Anti-interference magnetic ring

Abstract

The invention relates to an anti-interference magnetic ring which comprises two shells hinged to each other and semicircular magnetic cores arranged in the shells, and a plurality of elastic components making contact with the outer arc faces of the semicircular magnetic cores respectively are further arranged in the shells. At least a part of the elastic components are distributed in a symmetrical or staggered manner about the first axis, and the rest of the elastic components are distributed in a symmetrical or staggered manner about the second axis; when the two shells are connected in a buckled mode, the semicircular magnetic cores force the elastic component to deform outwards so that a gap between the buckled faces of the two semicircular magnetic cores can be eliminated, and a closed-loop circular magnetic core is formed. The magnetic core fixing device has the advantages that accurate supporting and stable fixing of the semicircular magnetic core are achieved through elastic deformation of the elastic component, the problems that a traditional mode is unstable in fixing and short in service life are solved, and meanwhile the elastic component can be suitable for fixing magnetic cores of different sizes.

Description

Technical Field

[0001] The present invention belongs to the field of equipment anti-interference, and particularly relates to an anti-interference magnetic ring. Background Art

[0002] In electronic devices, magnetic field interference between various circuits and components may cause performance problems or failures. For example, when a transformer on a power line generates a magnetic field, it may affect the normal operation of nearby electronic components. Anti-interference magnetic rings can be installed on power lines or other cables affected by magnetic field interference to reduce the impact of interference by absorbing or transferring magnetic fields.

[0003] Anti-interference magnetic rings are usually used on signal transmission lines that need to be protected, such as power lines, data lines, and sensor lines of electronic devices. They play an important role in electromagnetic compatibility (EMC) design, helping to reduce magnetic field interference and improve the reliability and performance stability of devices.

[0004] In the prior art, the fixing structure between the housing and the magnetic core of the anti-interference magnetic ring is prone to fatigue deformation due to long-term use, resulting in a decrease in fixing performance, so that the internal magnetic core cannot completely cover the protected part, thereby affecting the anti-interference ability of the magnetic ring. Summary of the Invention

[0005] The object of the present invention is to provide an anti-interference magnetic ring that can solve the above technical problems in view of the above problems.

[0006] To achieve the above object, the present invention adopts the following technical solutions: An anti-interference magnetic ring includes two housings that are hingedly connected to each other, and a semi-circular magnetic core disposed inside the housings. A plurality of elastic members that respectively contact the outer arc surface of the semi-circular magnetic core are further provided in the housings. At least a part of the plurality of elastic members are symmetrically or staggeredly distributed about a first axis, and the remaining elastic members are symmetrically or staggeredly distributed about a second axis; and there is a clearance distance between each elastic member and the inner side wall of the corresponding housing when the elastic member is at its maximum deformation, and the maximum deformation amount of the elastic member is less than the clearance distance. When the two housings are snap-connected, the semi-circular magnetic core forces the elastic members to deform outward so that the gap between the snap surfaces of the two semi-circular magnetic cores is eliminated, forming a closed-loop circular magnetic core.

[0007] Further, the elastic members that are symmetrically or staggeredly distributed about the first axis make the axis line of the semi-circular magnetic core coincide with the first axis, and the elastic members that are symmetrically or staggeredly distributed about the second axis make the two ends of the semi-circular magnetic core maintain the same distance dimension from the inner wall of the housing.

[0008] Further, a pressure relief hole is provided on the housing at the connection between the elastic member and the housing.

[0009] Further, the elastic members symmetrically or staggeredly distributed about the first axis are respectively provided with tangent inclined surfaces tangent to the outer arc surface of the semi-circular magnetic core.

[0010] Further, a cantilever portion is provided on the elastic member, and the tangent inclined surface is provided on the cantilever portion.

[0011] Further, the elastic members symmetrically or staggeredly distributed about the first axis are connected to the inner bottom surface of the housing, and a reinforcing portion is provided between the elastic member and the inner wall of the housing, and the height of the reinforcing portion is lower than the height of the elastic member.

[0012] Further, the elastic members symmetrically or staggeredly distributed about the second axis are arc-shaped cantilevers, and the arc-shaped cantilevers are connected to the inner wall of the housing.

[0013] Further, a limiting portion is provided in the central region of the inner bottom surface of the housing.

[0014] Further, the two housings are matched through a positioning structure, and the two housings are locked through a snap structure. The positioning structure includes a positioning protrusion and a positioning step, and any one of the positioning protrusion and the positioning step is provided on one of the housings, and the other is provided on the other housing; the snap structure includes a snap portion and a snap, and any one of the snap portion and the snap is provided on one of the housings, and the other is provided on the other housing.

[0015] Further, a first end limiting arm is provided at the first end of one of the housings along the first axis, and a second end limiting arm is provided at the second end of the other housing along the first axis.

[0016] Compared with the prior art, the advantages of the present application are as follows: precise support and stable fixation of the semi-circular magnetic core are achieved through the elastic deformation of the elastic member, avoiding unstable fixation in the traditional manner, so that the gap between the semi-circular magnetic core and the butting surface is eliminated and they are fitted together to improve the anti-interference performance.

[0017] The elastic members distributed on both sides of the first axis and the second axis can correct the position center of the semi-circular magnetic core in the corresponding housing under the action of the elastic member to ensure that the edges of the butting surfaces of the two semi-circular magnetic cores are flush.

[0018] Elastic components distributed on both sides of the first axis and the second axis can enable the semi-circular magnetic cores in the corresponding shells to rotate around the axis line of the semi-circular magnetic cores during the snap connection of the two shells, so that the docking planes of the two semi-circular magnetic cores are completely in contact, thereby improving the anti-interference performance. Description of the Drawings

[0019] Figure 1 It is an exploded assembly view of the anti-interference magnetic ring main structure of the present invention; Figure 2 is Figure 1 An enlarged detailed view of the main components in area A in Figure 3 It is a top view of the shell of the present invention and the main components on the shell Figure 1 ; Figure 4 It is a top view of the shell of the present invention and the main components on the shell Figure 2 ; Figure 5 is Figure 3 A schematic assembly view of the main components in the B-B cross-section in Figure 6 It is a schematic view of the structure of the third embodiment of the present invention.

[0020] In the figure, there are shell 1, decompression hole 10, limiting part 11, alignment protrusion 12, alignment step 13, snap part 14, snap 15, first end limiting arm 16, second end limiting arm 17, semi-circular magnetic core 2, elastic component 3, tangent inclined plane 30, cantilever part 31, strengthening part 32, arc elastic holding arm 40, extrusion part 41, first axis X, second axis Y, and third axis Z. Detailed Embodiment

[0021] The present invention will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. In addition, it should be noted that for the convenience of description, only the parts related to the present invention are shown in the drawings, rather than all the structures.

[0022] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral body; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0023] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include the direct contact of the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the horizontal height of the first feature is less than that of the second feature.

[0024] In the description of this embodiment, the orientation or positional relationships such as "up", "down", "right", "left", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0025] Embodiment 1, as Figure 1 shown, an anti-interference magnetic ring described in this embodiment includes two shells 1 that are hinged to each other. The shell 1 has an internal accommodation space, and a semi-circular magnetic core 2 is disposed in the internal accommodation space of each shell 1. The two semi-circular magnetic cores 2 can be relatively fitted together to form a complete barrel-shaped magnetic core, ensuring the all-round anti-interference effect of the magnetic ring.

[0026] Specifically, a number of elastic members 3 that respectively contact the outer arc surface of the semi-circular magnetic core 2 are further provided in the shell 1. At least part of the number of the elastic members 3 among the number of elastic members 3 is symmetrically or staggeredly distributed with respect to the first axis X, and the remaining elastic members 3 are symmetrically or staggeredly distributed with respect to the second axis Y. And there is a clearance distance between each elastic member 3 and the inner side wall of the corresponding shell 1 when the elastic member 3 is at the maximum deformation, and the maximum deformation amount of the elastic member 3 is less than the clearance distance. The clearance distance is used for the outward deformation avoidance of the elastic member 3 and enables the elastic member 3 to have better elastic performance.

[0027] As Figure 3 shown, at least part of the elastic members 3 are symmetrically distributed, and as Figure 4 shown, at least part of the elastic members 3 are staggeredly distributed. In addition, the design and material of the elastic member 3 can also be flexibly adjusted according to actual needs to adjust its stiffness and contact force, ensuring that the anti-interference performance of the magnetic ring can maintain an excellent state under various conditions; when the two shells 1 are buckled and connected, the semi-circular magnetic core 2 forces the elastic member 3 to deform outward so that the gap between the buckling surfaces of the two semi-circular magnetic cores 2 is eliminated, forming a closed-loop circular magnetic core.

[0028] As shown Figure 3 - Figure 4 in FIG. 1, the elastic members 3 symmetrically or staggeredly distributed with respect to the first axis X align the axis line of the semi-circular core 2 with the first axis X, ensuring the precise positioning and stability of the semi-circular core 2. At the same time, the contact force between the elastic member 3 and the semi-circular core 2 can be adjusted and changed by the structure or material of the elastic member 3, thereby optimizing the fixing performance of the elastic member 3 on the semi-circular core 2, ensuring that the two semi-circular cores 2 can always be stably fitted together under different working conditions, and achieving an efficient anti-interference effect.

[0029] As shown Figure 3 - Figure 4 in FIG. 2, the elastic members 3 symmetrically or staggeredly distributed with respect to the second axis Y keep the two ends of the semi-circular core 2 at the same distance from the inner wall of the housing 1. Through the combined action of the elastic members 3 distributed on the first axis X and the second axis Y, the semi-circular core 2 can be kept away from contacting the housing 1, thus avoiding interference to the internal semi-circular core 2 caused by mechanical impact. Due to the existence of the elastic members 3, when the housing 1 is directly impacted externally, the elastic members 3 can play a buffering effect to a certain extent, ensuring the stability and integrity of the semi-circular core 2.

[0030] The elastic members 3 symmetrically or staggeredly distributed with respect to the second axis Y are arc-shaped cantilevers, and the arc-shaped cantilevers are connected to the inner wall of the housing 1, and the other end of the arc-shaped cantilever abuts against the other end of the semi-circular core 2. As shown Figure 1 in FIG. 3, the arc-shaped cantilever bends along the direction in which the semi-circular core 2 is inserted into the housing 1, and this design can effectively reduce the frictional force generated during the insertion process.

[0031] At the same time, tangent inclined surfaces 30 tangent to the outer arc surface of the semi-circular core 2 are respectively provided on the elastic members 3 symmetrically or staggeredly distributed with respect to the first axis X, and a cantilever portion 31 is provided on the elastic member 3, and the tangent inclined surface 30 is provided on the cantilever portion 31, and the tangent inclined surface 30 is in precise fit with the outer arc surface of the semi-circular core 2, and can further optimize the contact characteristics between the elastic member 3 and the core through the guiding action of the inclined surface. When the elastic member 3 deforms to support the semi-circular core 2, the tangent inclined surface 30 can effectively share the contact stress, avoid local overload, ensure the uniform distribution of the contact force between the elastic member 3 and the semi-circular core 2, and the length and thickness of the cantilever portion 31 can be optimized for its stiffness characteristics through calculation. In addition, the cantilever portion 31 can also adjust the composite stiffness of the elastic member 3 through its shape design to further optimize its contact characteristics with the semi-circular core 2.

[0032] In addition, elastic components 3 that are symmetrically or offset-distributed with respect to the first axis X are connected to the inner bottom surface of the housing 1, and a reinforcing portion 32 is provided between the elastic components 3 and the inner wall of the housing 1. The purpose is to enhance the connection strength between the elastic components 3 and the housing 1, while ensuring that the elastic components 3 can maintain a large degree of freedom during the deformation process. The height of the reinforcing portion 32 is lower than the height of the elastic components 3, which can provide additional support and strengthening effects without interfering with the normal deformation of the elastic components 3, and avoid structural instability and damage caused by external interference or overload.

[0033] As Figure 1 shown, a limiting portion 11 is provided in the central region of the inner bottom surface of the housing 1. The limiting portion 11 cooperates with the above-mentioned elastic components 3 that are symmetrically or offset-distributed with respect to the first axis X to abut against the semi-circular magnetic core 2 so that the bottom of the semi-circular magnetic core 2 does not contact the housing 1. At the same time, it cooperates with the elastic components 3 to prevent the semi-circular magnetic core 2 from moving upward in the third axis Z direction. As an alternative, in this embodiment, the limiting portion 11 can be a limiting column or a limiting block as Figure 1 - Figure 2 shown, and it can also be designed as a limiting elastic piece. For example, the limiting portion 11 has a circular cylindrical structure, and the limiting portion 11 enables the interior of the housing 1 to communicate with the outside to improve the heat dissipation performance. And the outer arc top of the limiting portion 11 and the semi-circular magnetic core 2 are in a tangential state, so that the position adjustment of the semi-circular magnetic core 2 is more flexible.

[0034] Furthermore, while the above-mentioned elastic components 3 provide a supporting force for the semi-circular magnetic core 2, the elastic components 3 themselves need to undergo large deformations. Therefore, a pressure relief hole 10 is provided on the housing 1 at the connection between the elastic components 3 and the housing 1. The purpose is to relieve the local stress concentration change generated when the elastic components 3 deform. When the elastic components 3 undergo large deformations to support the semi-circular magnetic core 2, without the pressure relief hole 10, there is a large stress concentration at the connection between the housing 1 and the elastic components 3. Long-term use will cause damage and fracture at the connection between the housing 1 and the elastic components 3, greatly affecting the service life of the anti-interference magnetic ring. The design of the pressure relief hole 10 fully considers the deformation space required by the elastic components 3 when supporting the semi-circular magnetic core 2 and the change in internal pressure. When the elastic components 3 deform to adapt to different working states, the pressure relief hole 10 can effectively relieve the local pressure concentration caused by the deformation, thereby avoiding problems such as structural overload or excessive local stress.

[0035] Embodiment 2: The structure and principle of this embodiment are basically the same as those of Embodiment 1. The different structure lies in that, for the anti-interference magnetic ring in Embodiment 1 above, this embodiment describes the fixed part of the housing of the anti-interference magnetic ring.

[0036] As Figure 1As shown, in this embodiment, the two housings 1 are cooperated through the alignment structure, and the two housings 1 are locked through the snap structure. The alignment structure includes an alignment protrusion 12 and an alignment step 13. Either the alignment protrusion 12 or the alignment step 13 is provided on one of the housings 1, and the other is provided on the other housing 1. When the two housings 1 are closed, the alignment protrusion 12 will fit with the alignment step 13 in a concave-convex manner to prevent the housing 1 from shifting within the fixed plane, ensuring that the two housings can be quickly and accurately aligned during the assembly process, avoiding offset or improper connection. The snap structure includes a snap portion 14 and a snap 15. Either the snap portion 14 or the snap 15 is provided on one of the housings 1, and the other is provided on the other housing 1. The snap structure has the characteristics of convenient installation, repeatable disassembly and assembly, and can achieve reliable connection without damaging the housing. When fixed, at least part of the snap 15 will be stuck in the receiving groove of the snap portion 14. And to further improve the fixing effect, a plurality of snap portions 14 and snaps 15 are provided on the above-mentioned housing 1.

[0037] And a first end limiting arm 16 is provided at the first end of one of the housings 1 along the first axis X, and a second end limiting arm 17 is provided at the second end of the other housing 1 along the first axis X. The first end limiting arm 16 and the second end limiting arm 17 are as Figure 1 shown and have an extension arm extending out of the housing 1, the purpose of which is to assist in the stable fixation between the two housings 1 and ensure that the two housings 1 will not shift relative to each other in the direction of the first axis X.

[0038] Embodiment 3, based on the above Embodiment 1 and Embodiment 2, this embodiment further discloses the following technical solution: As Figure 6 shown, an end spacing is reserved between the inner side wall of each housing 1 and the two axial end faces of the semi-circular magnetic core 2, and the two elastic members 3 distributed along the first axis X are located in the corresponding end spacings. And the elastic member 3 contacts the semi-circular magnetic core 2 and causes the elastic member 3 to deform. At one end of the two housings 1, there is a first radial holding structure that holds one side of the outer circumference of the cable and is located in one of the end spacings. At the other end of the two housings 1, there is a second radial holding structure that holds the other side of the outer circumference of the cable and is located in the other end spacing. And the specific structure of the first radial holding structure is the same as the specific structure of the second radial holding structure, including an arc-shaped elastic holding arm 40 provided on one of the housings 1, and an extrusion portion 41 provided on the other housing 1 that contacts the outer side of the arc-shaped elastic holding arm 40 when the two housings 1 are buckled. By the extrusion portion 41 extruding the arc-shaped elastic holding arm 40, the arc-shaped elastic holding arm 40 is caused to hold at least part of the circumferential surface of the cable in the circumferential direction, and the two arc-shaped elastic holding arms 40 can prevent the anti-interference magnetic ring of the present application from displacing axially on the cable.

[0039] In the original state, there is a gap with a larger upper part and a smaller lower part between the inner wall of the arc-shaped elastic clamping arm 40 and the cable. With the fastening of the two housings 1, that is, after the housing 1 provided with the extrusion part 41 is buckled on the housing 1 provided with the arc-shaped elastic clamping arm 40, at this time, the extrusion part 41 contacts the outer side surface of the free end of the arc-shaped elastic clamping arm 40 and extrudes the arc-shaped elastic clamping arm 40, so as to eliminate the gap between the arc-shaped elastic clamping arm 40 and the cable.

[0040] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar ways for substitution, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. An anti-interference magnetic ring, comprising two shells (1) hinged to each other, and a semi-circular magnetic core (2) placed inside the shell (1), characterized in that, Inside the housing (1), there are also several elastic members (3) respectively contacting the outer arc surface of the semi-circular magnetic core (2). At least a part of the several elastic members (3) are symmetrically or staggeredly distributed with respect to the first axis (X), and the remaining elastic members (3) are symmetrically or staggeredly distributed with respect to the second axis (Y); and there is a clearance between each elastic member (3) and the inner side wall of the corresponding housing (1) at the maximum deformation. When the two housings (1) are snap-connected, the semi-circular magnetic core (2) forces the elastic members (3) to deform outward so that the gap between the mating surfaces of the two semi-circular magnetic cores (2) is eliminated, forming a closed-loop circular magnetic core.

2. The anti-interference magnetic ring according to claim 1, characterized in that, The elastic members (3) that are symmetrically or staggeredly distributed with respect to the first axis (X) make the axis line of the semi-circular magnetic core (2) coincide with the first axis (X), and the elastic members (3) that are symmetrically or staggeredly distributed with respect to the second axis (Y) make the two ends of the semi-circular magnetic core (2) maintain the same spacing dimension from the inner wall of the housing (1).

3. The anti-interference magnetic ring according to claim 1, wherein On the housing (1), there is a pressure relief hole (10) located at the connection between the elastic member (3) and the housing (1).

4. A magnetic anti-interference ring according to claim 1, characterized in that, On the elastic members (3) that are symmetrically or staggeredly distributed with respect to the first axis (X), there are respectively tangent inclined surfaces (30) tangent to the outer arc surface of the semi-circular magnetic core (2).

5. The anti-interference magnetic ring according to claim 4, characterized in that, On the elastic member (3), there is a cantilever portion (31), and the tangent inclined surface (30) is provided on the cantilever portion (31).

6. A anti-interference magnetic ring according to any one of claims 1-5, characterized in that, The elastic members (3) that are symmetrically or staggeredly distributed with respect to the first axis (X) are connected to the inner bottom surface of the housing (1), and there is a reinforcing portion (32) between the elastic member (3) and the inner wall of the housing (1). The height of the reinforcing portion (32) is lower than the height of the elastic member (3).

7. The anti-interference magnetic ring according to claim 1, wherein The elastic members (3) that are symmetrically or staggeredly distributed with respect to the second axis (Y) are arc-shaped cantilevers, and the arc-shaped cantilevers are connected to the inner wall of the housing (1).

8. An anti-interference magnetic ring according to claim 1, characterized in that, At the center region of the inner bottom surface of the housing (1), there is a limiting portion (11).

9. The anti-interference magnetic ring according to claim 1, characterized in that, The two housings (1) are matched through a positioning structure, and the two housings (1) are locked through a snap structure. The positioning structure includes a positioning protrusion (12) and a positioning step (13). Either the positioning protrusion (12) or the positioning step (13) is provided on one of the housings (1), and the other is provided on the other housing (1); the snap structure includes a snap portion (14) and a snap (15). Either the snap portion (14) or the snap (15) is provided on one of the housings (1), and the other is provided on the other housing (1).

10. A magnetic anti-interference ring according to claim 1, characterized in that, At the first end of one of the housings (1) along the first axis (X), there is a first end limiting arm (16), and at the second end of the other housing (1) along the first axis (X), there is a second end limiting arm (17).

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