Filtering and noise-reducing rod-shaped inductor

Abstract

The utility model discloses a rod-shaped inductor for filtering and noise reduction, which relates to the technical field of inductors and comprises an inductor body, the inductor body comprises a magnetic rod and an enamelled wire wound on the outer side wall of the magnetic rod, the outer wall of the magnetic rod is provided with insulating paint which is abutted against the inner wall of the enamelled wire in a matched manner, and a plurality of insulating particles which are abutted against the enamelled wire in a matched manner are arranged in the insulating paint. Before the enamelled wire is wound outside the magnetic bar, the magnetic bar is immersed in the insulating paint with the insulating particles, the insulating particles and the insulating paint can enhance the roughness of the outer surface of the magnetic bar, the contact and adhesive area between the magnetic bar and the enamelled wire is increased, the adhesion degree is increased, the magnetic bar and the enamelled wire are not easy to loosen, and the service life of the magnetic bar is prolonged. Therefore, the rod-shaped inductor can pass the acceptance standard of a vehicle enterprise, the enameled wire can be connected with a circuit of a filter through the pins on the two sides, the magnetic rod and the enameled wire which are suspended in the middle can be supported after the pins on the two sides are fixed through supporting of components such as the insulating supporting plate, and the stability of the inductor after installation is improved.

Description

Technical Field

[0001] This utility model relates to the field of inductor technology, and in particular to a filter noise reduction rod-shaped inductor. Background Technology

[0002] A filter is a filtering circuit composed of capacitors, inductors, and resistors. A filter can effectively filter out specific frequencies or frequencies outside of a power supply line to obtain a power signal of a specific frequency, or eliminate a power signal of a specific frequency.

[0003] Rod inductors are a common structure in filters. They are made by winding enameled coils onto an insulating rod. They have a simple structure and inherent noise reduction capabilities. The main functions of rod inductors include noise reduction, signal filtering, current stabilization, and suppression of electromagnetic interference, thus exhibiting filtering and noise reduction characteristics.

[0004] A coil is wound around the outer edge of a magnetic rod. To secure the coil, the coil and the magnetic rod are usually glued together. However, when their positions change or vibration occurs during startup, the contact area between the magnetic rod and the coil is small due to their cylindrical shape and smooth surface. This makes them prone to loosening after gluing. While rod-shaped inductors used in household appliances can meet standards by gluing because they don't move, they need to pass the standards of car manufacturers when used in automobiles. During the acceptance testing, car manufacturers conduct vibration resistance tests on rod-shaped inductors. Glue-glued rod-shaped inductors are prone to loosening and fail to meet product standards, thus requiring improvement. Utility Model Content

[0005] This invention addresses the shortcomings of existing technologies by providing a filtering and noise-reducing rod-shaped inductor. The specific technical solution is as follows:

[0006] A filtering and noise-reducing rod-shaped inductor includes an inductor body, which includes a magnetic rod and an enameled wire wound on the outer wall of the magnetic rod. The outer wall of the magnetic rod is provided with an insulating varnish that abuts against the inner wall of the enameled wire. The insulating varnish contains a plurality of insulating particles that abut against the enameled wire.

[0007] By adopting the above technical solution, before winding the enameled wire around the outside of the magnetic rod, the magnetic rod is immersed in insulating varnish containing insulating particles. The insulating particles and insulating varnish can enhance the roughness of the outer surface of the magnetic rod and increase the contact and adhesive area between the magnetic rod and the enameled wire, thereby increasing the adhesion and making it less likely for the magnetic rod and the enameled wire to loosen. This allows the rod-shaped inductor to pass the acceptance standards of car manufacturers.

[0008] Optionally, the enameled wire is fixed with two pins at both ends.

[0009] By adopting the above technical solution, the enameled wire can be connected to the circuit of an external filter through the pins on both sides.

[0010] Optionally, the bottom of the inductor is provided with an insulating support plate for supporting the enameled wire.

[0011] By adopting the above technical solution, after the pins on both sides of the inductor are fixed, the middle part of the inductor is usually suspended. At this time, the insulating support plate can support the magnetic rod and enameled wire that are suspended in the middle, thereby improving the stability of the rod inductor after installation.

[0012] Optionally, a reset spring is fixedly provided at the bottom of the insulating tray.

[0013] By adopting the above technical solution, the return spring can provide elastic support for components such as the insulating support plate. Because the return spring is elastic, it is convenient for the insulating support plate to lift and support the middle part of the inductor at different heights.

[0014] Optionally, the bottom of the reset spring is fixedly provided with a base plate for installation inside an external filter.

[0015] By adopting the above technical solution, the base plate can support components such as the return spring.

[0016] Optionally, the top of the insulating tray has a groove that matches the bottom of the enameled wire.

[0017] By adopting the above technical solution, the insulating tray can limit the bottom end of the matching enameled wire through the groove, thereby improving the connection strength between the enameled wire and the insulating tray.

[0018] In summary, this utility model has at least one of the following beneficial effects:

[0019] 1. Before winding the enameled wire around the outside of the magnetic rod, the magnetic rod is immersed in insulating varnish containing insulating particles. The insulating particles and insulating varnish can enhance the roughness of the outer surface of the magnetic rod and increase the contact and adhesive area between the magnetic rod and the enameled wire, thereby increasing the adhesion and making it less likely for the magnetic rod and the enameled wire to loosen. This allows the rod-shaped inductor to pass the acceptance standards of car manufacturers.

[0020] 2. The enameled wire can be connected to the filter circuit through the pins on both sides. The inductor composed of the magnetic rod and the enameled wire itself has the characteristics of filtering and noise reduction. With the support of components such as the insulating plate and the return spring, the magnetic rod and enameled wire suspended in the middle can be supported after the pins on both sides are fixed, which improves the stability of the inductor after installation. The insulating plate can limit the bottom end of the matching enameled wire through the groove, which improves the connection strength between the enameled wire and the insulating plate. Attached Figure Description

[0021] Figure 1This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the overall structure and internal layout of this utility model;

[0023] Figure 3 This is the utility model Figure 2 Enlarged view of the A-structure in the middle;

[0024] Figure 4 This is a frontal view of the insulating tray of this utility model.

[0025] Explanation of reference numerals in the attached diagram: 1. Magnetic rod; 11. Insulating varnish; 12. Insulating particles; 2. Enamelled wire; 21. Lead; 3. Insulating support plate; 31. Return spring; 32. Base plate; 33. Groove. Detailed Implementation

[0026] The following is in conjunction with the appendix Figure 1-4 The present invention will be described in further detail below.

[0027] This utility model discloses a filtering and noise reduction rod-shaped inductor, referencing... Figure 1-2 The inductor includes a magnetic rod 1 and an enameled wire 2. The enameled wire 2 is wound on the outer wall of the magnetic rod 1 to form a coil. The magnetic rod 1 and the enameled wire 2 form the existing rod-shaped inductor, which itself has the function of filtering and noise reduction. This is a public technology and will not be described in detail here. This rod-shaped inductor can be applied to the noise reduction filter of the wiper motor or the noise reduction filter of the car window lifting motor.

[0028] Reference Figure 1-3 The outer wall of the magnetic rod 1 is provided with insulating varnish 11 that abuts against the inner wall of the enameled wire 2. The insulating varnish 11 contains a number of insulating particles 12 that abut against the enameled wire 2. Before the enameled wire 2 is wound around the outside of the magnetic rod 1, the magnetic rod 1 is immersed in the insulating varnish 11 containing the insulating particles 12. The insulating particles 12 and the insulating varnish 11 can enhance the roughness of the outer surface of the magnetic rod 1 and increase the contact and adhesive area between the magnetic rod 1 and the enameled wire 2, increase the adhesion, and make it less likely for the magnetic rod 1 and the enameled wire 2 to loosen, so that the rod-shaped inductor can pass the standards of the car manufacturer's acceptance.

[0029] Reference Figure 1-3 The insulating particles 12 can be rubber particles or other particles with insulating rubber, and the insulating particles 12 and the insulating varnish 11 can insulate the magnetic rod 1, so that when the coils are densely stacked, the stacking connection point between the magnetic rod 1 and the enameled wire 2 is not prone to short circuit, thereby ensuring the stability and reliability of the coil.

[0030] Reference Figure 1-2The enameled wire 2 has two pins 21 fixed at both ends. The enameled wire 2 can be connected to the circuit of an external filter through the pins 21 on both sides. Tin plating can be used to connect the pins 21 to the circuit of the external filter, which is a public technology.

[0031] Reference Figure 1-2 The bottom of the inductor is provided with an insulating support plate 3 for supporting the enameled wire 2. After the pins 21 on both sides of the inductor are fixed, the middle part of the inductor is usually suspended. At this time, the insulating support plate 3 can support the magnetic rod 1 and the enameled wire 2 suspended in the middle, improving the stability of the rod inductor after installation.

[0032] Reference Figure 1-2 A reset spring 31 is fixedly provided at the bottom of the insulating support plate 3. The reset spring 31 can provide elastic support for the insulating support plate 3 and other components. Because the reset spring 31 is elastic, it is convenient for the insulating support plate 3 to lift and support the middle part of the inductor at different heights.

[0033] Reference Figure 1-2 The bottom of the reset spring 31 is fixedly provided with a base plate 32 for installation inside the external filter. The base plate 32 can be fixedly installed on the circuit board of the external filter by tin plating. The base plate 32 can support the reset spring 31 and other components.

[0034] Reference Figure 1 , Figure 2 and Figure 4 The top of the insulating support plate 3 is provided with a groove 33 that matches the bottom of the enameled wire 2. The insulating support plate 3 can limit the bottom end of the matching enameled wire 2 through the groove 33, thereby improving the connection strength between the enameled wire 2 and the insulating support plate 3 and improving the stability of the insulating support plate 3 when it is supported. The insulating support plate 3 can be made of insulating materials such as rubber that also have a certain strength.

[0035] The implementation principle of the filtering and noise reduction rod-shaped inductor in this embodiment of the utility model is as follows:

[0036] Before the enameled wire 2 is wound around the outside of the magnetic rod 1, the magnetic rod 1 is immersed in the insulating varnish 11 with insulating particles 12. The insulating particles 12 and the insulating varnish 11 can enhance the roughness of the outer surface of the magnetic rod 1 and increase the contact and adhesive area between the magnetic rod 1 and the enameled wire 2, increase the adhesion, and make it less likely for the magnetic rod 1 and the enameled wire 2 to loosen. This allows the rod-shaped inductor to pass the acceptance standards of car manufacturers. The inductor composed of the magnetic rod 1 and the enameled wire 2 has the characteristics of filtering and noise reduction.

[0037] During installation, the pins 21 on both sides of the enameled wire 2 can be connected to the circuit of the external filter by tin plating, and then the base plate 32 can be fixedly installed on the circuit board of the external filter by tin plating.

[0038] After the pins 21 on both sides of the inductor are fixed, the middle part of the inductor is usually suspended. At this time, the insulating plate 3 can support the magnetic rod 1 and the enameled wire 2 suspended in the middle under the elastic force of the reset spring 31, which improves the stability of the rod inductor after installation. In addition, the insulating plate 3 can limit the bottom end of the matching enameled wire 2 through the groove 33, which improves the connection strength between the enameled wire 2 and the insulating plate 3.

[0039] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A filtering and noise-reducing rod-shaped inductor, comprising an inductor body, said inductor body comprising a magnetic rod (1) and an enameled wire (2) wound on the outer wall of the magnetic rod (1), characterized in that: The outer wall of the magnetic rod (1) is provided with insulating varnish (11) that abuts against the inner wall of the enameled wire (2), and the insulating varnish (11) contains a number of insulating particles (12) that abut against the enameled wire (2).

2. The filtering and noise reduction rod-shaped inductor according to claim 1, characterized in that: The enameled wire (2) has two pins (21) fixed at both ends.

3. The filtering and noise reduction rod-shaped inductor according to claim 1, characterized in that: The bottom of the inductor is provided with an insulating support plate (3) for supporting the enameled wire (2).

4. The filtering and noise reduction rod-shaped inductor according to claim 3, characterized in that: A reset spring (31) is fixedly provided at the bottom of the insulating plate (3).

5. The filtering and noise reduction rod-shaped inductor according to claim 4, characterized in that: The bottom of the reset spring (31) is fixedly provided with a base plate (32) for installation inside the external filter.

6. The filtering and noise reduction rod-shaped inductor according to claim 5, characterized in that: The top of the insulating tray (3) is provided with a groove (33) that matches the bottom of the enameled wire (2).

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