comprises a mounting stud and a mounting nut, the mounting stud being disposed on an outer wall of the housing; the installation nut is in threaded connection with the installation stud, and the installation nut is a plastic piece.

Through the scheme, when the electric power instrument is installed at the using position, the installation nut can be detached firstly, the installation stud penetrates through the installation accessory, and then the installation nut is screwed on the installation stud, so that the installation of the electric power instrument in use is realized. The mounting nut is a plastic part, and compared with a metal part, the cost of the plastic part is lower, so that the whole production cost of the electric power instrument is reduced.

In some embodiments, at least a portion of the metallic piece surface of the power meter is provided with a galvanization layer.

Through the scheme, compared with other anti-corrosion plating layers, the galvanized layer is lower in cost, higher in corrosion resistance and beneficial to long-term use of the electric instrument in an environment with higher corrosiveness.

The electric power instrument in this application embodiment is through setting up the support pillar into plastics material, compares the support pillar of copper material among the correlation technique, and plastics material's support pillar cost is lower. In addition, be the plastics material based on the support pillar, when using first self-tapping screw and support pillar to be connected, need not the prefabricated screw on the support pillar, but can directly drive into the support pillar with first self-tapping screw, perhaps only set up the unthreaded hole on the support pillar, in driving into the unthreaded hole on the support pillar with first self-tapping screw, form the threaded connection relation between first self-tapping screw and the support pillar, realize being connected between dial plate and the installing support, it is visible, need not behind the prefabricated screw on the support pillar, electric instrument's manufacturing cost further reduces. Therefore, the electric power instrument in the scheme has the beneficial effect of low production cost.

The foregoing description is only an overview of the technical solutions of the embodiments of the present application, and may be implemented according to the content of the specification, so that the technical means of the embodiments of the present application can be more clearly understood, and the following detailed description of the present application will be presented in order to make the foregoing and other objects, features and advantages of the embodiments of the present application more understandable.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic sectional view of an electric power meter in the related art.

Fig. 2 is a schematic diagram of an overall structure of an electric power meter according to an embodiment of the present application.

Fig. 3 is a schematic cross-sectional view of an electric power meter according to an embodiment of the present application along an axis of a support pillar.

Fig. 4 is a schematic cross-sectional view of an electric power meter according to an embodiment of the present application, taken along an axis of a housing pillar.

Fig. 5 is a schematic cross-sectional view of an electric power meter according to an embodiment of the present application along a fastening structure.

Description of related Art reference numerals:

100. a housing; 101. a receiving chamber; 110. a dial; 120. a mounting bracket; 130. an electromagnetic coil; 140. binding posts; 150. installing a nut; 160. hexagonal copper pillars; 161. a stud; 162. a screw hole; 170. a housing strut; 180. embedding a nut; 190. and (5) installing a screw.

Reference numerals of the embodiments of the present application illustrate:

200. a housing; 201. a first housing; 2011. a first wall; 202. a second housing; 2021. a second wall; 210. a mounting bracket; 211. a support post; 220. a dial; 230. a first self-tapping screw; 240. an electromagnetic coil; 241. a coil bobbin; 250. a housing strut; 260. a second self-tapping screw; 270. a buckle structure; 271. a protrusion; 272. a groove; 280. a wiring structure; 281. a terminal nut; 282. an inner screw; 283. an outer screw; 290. a circuit board; 300. installing a stud; 310. installing a nut; x, a first direction; y, second direction; a. the protrusion is adjacent to a side of the second housing.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, based on the embodiments herein, which would be apparent to one of ordinary skill in the art without making any inventive effort, are intended to be within the scope of the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description of the applications herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

The terms "comprising" and "having" and any variations thereof in the description and claims of the present application and in the description of the drawings are intended to cover, but not exclude, other matters. The word "a" or "an" does not exclude the presence of a plurality.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of the phrase "an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

The term "and/or" is herein merely an association relationship describing an associated object, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

The directional terms appearing in the following description are all directions shown in the drawings, and do not limit the specific structure of the electric power meter of the present application. For example, in the description of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms first, second and the like in the description and in the claims of the present application or in the above-described figures, are used for distinguishing between different objects and not for describing a particular sequential order, and may be used to expressly or implicitly include one or more such features.

In the description of the present application, unless otherwise indicated, the meaning of "plurality" means two or more (including two), and similarly, "plural sets" means two or more (including two).

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, e.g., the terms "connected" or "coupled" of a mechanical structure may refer to a physical connection, e.g., the physical connection may be a fixed connection, e.g., by a fastener, such as a screw, bolt, or other fastener; the physical connection may also be a detachable connection, such as a snap-fit or snap-fit connection; the physical connection may also be an integral connection, such as a welded, glued or integrally formed connection. "connected" or "connected" of circuit structures may refer to physical connection, electrical connection or signal connection, for example, direct connection, i.e. physical connection, or indirect connection through at least one element in the middle, so long as circuit communication is achieved, or internal communication between two elements; signal connection may refer to signal connection through a medium such as radio waves, in addition to signal connection through a circuit. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

The electric power instrument is widely used in the field of electrician measurement.

As shown in fig. 1, fig. 1 is a schematic cross-sectional structure of an electric power meter in the related art. Referring to fig. 1, the related art electric power meter mainly includes a housing 100, a housing cavity 101 is formed in the housing 100, a dial 110, a mounting bracket 120 and an electromagnetic coil 130 are sequentially disposed in the housing cavity 101 from one end to the other end, and a terminal 140 and a mounting nut 150 are disposed outside the housing 100. The dial 110, the mounting bracket 120, the electromagnetic coil 130 and the housing 100 are connected by at least one pair of hexagonal copper pillars 160, one end of the hexagonal copper pillar 160 is provided with a stud 161, the other end is provided with a screw hole 162, the stud 161 sequentially passes through a hole on the mounting bracket 120 and a hole on a coil skeleton of the electromagnetic coil 130, and is connected with the housing 100 by an embedded nut 180 embedded in a housing pillar 170 (integrally arranged with the housing 100), and a mounting screw 190 passes through the hole on the dial 110 and then is screwed in the screw hole 162 at the other end of the hexagonal copper pillar 160, thereby realizing the connection among the dial 110, the mounting bracket 120, the electromagnetic coil 130 and the housing 100.

The structure of the electric power meter in the related art described above makes the process of manufacturing the electric power meter complicated, for example, the hexagonal copper pillar 160 needs to be processed into a hexagonal prism shape on its outer periphery, and the screw hole 162 needs to be processed at one end and the screw hole 161 at the other end at the time of manufacturing, and the manufacturing process is complicated. In the installation of the hexagonal copper pillar 160, an assembler is required to screw the stud 161 of the hexagonal copper pillar 160 into the insert nut 180 using a wrench, which is time-consuming and labor-consuming, and the installation efficiency is low. In addition, the hexagonal copper pillars 160 are relatively expensive in terms of material.

For the above reasons, the overall production cost of the electric power meter is high.

In view of this, embodiments of the present application provide an electrical power meter. As shown in fig. 2, fig. 3 and fig. 4, fig. 2 is a schematic overall structure of an electric power meter provided in an embodiment of the present application, and fig. 3 is a schematic cross-sectional structure of the electric power meter provided in an embodiment of the present application, which is cut along an axis of a support pillar. Fig. 4 is a schematic cross-sectional view of an electric power meter according to an embodiment of the present application, taken along an axis of a housing pillar.

Referring to fig. 2 and 3 and 4, the electric power meter includes: the mounting bracket 210, the bracket post 211, the dial 220, the first self-tapping screw 230, and the wiring structure 280. Wherein the mounting bracket 210 is disposed within the housing 200 of the electrical meter; the bracket support 211 is made of plastic and is connected to the mounting bracket 210; dial 220 is provided at one end of bracket post 211 remote from mounting bracket 210; the first tapping screw 230 penetrates the dial 220 and is screwed with the bracket stay 211. The wiring structure 280 includes a wiring nut 281, an inner screw 282, and an outer screw 283; the wiring nut 281 is embedded on the shell 200, one end of the wiring nut 281 is positioned in the shell 200, and the other end of the wiring nut 281 is positioned outside the shell 200; the inner screw 282 is connected to the junction nut 281 from the inside of the housing 200 for electrically connecting the junction nut 281 with the electrical circuit within the power meter; the outer screw 283 is coupled to the junction nut 281 from the outside of the housing 200 for electrically connecting the outer junction with the junction nut 281.

The dial 220 is an important part of the electric power instrument, the dial 220 is generally provided with scales and is used for being matched with a pointer, when the electric power instrument is connected to a circuit, the pointer is driven by electric signals such as current or voltage to swing, so that the corresponding scales on the dial 220 are indicated, and a user can read the intensity of the corresponding electric signals indicated by the pointer.

The bracket support 211 is connected to the mounting bracket 210, so that the position of the bracket support 211 is fixed after the position of the mounting bracket 210 within the housing 200 is fixed as the position of the mounting bracket 210 is changed.

The bracket support 211 is made of plastic, such as Polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polystyrene (PS), or acrylonitrile-butadiene-styrene copolymer (ABS). The plastic material has the advantages of large yield, good formability, low price and the like, and the support post 211 is made of plastic material, so that compared with the hexagonal copper post in the related art, the cost of the support post 211 made of plastic material is lower.

In addition, based on the fact that the bracket support 211 is made of plastic, when the first tapping screw 230 is used for being connected with the bracket support 211, the bracket support 211 does not need to be prefabricated with screw holes, but the first tapping screw 230 can be directly driven into the bracket support 211, or only the bracket support 211 is provided with a unthreaded hole, the first tapping screw 230 is driven into the unthreaded hole on the bracket support 211, a threaded connection relationship between the first tapping screw 230 and the bracket support 211 is formed, and connection between the dial 220 and the mounting bracket 210 is achieved.

Therefore, the electric power meter in the above-described scheme has a significantly reduced production cost compared to the electric power meter in the related art.

Alternatively, the bracket support 211 may be coupled to the mounting bracket 210 in such a manner that the bracket support 211 is integrally formed with the mounting bracket 210.

The simultaneous forming of the bracket support 211 and the mounting bracket 210 can be realized in an integrated forming manner, and the connection between the bracket support 211 and the mounting bracket 210 is realized, so that the method is simple and convenient, and the cost is low.

In addition, the connection manner between the bracket support 211 and the mounting bracket 210 may be screw connection, bonding, welding, etc., which will not be described in detail in the embodiment of the present application.

The wiring structure 280 is a structure for connecting a circuit inside the electric power meter and an external wiring to one circuit. The external connection wire is a wire connected by a user when the user uses the electric power instrument. The circuitry within the power meter is connected to an external line on a loop through wiring structure 280 such that the value indicated by the pointer of the power meter on dial 220 coincides with the actual electrical signal on the loop to which it is connected.

The inner screw 282 is coupled to the binding nut 281 from the inside of the housing 200, meaning that the direction in which the inner screw 282 is screwed into the binding nut 281 is from the inside of the housing 200.

The outer screw 283 is coupled to the binding nut 281 from the outside of the housing 200, meaning that the outer screw 283 is screwed into the binding nut 281 in a direction from the outside of the housing 200.

As shown in fig. 4, in some possible ways, the inner screw 282 may electrically connect the terminal nut 281 to circuitry within the power meter by: the electrical circuitry within the power meter is integrated into a circuit board 290 and the internal screw 282 passes through the circuit board 290 and connects to the wiring nut 281, thereby compressing the circuit board 290 and the wiring nut 281 together to make an electrical connection between the circuit board 290 and the wiring nut 281.

In the above-described possible manner, in order to improve the stability of the electrical connection between the circuit board 290 and the connection nut 281, a washer (flat washer and/or elastic washer) may be fitted over the inner screw 282, and the inner screw 282 may be further pressed against the connection nut 281 by the washer, thereby preventing poor contact between the circuit board 290 and the connection nut 281.

Similarly, a washer (flat washer and/or elastic washer) may be sleeved on the outer screw 283, and the outer screw 283 further presses the outer wire against the wire connection nut 281 through the washer, so as to prevent poor contact between the outer wire connection and the wire connection nut 281.

For ease of assembly, the outer screw 283 may be provided as a snap-flat pad screw assembly.

The spring flat washer screw assembly comprises an assembled elastic washer, a flat washer and a screw member, and the connection of the wiring nut 281, the elastic washer, the flat washer and the screw member can be realized at one time by screwing the screw member on the wiring nut 281, so that the assembly efficiency of the wiring structure 280 is high. While the resilient washer and flat washer also facilitate reliable contact between the outer wire and the wire nut 281 when the outer wire is connected. The external connection wire is more stable and reliable after being connected with the electric power instrument.

Based on the above wiring structure 280, when the user connects the external wiring between the screw head of the external screw 283 and the wiring nut 281, and tightens the external screw 283, the external wiring is clamped between the screw head of the external screw 283 and the wiring nut 281, so that the electrical connection between the external wiring and the wiring nut 281 is realized, and the wiring nut 281 and the circuit in the electric power meter are already connected by the internal screw 282, therefore, the electrical connection between the external wiring and the circuit in the electric power meter can be conveniently realized through the above structure, and the wiring is convenient for the user when in use.

In addition, interior screw 282 and outer screw 283 all can screw up on binding nut 281 through electric screw driver, and the equipment of wiring structure 280 is also more convenient, swift, and makes interior screw 282 and outer screw 283 all can be firmly connected on binding nut 281 through electric screw driver, and the connection back is difficult to become flexible, and this further makes the electricity between circuit in binding nut 281 and the electric instrument be connected comparatively reliably to and outer screw 283 is difficult for the pine to take off and lose in the product transportation.

With continued reference to fig. 4, in some embodiments, the power meter further includes a housing post 250, a solenoid 240, and a second self-tapping screw 260, where the housing post 250 is made of plastic and is connected to the housing 200; the electromagnetic coil 240 includes a coil bobbin 241, the coil bobbin 241 being disposed between the housing leg 250 and the mounting bracket 210; the second tapping screw 260 penetrates the mounting bracket 210 and the bobbin 241, and is screwed with the housing stay 250.

The housing post 250 is connected to the housing 200 so that the positions of the housing post 250 and the housing 200 are fixed relative to each other and the positions of any component in the housing 200 are also fixed after the connection of that component to the housing post 250.

The electromagnetic coil 240 is used to generate a magnetic field after the electric meter is connected to the circuit to be tested, and the magnetic field can drive the pointer of the electric meter to swing. Wherein the bobbin 241 is used to wind the coil.

The second tapping screw 260 penetrates the mounting bracket 210 and the coil bobbin 241 and is in threaded connection with the housing stay 250, so that connection among the mounting bracket 210, the electromagnetic coil 240 and the housing 200 can be achieved, and since the mounting bracket 210 is connected with the dial 220 through the first tapping screw 230, connection among the dial 220, the mounting bracket 210, the electromagnetic coil 240 and the housing 200 can be achieved through the first tapping screw 230 and the second tapping screw 260, and assembly among main components of the electric power instrument can be achieved.

The housing post 250 is made of plastic material, such as Polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polystyrene (PS), or acrylonitrile-butadiene-styrene copolymer (ABS), etc. The plastic material has the advantages of large yield, good formability, low price, etc., and the housing stay 250 is made of plastic material, so that the cost of the housing stay 250 is reduced.

Based on the shell pillar 250 is plastic material, when the second self-tapping screw 260 is in threaded connection with the shell pillar 250, the shell pillar 250 does not need to be prefabricated with a screw hole, but the second self-tapping screw 260 can be directly driven into the shell pillar 250, or only the shell pillar 250 is provided with a unthreaded hole, the second self-tapping screw 260 is driven into the unthreaded hole on the shell pillar 250, so that the threaded connection relation between the second self-tapping screw 260 and the shell pillar 250 is formed, and therefore, based on the plastic material of the shell pillar 250, when the electric power instrument is assembled, the screw hole does not need to be prefabricated on the shell pillar 250, and the production cost of the electric power instrument is further reduced.

Alternatively, the housing post 250 may be attached to the housing 200 in a manner such that the housing post 250 is integrally formed with at least a portion of the housing 200, or such that the housing post 250 is screwed, glued, welded, etc. with at least a portion of the housing 200.

Wherein, at least part of the housing 200 refers to part or all of the housing 200, for example, when the housing 200 itself is an integrally formed whole, at least part of the housing 200 is all of the housing 200; when the housing 200 includes a plurality of components, at least a portion of the housing 200 is one of the components of the housing 200.

In the above connection modes, the at least part of the housing pillar 250 and the housing 200 are integrally formed, so that the at least part of the housing pillar 250 and the housing 200 can be formed simultaneously, and the connection between the housing pillar 250 and the housing 200 is realized, which is simple and convenient, and has low cost.

Exemplary, as shown in fig. 5, fig. 5 is a schematic cross-sectional structure view of an electric power meter according to an embodiment of the present application, taken along a fastening structure. Referring to fig. 2 and 5, in some embodiments, the housing 200 includes a first housing 201 and a second housing 202, and the first housing 201 and the second housing 202 are connected by a snap structure 270.

In this embodiment, the housing stay 250 may be connected to the first case 201 or the second case 202.

Wherein, the first housing 201 and the second housing 202 may each be a shell-like structure having one end opened, and the open ends of the first housing 201 and the second housing 202 are close to and contact each other. The first housing 201 and the second housing 202 may also be a shell-like structure in which one end is open, and the other is a plate-like structure mounted at the open end of the shell-like structure. The first housing 201 and the second housing 202 cooperate to form a chamber that accommodates the internal components of the housing 200.

In addition to the first and second cases 201 and 202, the housing 200 may be formed of more parts in other embodiments, for example, in an example, the housing 200 includes an upper cover, a middle cover and a base, the middle cover is formed in a cylindrical shape with two open ends, and the upper cover and the base are respectively connected to one opening of the middle cover, so that a chamber for accommodating components inside the housing 200 is formed in the housing 200. In this example, the first case 201 and the second case 202 may be an upper cover and a middle cover, respectively, or may be a middle cover and a base, respectively.

The first housing 201 and the second housing 202 are connected through the fastening structure 270, separation of the first housing 201 and the second housing 202 can be prevented, and compared with the mode that different parts of the housings are connected through screws in the related art, the mounting efficiency of the first housing 201 and the second housing 202 is improved through the fastening mode, the cost of the screws is saved, and therefore the production cost of the electric power instrument is saved.

With continued reference to fig. 5, in some embodiments, the fastening structure 270 includes a protrusion 271 disposed on the first housing 201 and a groove 272 disposed on the second housing 202, where a protruding direction of the protrusion 271 on the first housing 201 is not coincident with the first direction X, and the protrusion 271 is fastened in the groove 272; the first direction X is a direction in which the first casing 201 and the second casing 202 are separated.

Because of this, since the projection 271 is engaged in the groove 272, after the first case 201 and the second case 202 are assembled, the first case 201 and the second case 202 are restricted by the projection 271 and the groove 272 in the first direction X, and are difficult to separate in the first direction X.

For example, as shown in fig. 5, the first housing 201 and the second housing 202 are disposed opposite to each other in the first direction X, the first housing 201 has a first wall 2011, the second housing 202 has a second wall 2021, the first wall 2011 is located on one side of the second wall 2021, the protrusion 271 is located on one side of the first wall 2011 near the second wall 2021, the groove 272 is located on the second wall 2021 at a position corresponding to the protrusion 271, and the groove 272 may penetrate through the second wall 2021 or not penetrate through the second wall 2021; wherein the second direction Y is perpendicular to the first direction X.

Alternatively, the protrusion forms an obtuse angle between the side surface a of the second housing close to the first wall 2011, so that when the first housing 201 is assembled with the second housing 202, the second wall 2021 may deform the first wall 2011 in a direction away from the second wall 2021 by pressing the side surface, so that the second housing 202 can continuously move in a direction close to the first housing 201 until the protrusion 271 enters the groove 272.

Referring to fig. 5, the electric power meter further includes a mounting stud 300 and a mounting nut 310, wherein the mounting stud 300 is disposed on an outer wall of the housing 200; the mounting nut 310 is screwed onto the mounting stud 300, and the mounting nut 310 is a plastic member.

In the above-mentioned scheme, when the electric power instrument is installed at the use position, the installation nut 310 can be removed first, the installation stud 300 passes through the installation accessory, and then the installation nut 310 is screwed on the installation stud 300, so as to realize the installation of the electric power instrument in use.

The mounting nut 310 is a plastic piece, which is less costly than a metal piece, thereby reducing the overall production cost of the power meter.

In some embodiments, at least a portion of the metallic piece surface of the power meter is provided with a galvanization layer.

For example, the metal member provided with the galvanized layer may include any one or more of the first tapping screw 230, the second tapping screw 260, the inner screw 282, the outer screw 283, the junction nut 281, etc. in the foregoing embodiments, and may be other metal members not mentioned in the foregoing embodiments of the present application, which are not limited thereto.

Through the scheme, compared with other anti-corrosion plating layers, the galvanized layer is lower in cost, higher in corrosion resistance and beneficial to long-term use of the electric instrument in an environment with higher corrosiveness.

The electric power meter in the embodiment of the application is lower in cost of the support post 211 made of plastic material compared with the hexagonal copper post in the related art by setting the support post 211 made of plastic material. In addition, based on the fact that the bracket support 211 is made of plastic, when the first tapping screw 230 is used for being connected with the bracket support 211, the bracket support 211 does not need to be prefabricated with screw holes, but the first tapping screw 230 can be directly driven into the bracket support 211, or only the bracket support 211 is provided with a unthreaded hole, the first tapping screw 230 is driven into the unthreaded hole on the bracket support 211, a threaded connection relationship between the first tapping screw 230 and the bracket support 211 is formed, connection between the dial 220 and the mounting bracket 210 is achieved, and therefore production cost of the electric instrument is further reduced after the screw holes are not required to be prefabricated on the bracket support 211. Therefore, the electric power instrument in the scheme has the beneficial effect of low production cost.

Those skilled in the art will appreciate that while some embodiments herein include some features but not others included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the present application and form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.

In summary, the above embodiments are only for illustrating the technical solution of the present application, and are not limiting; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.

Claims (9)

1. An electrical power meter, comprising:

the mounting bracket is arranged in the shell of the electric power instrument;

the support post is made of plastic and is connected with the mounting support;

the dial plate is arranged at one end of the support pillar, which is far away from the mounting support;

the first self-tapping screw penetrates through the dial plate and is in threaded connection with the support post; the method comprises the steps of,

the wiring structure comprises a wiring nut, an inner screw and an outer screw, wherein the wiring nut is embedded on the shell, one end of the wiring nut is positioned in the shell, and the other end of the wiring nut is positioned outside the shell; the inner screw is connected to the wiring nut from the inner side of the shell and is used for electrically connecting the wiring nut with a circuit in the electric power instrument; the outer screw is connected to the terminal nut from the outside of the housing for electrically connecting an outer terminal with the terminal nut.

2. The power meter of claim 1, wherein the outer screw is a spring flat pad screw assembly.

3. The power meter of claim 1, further comprising:

the shell support is made of plastic and is connected with the shell;

the electromagnetic coil comprises a coil framework, and the coil framework is arranged between the shell support and the mounting bracket;

and the second self-tapping screw penetrates through the mounting bracket and the coil framework and is in threaded connection with the shell support.

4. The electrical power meter of claim 1, wherein the bracket post is integrally formed with the mounting bracket.

5. A power meter according to claim 3, wherein the housing post is integrally formed with the housing.

6. The electrical power meter of any one of claims 1-5, wherein the housing comprises a first housing and a second housing, the first housing and the second housing being connected by a snap-fit structure.

7. The electrical power meter of claim 6, wherein the snap-fit structure comprises a protrusion on the first housing and a recess on the second housing, the protrusion on the first housing having a protrusion direction that does not coincide with the first direction, the protrusion being snap-fit within the recess;

the first direction is a direction in which the first housing and the second housing are separated from each other.

8. The power meter of any one of claims 1-5, further comprising:

the mounting stud is arranged on the outer wall of the shell;

the mounting nut is in threaded connection with the mounting stud, and the mounting nut is a plastic piece.

9. An electrical power meter according to any of claims 1-5, wherein at least part of the metal part surface of the electrical power meter is provided with a galvanising layer.