Current sensor magnetic core gap fixing and PCB positioning structure

Abstract

The utility model relates to the technical field of sensors, in particular to a magnetic core gap fixing and PCB (printed circuit board) positioning structure of a current sensor, which comprises a framework, a magnetic core penetrating hole is arranged in the framework, double fulcrums are fixedly connected in the magnetic core penetrating hole, double magnetic cores are mounted in the magnetic core penetrating hole, and a PCBA (printed circuit board assembly) is mounted on one side of the framework. According to the magnetic core gap fixing and PCB positioning structure of the current sensor, interference fit between the double magnetic cores and the magnetic core penetrating holes in the framework can be realized through mounting the framework, stable matching of the magnetic cores and the framework can be ensured without Z-direction and X-direction offset after the double magnetic cores are oppositely inserted, meanwhile, two 0.5 mm * 0.5 mm L-shaped PINs are additionally arranged on the framework and are inserted into the framework to be fixed, and then bent parts are welded on a PCBA (Printed Circuit Board Assembly). And the interference fit rib position and the limiting magnetic core are additionally arranged on the shell to ensure that the magnetic core does not deviate in the Y direction, so that the magnetic core does not displace after being installed, a stable structure in the X direction, the Y direction and the Z direction is realized, and a guarantee is provided for the stability of a product.

Description

Technical Field

[0001] The utility model relates to the technical field of sensors, in particular to a current sensor magnetic core gap fixing and PCB positioning structure. Background Art

[0002] The CR1V sensor is primarily composed of a PCBA, a cross-dual magnetic core, a winding bobbin, a housing, and a top cover. The PCBA, housing, magnetic core, and bobbin are stacked together. The sensor is designed without glue potting. Furthermore, the sensor needs to have a certain degree of vibration resistance, so the internal structure must be stable to ensure stable sensor performance under vibration conditions after assembly.

[0003] When the original core and bobbin were designed with a single-point interference fit, the relative position of the core and bobbin could not be guaranteed during assembly. After stacking, there was no PCBA or fixation, and the sensor assembly consistency could not be guaranteed by relying solely on the interference fit method. This caused the Hall element and the core opening position to easily shift, resulting in different test values for different products and affecting production. Utility Model Content

[0004] The purpose of the present invention is to provide a current sensor core gap fixing and PCB positioning structure, so as to solve the problem proposed in the above background technology that the consistency of the position of the PCBA, the magnetic core and the skeleton cannot be guaranteed after installation. In order to achieve the above purpose, the present invention provides the following technical solutions: a current sensor core gap fixing and PCB positioning structure, comprising a skeleton, a core passing hole is provided inside the skeleton, a double fulcrum is fixedly connected inside the core passing hole, a double core is installed inside the core passing hole, a PCBA is installed on one side of the skeleton, a rod hole is provided inside the PCBA, an L-shaped PIN needle is installed inside the rod hole, one end of the L-shaped PIN needle passes through the PCBA and extends to the other side of the PCBA, the other end of the L-shaped PIN needle is clamped inside the skeleton, a limiting core is installed on one side of the PCBA, a shell is installed on one side of the limiting core, and one side of the shell is fixedly connected with an interference fit. The rib position can be achieved by installing the skeleton, so that the dual cores can be interference fit with the core holes in the skeleton. After the dual cores are inserted, the cores and the skeleton can be stably matched without Z- and X-direction deviation. At the same time, two 0.5mm*0.5mm L-shaped PIN needles are added to the skeleton and inserted into the skeleton for fixation. The bent part is then welded to the PCBA to ensure the position accuracy of the PCBA and the skeleton. Then, interference fit ribs are added to the shell to limit the core and ensure that the core has no Y-direction deviation. Through the above design, the position accuracy of all directions is guaranteed to be consistent when the core, PCBA, and skeleton are stacked, ensuring product consistency. Furthermore, in the stacking design, without glue filling, it is guaranteed that the core will not move after installation, realizing an XYZ three-dimensional stable structure, which provides a guarantee for product stability.

[0005] Compared with the prior art, the present invention has the following beneficial effects:

[0006] In the present invention, by installing the skeleton, the dual magnetic cores can be made to have an interference fit with the core-through holes in the skeleton. After the dual magnetic cores are inserted into each other, the magnetic cores and the skeleton can be stably matched without Z- and X-direction offsets. At the same time, two 0.5mm*0.5mm L-shaped PIN needles are added to the skeleton and inserted into the skeleton for fixation. The bent part is then welded to the PCBA to ensure the position accuracy of the PCBA and the skeleton. Then, interference fit ribs are added to the shell to limit the magnetic core and ensure that the magnetic core has no Y-direction offset. Through the above design, the position accuracy of all directions is guaranteed to be consistent when the magnetic core, PCBA, and skeleton are stacked, ensuring product consistency. Furthermore, in the stacking design, without glue filling, it is guaranteed that the magnetic core will not be displaced after installation, realizing an XYZ three-dimensional stable structure, which provides a guarantee for product stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model Figure 1 ;

[0008] Figure 2 This is a schematic diagram of a partial three-dimensional structure of the utility model;

[0009] Figure 3 For this utility model Figure 2 A in the middle is an enlarged structural diagram;

[0010] Figure 4 For this utility model Figure 2 The enlarged structural diagram at B in the middle;

[0011] Figure 5 This is a schematic diagram of the three-dimensional structure of the utility model Figure 2 .

[0012] In the figure: 1. Skeleton; 2. Hole for inserting the magnetic core; 3. Double fulcrums; 4. Double magnetic core; 5. PCBA; 6. Hole for inserting the rod; 7. L-shaped PIN needle; 8. Limiting magnetic core; 9. Shell; 10. Interference fit rib. DETAILED DESCRIPTION

[0013] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technical personnel in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0014] See also Figure 1-Figure 5The utility model provides a technical solution: a current sensor core gap fixing and PCB positioning structure, including a skeleton 1, a core penetration hole 2 is opened inside the skeleton 1, a double support point 3 is fixedly connected inside the core penetration hole 2, a double magnetic core 4 is installed inside the core penetration hole 2, a PCBA 5 is installed on one side of the skeleton 1, a rod hole 6 is opened inside the PCBA 5, an L-shaped PIN needle 7 is installed inside the rod hole 6, one end of the L-shaped PIN needle 7 passes through the PCBA 5 and extends to the other side of the PCBA 5, the other end of the L-shaped PIN needle 7 is clamped inside the skeleton 1, a limiting magnetic core 8 is installed on one side of the PCBA 5, and a shell 9 is installed on one side of the limiting magnetic core 8. One side of 9 is fixedly connected with an interference fit rib 10. By installing the skeleton 1, the dual magnetic core 4 can be interference fit with the core hole 2 in the skeleton 1. After the dual magnetic core 4 is inserted, it can ensure that the magnetic core and the skeleton 1 are stably matched without Z-direction and X-direction offset. At the same time, two 0.5mm*0.5mm L-shaped PIN needles 7 are added to the skeleton 1, which are inserted into the skeleton 1 for fixation, and then the bent part is welded to the PCBA5 to ensure the position accuracy of the PCBA5 and the skeleton 1. Then the shell 9 adds an interference fit rib 10 to limit the magnetic core 8 to ensure that the magnetic core has no Y-direction offset. Through the above design, it is ensured that when the magnetic core, PCBA5, and skeleton 1 are stacked, the position accuracy of each direction is guaranteed to be consistent, thereby ensuring product consistency.

[0015] The use method and advantages of this utility model: The current sensor core gap fixing and PCB positioning structure, when in use, the working process is as follows:

[0016] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 As shown, first, by installing the skeleton 1, the dual magnetic core 4 can be made to have an interference fit with the magnetic core hole 2 in the skeleton 1. After the dual magnetic core 4 is inserted, it can ensure that the magnetic core and the skeleton 1 are stably matched without Z-direction and X-direction offset. At the same time, two 0.5mm*0.5mm L-shaped PIN needles 7 are added to the skeleton 1, which are inserted into the skeleton 1 for fixation, and then the bent part is welded to the PCBA5 to ensure the position accuracy of the PCBA5 and the skeleton 1. Then the shell 9 adds interference fit ribs 10 to limit the magnetic core 8 to ensure that the magnetic core has no Y-direction offset. Through the above design, it is ensured that when the magnetic core, PCBA5, and skeleton 1 are stacked, the position accuracy of each direction is guaranteed to be consistent, thereby ensuring product consistency.

[0017] The above shows and describes the basic principles, main features, and advantages of the present invention. Persons skilled in the art should understand that the present invention is not limited to the above-described embodiments. The above-described embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A current sensor core gap fixing and PCB positioning structure, comprising a skeleton (1), characterized in that: A magnetic core hole (2) is provided inside the skeleton (1), a double support point (3) is fixedly connected inside the magnetic core hole (2), a double magnetic core (4) is installed inside the magnetic core hole (2), a PCBA (5) is installed on one side of the skeleton (1), a rod hole (6) is provided inside the PCBA (5), an L-shaped PIN needle (7) is installed inside the rod hole (6), one end of the L-shaped PIN needle (7) passes through the PCBA (5) and extends to the other side of the PCBA (5), and the other end of the L-shaped PIN needle (7) is clamped inside the skeleton (1).

2. The current sensor magnetic core gap fixing and PCB positioning structure according to claim 1, characterized in that: A limiting magnetic core (8) is installed on one side of the PCBA (5), a housing (9) is installed on one side of the limiting magnetic core (8), and an interference fit rib (10) is fixedly connected to one side of the housing (9).

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