Buckle fixing type common mode inductor
By using a snap-fit design for common mode inductors, and replacing traditional high-temperature baking with a flexible arm and slot structure, the problem of complex and unstable common mode inductor fixing processes is solved, thus simplifying production and improving product stability.
Patent Information
- Application Number
- CN202520254934.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-17
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2035-02-17
AI Technical Summary
The existing common mode inductor has a complicated fixing process, poor structural stability between the core and the shell, and is prone to separation under high temperature conditions. The lack of a fixing structure for the leads leads to inconsistent sizes.
The device employs a snap-fit fixing structure, using elastic arms and slots to secure the magnetic core and coil to the base, eliminating the need for traditional high-temperature baking fixing methods. The combination of elastic arms and slots achieves stable installation of the magnetic core and coil.
It simplifies the production process, improves production efficiency, avoids structural separation problems caused by high-temperature baking, and enhances product stability and production efficiency.
Smart Images
Figure CN223857981U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to inductance technical field especially relates to a buckle fixed mode common mode inductance. BACKGROUND
[0002] Common mode inductance, also called common mode choke, is a kind of electromagnetic element for suppressing common mode interference. Common mode inductance usually includes a magnetic core, which is integrally installed in a shell after winding a winding on the magnetic core. In the existing common mode inductance, the magnetic core and the shell are fixed by point gluing and high-temperature baking. The process is complicated, and because the shell is usually an insulating plastic part, and the magnetic core is a conductive metal part, the two materials are different, and the expansion coefficients are different. In a high-temperature environment, the shell will deform, which will cause the magnetic core and the shell to separate, affect the structural stability, and the lead-out wire of the winding has no fixing structure, and the PIN pin of the lead-out wire has no fixing point, which leads to different sizes. SUMMARY
[0003] The main purpose of the utility model is to provide a buckle fixed mode common mode inductance, which aims to solve the problem of complex fixing process and poor structural stability of the existing common mode inductance.
[0004] To achieve the above purpose, the utility model provides a buckle fixed mode common mode inductance, which comprises:
[0005] A magnetic core is arranged in a rectangular frame structure.
[0006] A coil winding is wound around the magnetic core, and the coil winding is provided with a lead-out wire.
[0007] A base is used to fix the magnetic core and the coil winding. The base is provided with a plurality of first elastic arms and a plurality of second elastic arms. The first elastic arms pass through the inside of the magnetic core, and the end portions of the first elastic arms are connected to the inside wall of the magnetic core. The second elastic arms are attached to the outside of the magnetic core, and the second elastic arms are connected to the outside wall of the magnetic core. The base is also provided with a clamping groove for clamping the lead-out wire.
[0008] Optionally, the first elastic arms are arranged in two, and the two first elastic arms are respectively connected to one set of symmetrical inside walls of the magnetic core.
[0009] Optionally, a deformation gap is arranged between the two first elastic arms.
[0010] Optionally, the end portion of the first elastic arm is provided with a clamping block connected to the inside wall of the magnetic core, and the outside of the clamping block extends axially along the guide slope of the first elastic arm.
[0011] Optionally, the second elastic arms are arranged in two, and the two second elastic arms are respectively connected to one set of symmetrical outside walls of the magnetic core.
[0012] Optionally, the second elastic arm is arranged in an arc shape.
[0013] Optionally, the inner diameter of the clamping groove is matched with the outer diameter of the lead-out wire, and the opening inner diameter of the clamping groove is smaller than the outer diameter of the lead-out wire.
[0014] Optionally, the opening of the clamping groove is symmetrically provided with an elastic protrusion, and the outer side surface of the elastic protrusion is arranged in an arc surface.
[0015] Optionally, the base is arranged in a plastic material one-piece forming structure.
[0016] Optionally, the coil winding is arranged in two groups, and the two groups of coil windings are symmetrically wound on the side wall of the magnetic core.
[0017] The beneficial effects of the utility model lie in that the traditional high-temperature baking fixing mode is cancelled, the magnetic core and the coil are stably fixed on the base through the fixing structure of the elastic arm and the clamping groove, the production process is simplified, and the production efficiency is improved. Meanwhile, the problems of base deformation and separation between the magnetic core and the base caused by the high-temperature baking process are avoided. BRIEF DESCRIPTION OF DRAWINGS
[0018] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to the structure shown in these drawings without creative labor.
[0019] Fig. 1 It is a whole structure schematic diagram of the utility model common mode inductor;
[0020] Fig. 2 It is an explosion diagram of the utility model common mode inductor structure;
[0021] Fig. 3 It is a base structure schematic diagram of the utility model;
[0022] Label explanation:
[0023] 1, magnetic core;
[0024] 2, coil winding; 21, lead-out wire;
[0025] 3, base; 31, first elastic arm; 311, deformation gap; 312, clamping block; 313, guide inclined surface; 32, second elastic arm; 33, clamping groove; 331, elastic protrusion.
[0026] The purposes, functional features and advantages of the utility model will be further explained in combination with embodiments and with reference to the drawings. DETAILED DESCRIPTION
[0027] The technical solutions in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.
[0028] It should be noted that if the embodiments of the utility model involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications also change accordingly.
[0029] In addition, if the embodiments of the utility model involve descriptions of "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features with "first" and "second" can explicitly or implicitly include at least one feature. In addition, the meaning of "and / or" appearing throughout the text is that it includes three parallel schemes, taking "A and / or B" as an example, including A scheme, or B scheme, or A and B schemes. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the utility model.
[0030] An embodiment of the utility model provides a buckle fixed type common mode inductor, referring to Figs. 1-3 , comprising:
[0031] The magnetic core 1 is arranged in a rectangular frame structure.
[0032] The coil winding 2 is wound on the magnetic core 1, and the coil winding 2 is provided with a lead wire 21.
[0033] A base 3 is used to fix the magnetic core 1 and the coil winding 2; the base 3 is provided with a plurality of first elastic arms 31 and a plurality of second elastic arms 32, the plurality of first elastic arms 31 pass through the inner side of the magnetic core 1, and the end of the plurality of first elastic arms 31 is clamped with the inner side wall of the magnetic core 1; the plurality of second elastic arms 32 are attached to the outer side of the magnetic core 1, and the plurality of second elastic arms 32 are clamped with the outer side wall of the magnetic core 1; the base 3 is also provided with a clamping groove 33 for clamping the lead wire 21.
[0034] In the embodiment, the magnetic core 1 is provided in a rectangular frame structure, which is convenient for winding the coil winding 2 and subsequent clamping and fixing with the base 3. The coil winding 2 is tightly wound on the magnetic core 1, which ensures the stability of the electromagnetic performance. One end or both ends of the coil winding 2 are provided with a lead wire 21 for connecting with an external circuit. The base 3 realizes the mechanical fixation of the magnetic core 1 through the first elastic arms 31 and the second elastic arms 32. The first elastic arms 31 pass through the inner side of the magnetic core 1, and the clamping block 312 at the end thereof is clamped with the inner side wall of the magnetic core 1 through elastic deformation, forming an internal clamping. The second elastic arms 32 are arc-shaped and are attached to the outer side wall of the magnetic core 1, and realize external clamping through elastic pressure. The opening inner diameter of the clamping groove 33 of the base 3 is slightly smaller than the outer diameter of the lead wire 21. During assembly, the lead wire 21 is pressed into the groove through the deformation of the elastic protrusion 331, and is fixed by interference fit. The traditional fixing methods of glue dispensing and high-temperature baking are cancelled, the production process is simplified, the production cost is reduced, the production efficiency is improved, and the stability of the product is higher.
[0035] Further, the first elastic arms 31 are provided in two, and the two first elastic arms 31 are clamped on one group of symmetrical inner side walls of the magnetic core 1. In the embodiment, the two first elastic arms 31 are symmetrically distributed on one group of inner side walls of the magnetic core 1, and the installation of the magnetic core 1 is completed by synchronous contraction inward, and then the magnetic core 1 is clamped tightly by elastic recovery outward. The symmetrical arrangement of the elastic arms makes the clamping force uniformly distributed on both sides of the magnetic core 1, avoiding the installation deflection of the magnetic core 1 caused by unilateral force.
[0036] Further, a deformation gap 311 is provided between the two first elastic arms 31. In the embodiment, the deformation gap 311 provides a contraction space for the first elastic arms 31 during clamping, facilitating the elastic deformation of the first elastic arms 31, thereby facilitating the installation of the magnetic core 1 and the clamping of the magnetic core 1 by the first elastic arms 31.
[0037] Furthermore, the end of the first elastic arm 31 is provided with a locking block 312 that engages with the inner wall of the magnetic core 1, and a guide slope 313 extending axially along the outer side of the locking block 312 along the first elastic arm 31. In this embodiment, by providing a locking block 312 at the end of the first elastic arm 31, when the magnetic core 1 is installed in place, the locking block 312 locks onto the top surface of the magnetic core 1, effectively preventing the magnetic core 1 from detaching from the base 3. The main body of the two first elastic arms 31 restricts the horizontal displacement of the magnetic core 1, and the two locking blocks 312 can restrict the vertical displacement of the magnetic core 1, thereby further improving the installation stability of the magnetic core 1. At the same time, the guide slope 313 is provided on the outer side of the locking block 312. During assembly, the slope contacts the inner wall of the magnetic core 1, decomposing the vertical pressure into a horizontal component, guiding the first elastic arm 31 to bend toward the deformation gap 311, thereby facilitating the installation of the magnetic core 1, and providing guidance for the installation and insertion of the magnetic core 1.
[0038] Furthermore, two second elastic arms 32 are provided, and the two second elastic arms 32 are respectively snapped into one set of symmetrical outer sidewalls of the magnetic core 1. In this embodiment, the second elastic arms 32 are arc-shaped and fit against the outer side of the magnetic core 1, increasing the contact area between the two, thereby ensuring uniform force distribution, stable snapping, and reducing vibration and loosening. The second elastic arms 32 are also provided in pairs and symmetrically distributed on the outer side of the magnetic core 1 to ensure the stability of the magnetic core 1 under force.
[0039] Furthermore, the inner diameter of the slot 33 is adapted to the outer diameter of the lead wire 21, and the inner diameter of the opening of the slot 33 is smaller than the outer diameter of the lead wire 21. The inner diameter of the slot 33 adapts to the outer diameter of the lead wire 21, allowing the slot 33 to completely enclose the lead wire 21 and prevent it from loosening. Since the inner diameter of the slot 33 opening is smaller than the outer diameter of the lead wire 21, during assembly, the lead wire 21 is pressed into the slot 33 through elastic deformation, and the elastic protrusion 331 of the opening provides radial clamping force to prevent the wire from loosening.
[0040] Furthermore, the opening of the slot 33 is symmetrically provided with elastic protrusions 331, and the outer surface of the elastic protrusions 331 is set as an arc-shaped surface. The arc-shaped elastic protrusions 331 symmetrically provided in the opening of the slot 33 provide a smooth transition when the lead wire 21 is pressed in, and the arc surface disperses local stress, avoiding scratches on the insulation layer. The root of the protrusion is designed with a thin-walled structure to ensure a certain elastic deformation.
[0041] Furthermore, the base 3 is a one-piece molded structure made of plastic. The plastic material used for the base 3 provides good insulation, corrosion resistance, and a certain degree of elasticity, meeting the various requirements of the common-mode inductor during operation. The one-piece molding process greatly simplifies the production process of the base 3, eliminating the need for subsequent assembly steps and thus improving production efficiency.
[0042] Further, the coil winding 2 is arranged in two groups, and the two groups of coil winding 2 are symmetrically wound on the side wall of the magnetic core 1. The two groups of coil winding 2 are symmetrically wound on the two side walls of the magnetic core 1. Through the symmetric arrangement, the magnetic flux generated by the common-mode current is mutually enhanced, the differential-mode magnetic flux is mutually offset, and the filtering performance is optimized.
[0043] The above is only optional embodiments of the present application, and does not limit the patent range of the present application, and any equivalent structural transformation made by using the content of the present application specification and drawings, or directly / indirectly applied in other related technical fields under the utility model concept of the present application is included in the patent protection range of the present application.
Claims
1. A snap-in molded common mode inductor, characterized by, The utility model relates to a magnetic core, a coil winding is wound on the magnetic core, the coil winding is provided with a lead-out wire, a base is used for fixing the magnetic core and the coil winding, the base is provided with a plurality of first elastic arms and a plurality of second elastic arms, a plurality of the first elastic arms pass through the inside of the magnetic core, and a plurality of the first elastic arms end and the inside wall of the magnetic core are clamped, a plurality of the second elastic arms are attached to the outside of the magnetic core, and a plurality of the second elastic arms and the outside wall of the magnetic core are clamped, and the base is also provided with a clamping groove for clamping the lead-out wire. The first elastic arm is provided with two, and two first elastic arms are clamped in one set of symmetrical inside walls of the magnetic core. The first elastic arm is provided with two, and two first elastic arms are clamped in one set of symmetrical inside walls of the magnetic core. The first elastic arm is provided with two, and two first elastic arms are clamped in one set of symmetrical inside walls of the magnetic core.
2. The snap-in molded common mode inductor of claim 1, wherein, The first elastic arm is provided with two, and two first elastic arms are clamped in one set of symmetrical inside walls of the magnetic core.
3. The snap-in molded common mode inductor of claim 2, wherein, The first elastic arm is provided with two, and two first elastic arms are clamped in one set of symmetrical inside walls of the magnetic core.
4. The snap-in molded common mode inductor of claim 2, wherein, The first elastic arm is provided with two, and two first elastic arms are clamped in one set of symmetrical inside walls of the magnetic core.
5. The snap-in molded common mode inductor of claim 1, wherein, The first elastic arm is provided with two, and two first elastic arms are clamped in one set of symmetrical inside walls of the magnetic core.
6. The snap-in molded common mode inductor of claim 5, wherein, The first elastic arm is provided with two, and two first elastic arms are clamped in one set of symmetrical inside walls of the magnetic core.
7. The snap-in molded common mode inductor of claim 1, wherein, The first elastic arm is provided with two, and two first elastic arms are clamped in one set of symmetrical inside walls of the magnetic core.
8. The snap-in molded common mode inductor of claim 7, wherein, The first elastic arm is provided with two, and two first elastic arms are clamped in one set of symmetrical inside walls of the magnetic core.
9. The snap-in molded common mode inductor of claim 1, wherein, The first elastic arm is provided with two, and two first elastic arms are clamped in one set of symmetrical inside walls of the magnetic core.
10. The snap-in molded common mode inductor of claim 1, wherein, The first elastic arm is provided with two, and two first elastic arms are clamped in one set of symmetrical inside walls of the magnetic core. The first elastic arm is provided with two, and two first elastic arms are clamped in one set of symmetrical inside walls of the magnetic core. The first elastic arm is provided with two, and two first elastic arms are clamped in one set of symmetrical inside walls of the magnetic core. The first elastic arm is provided with two, and two first elastic arms are clamped in one set of symmetrical inside walls of the magnetic core. The first elastic arm is provided with two, and two first elastic arms are clamped in one set of symmetrical inside walls of the magnetic core. The first elastic arm is provided with two, and two first elastic arms are clamped in one set of symmetrical inside walls of the magnetic core. The first elastic arm is provided with two, and two first elastic arms are clamped in one set of symmetrical inside walls of the magnetic core. The first elastic arm is provided with two, and two first elastic arms are clamped in one set of symmetrical inside walls of the magnetic core. The first elastic arm is provided with two, and two first elastic arms are clamped in one set of symmetrical inside walls of the magnetic core. The first elastic arm is provided with two, and two first elastic arms are clamped in one set of symmetrical inside walls of the magnetic core. The first elastic arm is provided with two, and two first elastic arms are clamped in one set of symmetrical inside walls of the magnetic core. The first elastic arm is provided with two, and two first elastic arms are clamped in one set of symmetrical inside walls of the magnetic core. The first elastic arm is provided with two, and two first elastic arms are clamped in one set of symmetrical inside walls of the magnetic core. The first elastic arm is provided with two, and two first elastic arms are clamped in one set of symmetrical inside walls of the magnetic core. The first elastic arm is provided with two, and two first elastic arms are clamped in one set of symmetrical inside walls of the magnetic core.