CN218824459U - Current sensor - Google Patents

Abstract

The present application provides a current sensor comprising: the magnetic ring fixing piece is arranged in the outer shell and fixedly connected with the outer shell, the magnetic ring fixing piece is provided with a mounting groove, the magnetic ring fixing piece is arranged in the mounting groove, the sealing ring is arranged on the magnetic ring, and the magnetic ring fixing piece can fix the magnetic ring. Under the condition that new materials are not added, the magnetic ring can be replaced, the complex and tedious glue filling and fixing process is eliminated, the production period is shortened, and the production cost is saved.

Description

Current sensor

Technical Field

The application relates to the technical field of current sensors, in particular to a magnetic ring mounting structure of a current sensor.

Background

The current sensor is a detection device which can sense the information of the current to be detected and convert the sensed information into an electric signal meeting certain standard requirements or other required form information output according to a certain rule so as to meet the requirements of information transmission, processing, storage, display, record, control and the like. The current sensor is also called a magnetic sensor, can be used for household appliances, smart grids, electric vehicles, wind power generation and the like, and is used for a plurality of magnetic sensors in our lives, such as computer hard disks, compasses, household appliances and the like.

The relative position of current sensor magnetic ring and current sensor shell still need to keep unchangeable under adverse operating environment, generally uses the encapsulating to seal fixedly among the prior art, nevertheless because of production flow is too loaded down with trivial details, and glue needs curing time and then influences the production progress. Current sensor all is the integral type at present, can't change interior parts after damaging. Thus, there is a need for improvements in prior art current sensors.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a current sensor, under the condition that new materials are not added, through changing the shapes of a shell and a wiring terminal sealing ring, the bottom surface of the wiring terminal sealing ring can press a current sensor magnetic ring tightly in the current sensor shell, and therefore fixing is achieved.

In a first aspect, a current sensor is provided, which includes an outer casing, a magnetic ring fixing member, a magnetic ring and a sealing ring, wherein the magnetic ring fixing member is disposed in the outer casing and is fixedly connected to the outer casing, the magnetic ring fixing member is provided with a mounting groove, the magnetic ring is fixedly disposed in the mounting groove, the sealing ring is disposed on the magnetic ring, and when the magnetic ring fixing member is fixedly mounted on the outer casing, the magnetic ring can be fixed.

In the technical scheme, the outer shell, the magnetic ring fixing piece, the magnetic ring and the sealing ring are arranged to strengthen and fix the magnetic ring, so that the magnetic ring is simple and convenient to maintain and replace.

With reference to the first aspect, in one possible implementation manner, the magnetic ring is annular and includes a magnetic ring body and a notch portion.

With reference to the first aspect, in a possible implementation manner, the magnetic ring fixing member includes a housing, a mounting groove located in the housing, and a protruding portion located at a lower portion of the housing, where the mounting groove is configured to accommodate the magnetic ring and play a certain role in clamping the magnetic ring, and the mounting groove is substantially matched with the magnetic ring.

With reference to the first aspect, in a possible implementation manner, the magnetic ring fixing member further includes a first clamping portion and a second clamping portion, when the magnetic ring is installed on the magnetic ring fixing member, the first clamping portion is located at a central position of the magnetic ring, and the second clamping portion is located at the notch portion of the magnetic ring.

With reference to the first aspect, in a possible implementation manner, the protruding portion may be integrally formed with the housing.

With reference to the first aspect, in one possible implementation manner, the sealing ring is substantially cylindrical, the sealing ring has a circular bottom, and the size of the circular bottom of the sealing ring is substantially the same as that of the annular magnetic ring.

With reference to the first aspect, in one possible implementation manner, the seal ring cylindrical portion has a tooth portion.

With reference to the first aspect, in a possible implementation manner, the material of the sealing ring is rubber or plastic with a deformation capability.

With reference to the first aspect, in a possible implementation manner, a PCB is disposed between the magnetic ring fixing member and the outer casing, the PCB is fixedly connected to the outer casing, and the magnetic ring fixing member is fixedly connected to the PCB, so that the outer casing is indirectly and fixedly connected to the magnetic ring fixing member.

With reference to the first aspect, in a possible implementation manner, the protruding portion of the magnetic ring fixing member is positioned and mounted on a PCB.

In the technical scheme, the replacement of the magnetic ring is realized without adding new materials, the complex and fussy glue pouring fixing process is eliminated, the production period is shortened, and the production cost is saved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

Fig. 1 is a schematic structural view of a magnet ring according to some embodiments of the present application;

figure 2 is a first view schematic of a magnetic ring according to some embodiments of the present application;

FIG. 3 is a schematic view of a magnet ring fixture according to some embodiments of the present application;

FIG. 4 is a first schematic view of a magnet ring fixture according to some embodiments of the present application;

FIG. 5 is a schematic cross-sectional view of the magnet ring fixture of FIG. 4 taken along the direction B-B in accordance with some embodiments of the present application;

FIG. 6 is a schematic cross-sectional view of the fastener shown in FIG. 4 in a direction C-C of a magnetic ring according to some embodiments of the present application;

FIG. 7 is a first schematic view of a seal ring according to some embodiments of the present application;

FIG. 8 is a second schematic view of a seal ring according to some embodiments of the present application;

FIG. 9 is a schematic cross-sectional view of a seal ring according to some embodiments of the present application along the direction C-C;

FIG. 10 is a schematic view of a current sensor configuration according to some embodiments of the present application;

FIG. 11 is a cross-sectional view of a current sensor according to some embodiments of the present application.

An icon: 100-a current sensor; 10-a magnetic ring; 20-magnetic ring fixing part; 30-a sealing ring;

11-a magnetic ring body; 12-a notch portion; 21-magnetic ring fixing piece shell; 22-mounting grooves; 23-a boss;

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are merely used to more clearly illustrate the technical solutions of the present application, and therefore are only examples, and the protection scope of the present application is not limited thereby.

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 herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "including" and "having," and any variations thereof, in the description and claims of this application and the description of the above figures are intended to cover non-exclusive inclusions.

In the description of the embodiments of the present application, the technical terms "first", "second", and the like are used only for distinguishing different objects, and are not to be construed as indicating or implying relative importance or to implicitly indicate the number, specific order, or primary-secondary relationship of the technical features indicated. In the description of the embodiments of the present application, "a plurality" means two or more unless specifically defined otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase 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. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

In the description of the embodiments of the present application, the term "and/or" is only one kind of association relationship describing an associated object, and means that three relationships may exist, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

In the description of the embodiments of the present application, the term "plurality" refers to two or more (including two), and similarly, "plural sets" refers to two or more (including two), and "plural pieces" refers to two or more (including two).

In the description of the embodiments of the present application, the terms "center", "upper", "lower", "front", "rear", "vertical", "horizontal", "bottom", "inner", "outer", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for convenience of describing the embodiments of the present application and simplifying the description, but does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the embodiments of the present application.

In the description of the embodiments of the present application, unless otherwise explicitly specified or limited, the terms "connected," "connected," and "fixed" are used broadly and can be, for example, fixedly connected, detachably connected, or integrated; mechanical connection or electrical connection is also possible; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the embodiments of the present application can be understood by those of ordinary skill in the art according to specific situations.

According to some embodiments of the present application, fig. 1 is a schematic structural view of a magnetic ring 10 of some embodiments of the present application, and fig. 2 is a schematic first view of the magnetic ring 10 of some embodiments of the present application. As shown in fig. 1 and 2, the magnetic ring 10 is substantially circular, and includes a magnetic ring body 11 substantially shaped like a letter "C" and a notch 12.

According to some embodiments of the present application, fig. 3 is a schematic structural view of a magnetic ring fixture 20 according to some embodiments of the present application, fig. 4 is a schematic first view of the magnetic ring fixture 20 according to some embodiments of the present application, fig. 5 is a schematic sectional view of the magnetic ring fixture 20 shown in fig. 4 along a direction B-B according to some embodiments of the present application, and fig. 6 is a schematic sectional view of the fixture 20 shown in fig. 4 along a direction C-C in a magnetic ring according to some embodiments of the present application. As shown in fig. 1, the magnetic ring fixing member 20 includes a housing 21, a mounting groove 22 in the housing 21, and a protrusion 23 at a lower portion of the housing 21. The mounting groove 22 is used for accommodating the magnetic ring 10 and plays a certain role in clamping the magnetic ring 10, so that the mounting groove 22 is approximately matched with the magnetic ring 10. Generally, the fitting can be just capable of being installed, and there is almost no gap between the magnetic ring 10 and the installation groove 22 after the magnetic ring is installed in the installation groove 22, because the material of the shell 21 is generally plastic and has a certain deformation, the installation is simple, and only a certain force is needed. In some possible embodiments, the magnetic ring fixing member 20 further includes a first clamping portion 24 and a second clamping portion 25, when the magnetic ring 10 is installed on the magnetic ring fixing member 20, the first clamping portion 24 is located at a central position of the magnetic ring 10, and the second clamping portion 25 is located at the notch portion 12 of the magnetic ring 10, so that the magnetic ring fixing member 20 can better clamp the magnetic ring 10 to avoid shaking.

As shown in fig. 3, fig. 4 and fig. 5, the magnetic ring fixing member 20 further has a protrusion 23 located at a lower portion of the housing 21. A clamping groove 43 is correspondingly arranged in the lower shell 41 of the shell 40 of the current sensor 100, and when the magnetic ring fixing member 20 is installed in the shell 40, the protruding portion 23 is provided with the clamping groove 43 to fix the magnetic ring fixing member 20. In some embodiments, the protruding portion 23 may be integrally formed with the housing 21, so as to better ensure the retaining firmness.

According to some embodiments of the present disclosure, fig. 7 is a schematic view of a seal ring 30 according to some embodiments of the present disclosure, fig. 8 is a schematic view of a seal ring 30 according to some embodiments of the present disclosure, and fig. 9 is a schematic cross-sectional view of a seal ring 30 according to some embodiments of the present disclosure along a direction C-C. The compressible terminal sealing ring can generate constant pressure on the position-limited current sensor magnetic ring when being applied with constant force by the housing, so as to compress and fix the current sensor magnetic ring, and specifically, after the compressible sealing ring 30 is installed in the housing 40 of the current sensor 100, the compressible sealing ring can generate constant pressure on the position-limited current sensor magnetic ring 10 when being applied with constant pressure on the lower housing 41 by the upper housing 42 of the housing 40 of the current sensor 100, so as to compress and fix the current sensor magnetic ring 10. The sealing ring 30 is substantially cylindrical and, as shown in fig. 7, the circular base is substantially the same size as the magnetic ring 10. The material of the sealing ring 30 may be a material with certain deformability, such as rubber or plastic. As shown in fig. 8 and 9, the cylindrical portion of the sealing ring 30 has irregular teeth 31, and the teeth 31 may have a certain frictional resistance with the housing 40 after installation, thereby providing a better fixing effect.

According to some embodiments of the present application, fig. 10 is a schematic structural diagram of a current sensor according to some embodiments of the present application, and fig. 11 is a schematic structural diagram of a cut-away view of a current sensor according to some embodiments of the present application. As shown in the figure, the bottom surface of the terminal sealing ring 30 can be tightly pressed against the current sensor magnetic ring in the current sensor housing to be fixed by changing the shapes of the outer housing 40 and the sealing ring 30 without adding new materials. Specifically, the magnetic ring 10 is installed in the outer casing 40 of the current sensor, and then the sealing ring is pressed down onto the current sensor magnetic ring 10 through the outer casing 40, because the position of the current sensor casing is fixed, the pressed-down sealing ring 30 can press and fix the current sensor magnetic ring 10, so that the relative position of the current sensor magnetic ring and the current sensor casing can be kept unchanged in a severe working environment, and the current sensor magnetic ring 10 can be replaced. In other words, the compressible terminal sealing ring 30 can generate a constant downward force on the position-limited current sensor magnetic ring when receiving the constant downward force from the housing, so as to compress and fix the current sensor magnetic ring. Under the condition that new materials are not added, a complex and tedious glue pouring fixing process is eliminated, the production period is shortened, the production cost is saved, and the magnetic ring can be replaced.

The magnetic ring installation fixing structure has universality and can be used for installation of a magnetic ring of a general current sensor. In some possible embodiments, a PCB is disposed between the magnetic ring fixture 20 and the outer casing 40, the PCB is fixedly connected to the outer casing 40, and the magnetic ring fixture 20 is fixedly connected to the PCB, so that the outer casing 40 is indirectly fixedly connected to the magnetic ring fixture 20. Because this application mainly discusses the installation fixed mode of magnetic ring and its be convenient for can dismantle the change, the PCB board with shell body 40 fixed connection and magnetic ring mounting 20 with PCB board fixed connection does not give unnecessary details. In some possible embodiments, the protruding portion of the magnetic ring fixing member is positioned and mounted on a PCB board, and the PCB board has a mounting portion corresponding thereto, which is not limited herein.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (10)

1. A current sensor (100), comprising: the magnetic ring comprises an outer shell (40), a magnetic ring fixing piece (20), a magnetic ring (10) and a sealing ring (30), wherein the magnetic ring fixing piece (20) is arranged in the outer shell (40) and fixedly connected with the outer shell, the magnetic ring fixing piece is provided with a mounting groove (22), the magnetic ring (10) is fixedly arranged in the mounting groove (22), the sealing ring (30) is arranged on the magnetic ring (10), and when the magnetic ring fixing piece (20) is fixedly arranged on the outer shell (40), the magnetic ring (10) can be fixed.

2. The current sensor according to claim 1, wherein the magnetic ring (10) is annular and comprises a magnetic ring body (11) and a notch portion (12).

3. The current sensor according to claim 2, wherein the magnetic ring holder (20) comprises a housing (21), a mounting groove (22) in the housing, and a protrusion (23) at a lower portion of the housing (21), wherein the mounting groove (22) is used for accommodating the magnetic ring (10) and playing a certain retaining role for the magnetic ring (10).

4. The current sensor according to claim 3, wherein the magnetic ring fixture (20) further comprises a first retaining portion (24) and a second retaining portion (25), the first retaining portion (24) is located at a central position of the magnetic ring (10) and the second retaining portion (25) is located at the notch portion (12) of the magnetic ring (10) when the magnetic ring (10) is installed on the magnetic ring fixture (20).

5. Current sensor according to claim 3, characterized in that the boss (23) can be integrally formed with the housing (21).

6. Current sensor according to claim 2, characterized in that the sealing ring (30) is substantially cylindrical, having a circular bottom, the circular bottom of the sealing ring (30) being dimensioned to fit the annular magnetic ring (10).

7. Current sensor according to claim 6, characterized in that the sealing ring (30) cylinder has teeth (31).

8. The current sensor according to claim 6 or 7, wherein the material of the sealing ring (30) is rubber or plastic with deformation capability.

9. The current sensor according to any one of claims 3 to 5, wherein a PCB is disposed between the magnetic ring fixture (20) and the outer casing (40), the PCB is fixedly connected to the outer casing (40), and the magnetic ring fixture (20) is fixedly connected to the PCB, so as to realize indirect fixed connection between the outer casing (40) and the magnetic ring fixture (20).

10. The current sensor according to claim 9, wherein the boss (23) is position-mounted to a PCB board.

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