A current sensor

Abstract

The utility model relates to the technical field of current sensors, and specifically to a current sensor, the current sensor comprising an injection-molded shell, on which a conductive row extending in a left-right direction is integrally fixed, the injection-molded shell has a rear mounting groove at the rear side of the conductive row, a circuit board assembly is fixed in the rear mounting groove, the circuit board assembly has a circuit board and a sensing element, the front end of the injection-molded shell has a mounting surface, the mounting surface is integrally fixed with an output terminal, the output terminal is conductively connected to the circuit board, and also comprises a protective base, which is located at a root position where the conductive row is connected to an outer side surface of the injection-molded shell, and is arranged to protrude from the outer side surface of the injection-molded shell to protect the root position; by adding the protective base, the risk of connection failure between the conductive row and the injection-molded shell is reduced, and the technical problem that the root position where the conductive row of the current sensor is connected to the injection-molded shell lacks protection in the prior art, resulting in easy failure of the connection between the two.

Description

Technical Field

[0001] The utility model relates to the technical field of current sensors, in particular to a current sensor. Background Art

[0002] A current sensor is a device used to measure the magnitude of current. It monitors and controls the current by converting the current into a measurable signal. Current sensors are usually composed of sensing elements, signal processing circuits, and output interfaces. The sensing elements can be current transformers, Hall effect sensors, magnetoresistive sensors, etc. According to different principles and structures, current sensors can achieve different measurement ranges and accuracies.

[0003] The working principle of current sensor is based on Ampere's law, that is, there is an interaction between the current of a conductor and the surrounding magnetic field. Current sensor uses this interaction to measure current. There are two common working principles of current sensors: electromagnetic induction principle and Hall effect principle.

[0004] A common current sensor can refer to the utility model patent document with authorization announcement number CN218158105U, which discloses a current sensor with a built-in conductive bar. The current sensor includes an injection molded shell, on which a conductive bar extending in the left and right directions is integrally fixed, the conductive bar has two left and right connection ends and a sensing section in the middle, and the rear side of the conductive bar on the injection molded shell is provided with a rear mounting groove; a C-shaped iron core, which is integrally fixed in the injection molded shell, and the notch of the C-shaped iron core is arranged rearward and is correspondingly mounted outside the corresponding sensing section; a circuit board assembly, which is fixed in the rear mounting groove, and a rear cover is provided at the notch of the rear mounting groove, the circuit board assembly has a circuit board and a sensing element, and the front end of the injection molded shell has a mounting surface, and the mounting surface is integrally fixed with an output terminal, and the output terminal is conductively connected to the circuit board to output the current change on the conductive bar.

[0005] During actual installation and use, the conductive bar is fixed integrally in the injection-molded shell, and the root position where it is connected to the outer side of the injection-molded shell lacks protection. This is one of the direct causes of the failure of the connection between the conductive bar and the injection-molded shell. How to improve the protection of the root position where the conductive bar is connected to the injection-molded shell is a technical problem that needs to be urgently solved by technical personnel in this field. Utility Model Content

[0006] The utility model provides a current sensor to solve the technical problem in the prior art that the root position where the conductive bar of the current sensor is connected to the injection molded shell lacks protection, resulting in easy failure of the connection between the two.

[0007] In order to solve the above problems, the current sensor provided by the utility model adopts the following technical solutions:

[0008] A current sensor, comprising an injection molded housing, on which a conductive row extending in the left-right direction is integrally fixed, the rear side of the conductive row on the injection molded housing has a rear mounting groove, a circuit board assembly is fixed in the rear mounting groove, the circuit board assembly has a circuit board and a sensing element, the front end of the injection molded housing has a mounting surface, the mounting surface is integrally fixed with an output terminal, the output terminal is conductively connected to the circuit board, and further comprising:

[0009] The protective base is located at the root position where the conductive bar is connected to the outer side surface of the injection-molded shell, and is arranged to protrude from the outer side surface of the injection-molded shell to protect the root position.

[0010] The beneficial effect of the current sensor provided by the utility model is that by adding a protective base, further protection is actually provided for the conductive bar at the root position, so that the strength of the root position is increased, and the risk of connection failure between the conductive bar and the injection molded shell is reduced, thereby solving the technical problem in the prior art that the root position where the conductive bar of the current sensor is connected to the injection molded shell lacks protection, resulting in easy failure of the connection between the two.

[0011] Furthermore, the protective base and the injection-molded housing are an integrally formed structure. The integrally formed structure has the advantage of being easy to process.

[0012] Furthermore, the protection base includes a plurality of single seats, and the number of the single seats matches the number of the conductive bars so that the corresponding conductive bars can pass through.

[0013] Furthermore, the length and width of each single seat are respectively greater than the length and width of the conductive bar.

[0014] Further, one of the length and width dimensions of each single seat is the same as the corresponding dimension of the conductive bar, and the other dimension is larger than the corresponding dimension of the conductive bar.

[0015] Furthermore, the number of the monomer seats is three, and the three monomer seats are on a reference line to facilitate positioning and processing.

[0016] Furthermore, at least one of the two ends of each monomer seat in the length direction is chamfered, which improves the smoothness and safety of the end of the monomer seat.

[0017] Furthermore, among the three monomer seats, the middle monomer seat is centrally arranged, and the remaining two monomer seats are integrally formed with the injection-molded shell and the mounting ring plate at the end of the injection-molded shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] By reading the detailed description below with reference to the accompanying drawings, the above and other purposes, features and advantages of the exemplary embodiments of the present invention will become easy to understand. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0019] Figure 1 A three-dimensional schematic diagram of the current sensor provided by the utility model Figure 1 ;

[0020] Figure 2 A three-dimensional schematic diagram of the current sensor provided by the utility model Figure 2 ;

[0021] Figure 3 A three-dimensional schematic diagram of the current sensor provided by the utility model Figure 3 .

[0022] Description of reference numerals:

[0023] 1. Injection molded housing; 2. Conductive bar; 3. Circuit board; 4. Output terminal; 5. Protective base; 6. Monomer seat; 7. Arc-shaped part; 8. Mounting ring plate. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Those skilled in the art should know that the embodiments described below are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0025] It should be noted that the main idea of ​​the present invention is that, by adding a protective base, further protection is actually provided for the conductive bar at the root position, so that the strength of the root position is increased, and the risk of connection failure between the conductive bar and the injection molded shell is reduced, so as to solve the technical problem in the prior art that the root position where the conductive bar of the current sensor is connected to the injection molded shell lacks protection, resulting in easy failure of the connection between the two.

[0026] After introducing the basic principle of the utility model, various non-limiting embodiments of the utility model are specifically introduced below. Any number of elements in the drawings is for illustration and not for limitation, and any naming is only for distinction and does not have any limiting meaning.

[0027] The principle and spirit of the present invention are explained in detail below with reference to several representative embodiments of the present invention.

[0028] Embodiment 1 of the current sensor provided by the utility model:

[0029] like Figures 1 to 3 As shown, a current sensor includes an injection molded shell, on which a conductive row extending in the left-right direction is integrally fixed, the rear side of the conductive row on the injection molded shell has a rear mounting groove, a circuit board assembly is fixed in the rear mounting groove, the circuit board assembly has a circuit board and a sensing element, the front end of the injection molded shell has a mounting surface, the mounting surface is integrally fixed with an output terminal, and the output terminal is conductively connected to the circuit board.

[0030] On this basis, a protective base is also included, which is located at the root position where the conductive bar is connected to the outer side of the injection-molded shell, and is protruded from the outer side of the injection-molded shell to protect the root position.

[0031] Regarding the processing mode of the protective base, the protective base and the injection molded housing are an integrally formed structure, which has the advantage of being easy to process.

[0032] Regarding the arrangement of the protection base, the protection base includes a plurality of single bases, the number of which matches the number of conductive bars, so that the corresponding conductive bars can pass through.

[0033] There are two ways to set the size of the monomer seat. One is that the length and width of each monomer seat are respectively larger than the length and width of the conductive bar. The other is that one of the length and width of each monomer seat is the same as the corresponding size of the conductive bar, and the other is larger than the corresponding size of the conductive bar.

[0034] In addition, at least one of the two ends of each monomer seat in the length direction is chamfered to form an arc-shaped portion, and the chamfering improves the smoothness and safety of the end of the monomer seat.

[0035] Finally, among the three single-body seats, the middle single-body seat is centrally arranged, and the remaining two single-body seats are integrally formed with the injection-molded shell and the mounting ring plate at the end of the injection-molded shell.

[0036] The working principle of the current sensor provided by the utility model is as follows: during the injection molding of the shell, a protective base is integrally processed. By adding the protective base, further protection is actually provided for the conductive bar at the root position, so that the strength at the root position is increased, and the risk of connection failure between the conductive bar and the injection molding shell is reduced, so as to solve the technical problem that the root position where the conductive bar of the current sensor is connected to the injection molding shell lacks protection, resulting in the connection between the two being prone to failure.

[0037] Embodiment 2 of the current sensor provided by the utility model:

[0038] The main difference between it and Example 1 is:

[0039] In Example 1, the number of the monomer seats is three, and the three monomer seats are on a reference line to facilitate positioning and processing.

[0040] In this embodiment, the number of the single-body seats may not be three, but may be adjusted according to actual working conditions.

[0041] Embodiment 3 of the current sensor provided by the utility model:

[0042] The main difference between it and Example 1 is:

[0043] In Embodiment 1, the protection base includes a plurality of single-body seats, and the number of the single-body seats matches the number of the conductive bars so that the corresponding conductive bars can pass through.

[0044] In this embodiment, the protective base is a complete structure and is no longer divided into parts.

[0045] According to the above description of this specification, those skilled in the art may also understand that the terms used below, such as "up", "down", "front", "back", "left", "right", "width", "horizontal", "top", "bottom", "inside", "outside" and other terms indicating orientation or position relationship are based on the orientation or position relationship shown in the drawings of this specification, which are only for the purpose of facilitating the explanation of the scheme of the utility model and simplifying the description, rather than explicitly or implicitly indicating that the device or element involved must have the specific orientation, be constructed and operate in a specific orientation. Therefore, the above-mentioned orientation or position relationship terms cannot be understood or interpreted as limitations on the scheme of the utility model.

[0046] In addition, in the description of this specification, “plurality” means at least two, for example, two, three or more, etc., unless otherwise clearly and specifically defined.

Claims

1. A current sensor, comprising an injection molded housing, on which a conductive row extending in the left-right direction is integrally fixed, the rear side of the conductive row on the injection molded housing has a rear mounting groove, a circuit board assembly is fixed in the rear mounting groove, the circuit board assembly has a circuit board and a sensing element, the front end of the injection molded housing has a mounting surface, the mounting surface is integrally fixed with an output terminal, the output terminal is conductively connected to the circuit board, and the characteristics are as follows: Also includes: The protective base is located at the root position where the conductive bar is connected to the outer side surface of the injection-molded shell, and is arranged to protrude from the outer side surface of the injection-molded shell to protect the root position.

2. The current sensor according to claim 1, characterized in that: The protective base and the injection-molded shell are an integrally formed structure.

3. The current sensor according to claim 2, characterized in that: The protection base includes a plurality of single seats, the number of which matches the number of conductive bars, so that the corresponding conductive bars can pass through.

4. The current sensor according to claim 3, characterized in that: The length and width of each single seat are respectively greater than the length and width of the conductive bar.

5. The current sensor according to claim 3, characterized in that: One of the length and width dimensions of each single seat is the same as the corresponding dimension of the conductive bar, and the other dimension is larger than the corresponding dimension of the conductive bar.

6. The current sensor according to any one of claims 3 to 5, characterized in that: The number of the single body seats is three, and the three single body seats are on a reference line to facilitate positioning and processing.

7. The current sensor according to any one of claims 3 to 5, characterized in that: At least one of the two end portions of each monomer seat in the length direction is chamfered.

8. The current sensor according to claim 6, characterized in that: Among the three monomer seats, the middle monomer seat is centrally arranged, and the remaining two monomer seats are integrally formed with the injection-molded shell and the mounting ring plate at the end of the injection-molded shell.

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