Cobalt-based amorphous magnetic bead

Abstract

The utility model discloses a cobalt-based amorphous magnetic bead which comprises a magnetic bead body, the magnetic bead body comprises an annular cobalt-based amorphous magnetic core and an insulating shell, the insulating shell comprises an inner sleeve and an outer sleeve, the inner sleeve is arranged in the outer sleeve, the inner sleeve is connected with the outer sleeve in a buckled mode, an annular containing groove is formed between the inner sleeve and the outer sleeve, and the annular containing groove is communicated with the cobalt-based amorphous magnetic core. The cobalt-based amorphous magnetic core is located in the annular containing groove. The cobalt-based amorphous magnetic core is selected to manufacture the magnetic bead, the magnetic bead is installed in a circuit at a power supply input end in a mode of penetrating through the magnetic bead or being sleeved on a semiconductor pin, noise is actively eliminated from the source, and the circuit is particularly suitable for various high-frequency switching power supplies under the frequency of 9K-3MHz, precise instruments and meters and various circuits with very strict noise requirements. The structure of the insulating shell is simplified, and the original injection molding or coating integrated forming is changed into the modular design formed by the inner sleeve and the outer sleeve, so that the magnetic core in the sleeve is not influenced by any internal stress, and the filtering capability of the magnetic core is fully released.

Description

TECHNICAL FIELD

[0001] The utility model relates to electronic component technical field, concretely relates to a cobalt-based amorphous magnetic bead. BACKGROUND

[0002] The function of the magnetic bead is mainly to eliminate the high-frequency electromagnetic noise and spike interference existing in the circuit. At present, the magnetic bead on the market is mainly a nickel-zinc ferrite magnetic bead, which is mainly used for absorbing or minimizing the noise generated in the circuit, and belongs to a passive absorption device. The noise reduction effectiveness is directly affected by the circuit frequency. The material permeability requirement for the magnetic bead selection is harsh, and the frequency compatibility has the disadvantage of losing both sides. The ferrite magnetic bead has almost no effect on noise in the low-frequency band of 9K-3MHz. The ferrite has a decibel value of <20dB in the high-frequency band of 375MHz. Therefore, the effect is poor when the ferrite magnetic bead is used in circuits such as high-precision instruments, meters and various circuits with very strict requirements on high-frequency electromagnetic noise and spike interference.

[0003] The cobalt-based amorphous magnetic bead is a unique new anti-interference magnetic element. When it is connected to the power input end, it can play a role in spike suppression and noise elimination before noise is formed, and noise is eliminated from the source of the circuit, which belongs to an active noise suppressor. Its decibel value is >47dB in the high-frequency band of 375MHz. Therefore, the effect is best when it is used in circuits such as high-precision instruments, meters and various circuits with very strict requirements on high-frequency electromagnetic noise and spike interference. The structure of the cobalt-based amorphous magnetic bead on the market usually includes a cobalt-based amorphous magnetic core and an insulating shell. The insulating shell is usually coated on the surface of the cobalt-based amorphous magnetic core by injection molding or spraying epoxy resin. After injection molding or coating, the surface of the magnetic bead will be affected by the internal stress of the injection molding layer and the coating layer, and the electrical performance will decrease. The decrease is between 10-30%, which seriously affects the filtering effect of the product. UTILITY MODEL CONTENTS

[0004] In view of the defects of the prior art, the utility model provides a cobalt-based amorphous magnetic bead. The structure of the insulating shell is simplified from original injection molding or coating to modular design composed of an inner sleeve and an outer sleeve, so that the magnetic core is not affected by any internal stress in the sleeve, and the filtering capacity of the magnetic core is fully released.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A cobalt-based amorphous magnetic bead, comprising a magnetic bead body, the magnetic bead body comprising a ring-shaped cobalt-based amorphous magnetic core and an insulating shell, the insulating shell comprising an inner sleeve and an outer sleeve, the inner sleeve being arranged in the outer sleeve, the inner sleeve and the outer sleeve being snap-connected, an annular accommodation groove being formed between the inner sleeve and the outer sleeve, and the cobalt-based amorphous magnetic core being located in the annular accommodation groove.

[0007] Preferably, the inner sleeve is provided with a first baffle at one end, the outer sleeve is provided with a second baffle at an end away from the first baffle, the first baffle is provided with a second through hole in communication with the inside of the inner sleeve, and the second baffle is provided with a third through hole in communication with the inside of the outer sleeve.

[0008] Preferably, the inside of the second baffle is provided with a positioning ring protruding therefrom, and the positioning ring is arranged around the second through hole.

[0009] Preferably, the outside of the inner sleeve at an end away from the first baffle and the side of the positioning ring facing the second through hole are both provided with a tapered slope.

[0010] Preferably, the cobalt-based amorphous core is formed with an axial first through hole, and the first through hole, the second through hole and the third through hole are coaxially arranged.

[0011] Preferably, the inside of the outer sleeve is provided with a clamping block protruding therefrom, and the first baffle is provided with a clamping groove corresponding to the clamping block recessed in the circumferential side of the first baffle.

[0012] Preferably, the clamping groove is annular and is distributed along the circumference of the first baffle.

[0013] Preferably, the cobalt-based amorphous core is a laminated structure formed by winding a cobalt-based amorphous strip.

[0014] Preferably, the cobalt-based amorphous core is glued to the inner sleeve at the joint with the positioning ring by using glue.

[0015] Preferably, the thickness of each layer of the cobalt-based amorphous core is 0.015-0.025mm.

[0016] Compared with the prior art, the utility model has obvious advantages and beneficial effects, specifically, the magnetic bead is made of a cobalt-based amorphous core, is installed in the circuit in the form of a through magnetic bead or in the form of being sleeved on the semiconductor pin at the power input end, noise is suppressed before being formed, and the noise is actively eliminated from the source, and the utility model is particularly suitable for various high-frequency switching power supplies, precision instruments and meters and various circuits with very strict noise requirements under 9K-3MHz frequency, such as RF circuits, PLL, oscillation circuits, super-high-frequency memory circuits and the like, and the magnetic bead needs to be added to the power input part to suppress and convert electromagnetic interference. The structure of the insulating shell is simplified, the original injection molding or coating integrated molding is changed into the modular design composed of the inner sleeve and the outer sleeve, the magnetic core is not affected by any internal stress in the sleeve, and the filtering capacity of the magnetic core is fully released.

[0017] In order to more clearly set forth the structural features, technical means and specific purposes and functions reached by the utility model, the utility model will be further described in detail below by combining with the drawings and specific embodiments: BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is the exploded schematic view of the overall structure of the embodiment of the utility model;

[0019] Figure 2 is the schematic view of the cross section structure of the embodiment of the utility model;

[0020] Figure 3 is the schematic view of the internal structure of the outer sleeve of the embodiment of the utility model;

[0021] Figure 4 is the schematic view of the use state of the embodiment of the utility model.

[0022] The figure mark explanation is as follows:

[0023] 10, cobalt-based amorphous core; 11, first through hole; 20, outer sleeve; 21, clamping block; 22, second baffle; 23, third through hole; 24, positioning ring; 241, tapered inclined surface; 30, inner sleeve; 31, first baffle; 32, clamping groove; 33, second through hole; 34, annular accommodating groove; 35, glue; 40, lead wire. Specific implementation

[0024] In the description of the utility model, it needs to be explained that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is the orientation or position relationship based on the shown in the drawing, and is only for the convenience of describing the utility model and simplifying the description, and is not to indicate or imply that the indicated position or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore can not be understood as a limitation on the utility model.

[0025] In the description of the utility model, it needs to be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or integrally connected;Can be mechanically connected, or electrically connected;Can be directly connected, or indirectly connected through an intermediate medium, can be the communication inside two elements.For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0026] Please refer to Figures 1-4As shown, the utility model relates to a kind of cobalt-based amorphous magnetic beads, including magnetic bead body, the magnetic bead body includes annular cobalt-based amorphous magnetic core 10 and insulating shell, the insulating shell includes inner sleeve 30 and outer sleeve 20, the inner sleeve 30 is located in outer sleeve 20, the inner sleeve 30 is buckled with outer sleeve 20, annular accommodating groove 34 is formed between the inner sleeve 30 and outer sleeve 20, the cobalt-based amorphous magnetic core 10 is located in annular accommodating groove 34.By selecting cobalt-based amorphous magnetic core to make magnetic bead, in the form of through magnetic bead or in the form of being installed in circuit in semiconductor pin form at power input end, make circuit before noise formation to suppress its generation, eliminate noise from source, especially suitable for 9K~3MHz frequency under various high-frequency switching power supply, precision instruments and various very strict circuit to noise requirement, such as RF circuit, PLL, oscillation circuit, contain ultrahigh frequency memory circuit etc., all need to add magnetic bead in power input part to suppress and convert electromagnetic interference.By simplifying the structure of insulating shell, from original injection molding or coating integrated molding, change into modular design of the module consisting of inner sleeve and outer sleeve, so that the magnetic core is not affected by any internal stress in sleeve, fully release the filtering capacity of magnetic core.

[0027] Specifically, the outer diameter of the magnetic bead body is 2.5-4.5 mm, and the outer diameter of the magnetic bead body is preferably 3.0-3.8 mm.

[0028] Specifically, the inner sleeve 30 is provided with a first baffle 31 at one end, the outer sleeve 20 is provided with a second baffle 22 at the end away from the first baffle 31, the first baffle 31 is provided with a second through hole 33 communicating with the inside of the inner sleeve 30, the second baffle 22 is provided with a third through hole 23 communicating with the inside of the outer sleeve 20, the cobalt-based amorphous magnetic core is formed with an axial first through hole, and the first through hole 11, the second through hole 33 and the third through hole 23 are coaxially arranged.

[0029] Specifically, the second baffle 22 is provided with a positioning ring 24 on the inner side, and the positioning ring 24 is arranged around the second through hole.

[0030] Specifically, the outer side of the inner sleeve 30 away from the first baffle 31 and the side of the positioning ring 24 facing the second through hole 33 are both provided with a tapered inclined surface 241.

[0031] Specifically, the outer surface of the inner sleeve 30 away from the first baffle 31 is adapted to the inner surface of the positioning ring 24 in terms of inclination angle.

[0032] Specifically, the outer sleeve 20 is provided with a clamping block 21 on the inner side, and the first baffle 31 is recessed with a clamping groove 32 corresponding to the clamping block 21 on the circumferential side.

[0033] Specifically, the clamping groove 32 is annular and distributed along the circumference of the first baffle 31.

[0034] Assembled, the cobalt-based amorphous core 10 is placed in the outer sleeve 20, the inner sleeve 30 is threaded in the first through hole 11, the clamping groove 32 is clamped and fixed with the clamping block 21, and the outer surface of the inner sleeve 30 away from the first baffle 31 end abuts against the inner surface of the positioning ring 24.

[0035] Specifically, the cobalt-based amorphous core 10 is a laminated structure, and the thickness of each layer of the cobalt-based amorphous core 10 is 0.015-0.025 mm.

[0036] Specifically, the cobalt-based amorphous core 10 is glued to the inner sleeve 30 at the intersection of the positioning ring 24 by glue 35.

[0037] As shown in the figure, the utility model discloses in actual use still includes the lead 40, the lead 40 is threaded in the first through hole 11 of magnetic pearl body, and the lead 40 is connected with magnetic pearl body by glue and is glued, thereby forming the magnetic bead. It should be understood that in actual use, the magnetic pearl body can also be directly used on the semiconductor pin, and the lead 40 is not required to be additionally prepared. Figure 4

[0038] In summary, the utility model discloses by selecting cobalt-based amorphous core to make magnetic pearl, installs in the circuit in the form of magnetic bead of power input end or the form of being sleeved on semiconductor pin, makes the circuit before the noise formation and restrains its generation, eliminates the noise from the source, and it is especially suitable for each kind of high-frequency switching power supply under 9K-3MHz frequency, precision instruments and meters and various very strict circuit to noise requirement, such as RF circuit, PLL, oscillation circuit, contains ultrahigh frequency memory circuit etc., all need to add magnetic pearl in power input part to restrain and convert electromagnetic interference. Through the structure simplification of insulating shell, from the original injection molding or coating integrated molding, change into the modular design of the module composed of inner sleeve and outer sleeve, make the core in the sleeve not be affected by any internal stress, and the filtering capacity of the core is fully released.

[0039] The above is only the preferred embodiment of the utility model, and does not limit the utility model, so any modification, equivalent replacement, improvement, etc. according to the technical actuality of the utility model to the above embodiment still belongs to the range of the utility model technical scheme.​

Claims

1. A cobalt-based amorphous magnetic bead comprising a magnetic bead body, characterized in that, The magnetic bead body comprises a ring-shaped cobalt-based amorphous magnetic core and an insulating shell, the insulating shell comprises an inner sleeve and an outer sleeve, the inner sleeve is arranged in the outer sleeve, the inner sleeve and the outer sleeve are buckled, an annular accommodating groove is formed between the inner sleeve and the outer sleeve, and the cobalt-based amorphous magnetic core is located in the annular accommodating groove.

2. The cobalt-based amorphous magnetic bead of claim 1, wherein, One end of the inner sleeve is provided with a first baffle, the outer sleeve is provided with a second baffle at an end away from the first baffle, the first baffle is provided with a second through hole in communication with the inside of the inner sleeve, and the second baffle is provided with a third through hole in communication with the inside of the outer sleeve.

3. The cobalt-based amorphous magnetic bead of claim 2, wherein, The inside of the second baffle is provided with a positioning ring, and the positioning ring surrounds the second through hole.

4. The cobalt-based amorphous magnetic bead of claim 3, wherein, The outer side of the end of the inner sleeve away from the first baffle and the side of the positioning ring facing the second through hole are both provided with tapered inclined surfaces.

5. The cobalt-based amorphous magnetic bead of claim 2, wherein, The cobalt-based amorphous magnetic core is formed with an axial first through hole, and the first through hole, the second through hole and the third through hole are coaxially arranged.

6. The cobalt-based amorphous magnetic bead of claim 2, wherein, The inner side of the outer sleeve is provided with a clamping block, and the periphery of the first baffle is recessed with a clamping groove corresponding to the clamping block.

7. The cobalt-based amorphous magnetic bead of claim 6, wherein, The clamping groove is annular and is distributed along the circumference of the first baffle.

8. The cobalt-based amorphous magnetic bead of claim 1, wherein, The cobalt-based amorphous magnetic core has a laminated structure formed by winding cobalt-based amorphous strip material.

9. The cobalt-based amorphous magnetic bead of claim 4, wherein, The cobalt-based amorphous magnetic core is glued to the intersection of the positioning ring and the inner sleeve.

10. The cobalt-based amorphous magnetic bead of claim 8, wherein, The thickness of each layer of the cobalt-based amorphous magnetic core is 0.015-0.025 mm.

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