CN218181977U

CN218181977U - Common mode choke

Info

Publication number: CN218181977U
Application number: CN202221798383.8U
Authority: CN
Inventors: 梅伟; 吴高峰
Original assignee: Hubei Ronghao Electronics Co ltd
Current assignee: Hubei Ronghao Electronics Co ltd
Priority date: 2022-07-13
Filing date: 2022-07-13
Publication date: 2022-12-30
Anticipated expiration: 2032-07-13

Abstract

The utility model discloses a common mode choke, including the choke body, the choke body is including the magnetic core mainboard, two the magnetic core flange is all installed to the both sides of magnetic core mainboard, two the top both sides of magnetic core flange all are provided with the electrode salient point, the winding has common mode coil on the magnetic core mainboard, common mode coil's extreme point and the protruding spot welding of electrode, two packaging bottom plate is installed to the bottom of magnetic core flange, packaging cover is installed at packaging bottom plate's top, packaging cover's interior bottom is provided with four protection casing, protection casing is corresponding with the electrode salient point position, just packaging bottom plate and packaging cover are connected through four buckle subassemblies, through the installation of packaging cover on packaging bottom plate to make four protection casing cover the top at four electrode salient points respectively, thereby the solder joint of protection choke body can not directly expose in the air, prevent the open circuit that the oxidation and produce, increase common mode choke's reliability.

Description

Common mode choke

Technical Field

The utility model relates to an inductor field, concretely relates to common mode choke.

Background

Many electronic devices, including portable electronic devices, are basically powered by an ac adapter. The connection between the AC adapter and the portable electronic device is through a DC wire, which not only radiates noise, but also couples external noise from the wire of the adapter. EMC (electromagnetic compatibility) components are therefore required to filter out the noise on the power supply line. The conventional approach is to add a common mode choke consisting of a ferrite bead and coils wound around the bead, the coils being highly insulated from each other.

However, the solder joints of the conventional common mode choke are exposed in the air and are easily oxidized, so that the connection between the solder joints and the coil is loose, an open circuit is easily generated, and the reliability of the common mode choke is reduced.

Therefore, it is necessary to invent a common mode choke to solve the above problems.

Disclosure of Invention

The utility model aims at providing a common mode choke to solve the above-mentioned weak point in the technique.

In order to achieve the above object, the present invention provides the following technical solutions:

the utility model provides a common mode choke, includes the choke body, the choke body is including the magnetic core mainboard, two the magnetic core flange is all installed, two to the both sides of magnetic core mainboard the top both sides of magnetic core flange all are provided with the electrode salient point, the winding has common mode coil on the magnetic core mainboard, common mode coil's extreme point and electrode salient point welding, two packaging bottom plate is installed to the bottom of magnetic core flange, packaging cover is installed at packaging bottom plate's top, packaging cover's interior bottom is provided with four protective housing, four protective housing is corresponding with four electrode salient point positions respectively, just packaging bottom plate and packaging cover are connected through four buckle subassemblies.

Preferably, the four buckle components comprise insertion blocks and buckle blocks, the insertion blocks are respectively located on the front side and the rear side of the two sides of the bottom of the packaging cover, the insertion blocks and the buckle blocks are of hollow structures and are close to each other, openings are formed in the insertion blocks, the buckle blocks are located inside the insertion blocks, rotating shafts are arranged at the bottoms of the two sides of the buckle blocks, the rotating shafts are rotatably connected with the inner walls of the insertion blocks, two compression springs are arranged inside the insertion blocks and the buckle blocks, and four butt joint slotted holes are formed in the positions, corresponding to the positions, of the packaging bottom plate.

Preferably, the buckling block is located on one side, close to the outer side, of the inserting block, the compression spring is fixedly connected with the inserting block and the inner wall of the buckling block, the outer side face of the buckling block is of a wedge structure inclined towards one end of the packaging bottom plate, and the butt joint slot hole is of an L-shaped structure.

Preferably, when the inserting block and the clamping block are positioned in the butt joint slot hole, the lowest surface of the inserting block is higher than the ground of the packaging bottom plate.

Preferably, the four protection shells are provided with insulating rubber gaskets at the bottoms, and through holes for passing wires are arranged on two sides of the choke body.

Preferably, the four corners of the bottom of the packaging bottom plate are provided with anti-skid rubber pads.

Preferably, the bottom of each of the two magnetic core flanges of the choke body is connected with the packaging bottom plate through two fixing bolts.

In the technical scheme, the utility model provides a technological effect and advantage:

through the installation of encapsulation lid on the encapsulation bottom plate to make four protection casing cover respectively at the top of four electrode salient points, thereby the solder joint of protection choke body can directly not expose in the air, prevent the open circuit that the oxidation produced, increase the reliability of common mode choke, and the equipment through encapsulation lid and encapsulation bottom plate, can wrap up whole choke body, can further reduce the risk that choke body and external world contact produced, increase stability.

Drawings

Fig. 1 is a perspective view of the overall structure of the present invention.

Fig. 2 is a plan view of the overall structure of the present invention.

Fig. 3 is a bottom perspective view of the sealing cover of the present invention.

Fig. 4 is a bottom perspective view of the package base plate of the present invention.

Figure 5 is the utility model discloses a buckle subassembly split map.

Description of reference numerals:

1. a choke body; 2. packaging the bottom plate; 3. a package cover; 4. a buckle assembly; 11. a magnetic core main board; 12. a magnetic core flange; 13. an electrode bump point; 14. a common mode coil; 21. butt-jointing the slotted holes; 22. an anti-slip rubber pad; 31. a protective housing; 32. an insulating rubber gasket; 33. a through hole; 41. inserting a block; 42. a buckling block; 43. a compression spring; 44. a rotating shaft.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the attached drawings.

The utility model provides a as shown in fig. 1-4 a common mode choke, including choke body 1, choke body 1 is including magnetic core mainboard 11, magnetic core flange 12 is all installed to two magnetic core mainboard 11's both sides, the top both sides of two magnetic core flanges 12 all are provided with electrode salient point 13, the winding has common mode coil 14 on the magnetic core mainboard 11, common mode coil 14's extreme point and electrode salient point 13 welding, package base plate 2 is installed to the bottom of two magnetic core flanges 12, package cover 3 is installed at package base plate 2's top, the interior bottom of package cover 3 is provided with four protection casing 31, four protection casing 31 are corresponding with four electrode salient point 13 positions respectively, and package base plate 2 and package cover 3 are connected through four buckle subassembly 4, through the installation of package cover 3 on package base plate 2, thereby make four protection casing 31 cover the top at four electrode salient point 13 respectively, thereby the solder joint of protection choke body 1 can not directly expose in the air, open a way that the oxidation produced, increase common mode choke's reliability, and through package cover 3 and package base plate 2's equipment, can reduce whole choke body 1 and the stability of the contact, the external risk of further increase.

Further, in the above technical solution, each of the four fastening assemblies 4 includes an insert block 41 and a fastening block 42, the four insert blocks 41 are respectively located in front of and behind two sides of the bottom of the encapsulation cover 3, the insert blocks 41 and the fastening blocks 42 are both hollow structures and have openings on their sides close to each other, the fastening blocks 42 are located inside the insert blocks 41, the bottoms of two sides of the fastening blocks 42 are provided with rotating shafts 44, the two rotating shafts 44 are rotatably connected with the inner walls of the insert blocks 41, two compression springs 43 are installed inside the insert blocks 41 and the fastening blocks 42, and four butt-joint slots 21 are formed in corresponding positions on the encapsulation base plate 2;

specifically, the acting force of the compression spring 43 can make one end of the buckling block 42 automatically pop out, when the packaging cover 3 and the packaging bottom plate 2 are assembled, the inserting blocks 41 are respectively aligned with the butt joint slot holes 21 to be inserted, then the buckling block 42 can be popped out from the bottoms of the butt joint slot holes 21 through the compression spring 43, so that the clamping is completed, the convenient connection and installation are realized, when the disassembly is needed, the buckling block 42 can be pushed to retract by pushing the bottom of the packaging bottom plate 2, and then the packaging cover 3 can be pulled out, so that the disassembly is simple and convenient.

Further, in the above technical solution, the locking block 42 is located on one side of the insertion block 41 close to the outer side, and the compression spring 43 is fixedly connected with the insertion block 41 and the inner wall of the locking block 42, the outer side surface of the locking block 42 is a wedge structure inclined towards one end of the package base plate 2, and the butt-joint slot 21 is an L-shaped structure;

specifically, the two ends of the compression spring 43 are fixedly connected, so that the ejection angle of the snap block 42 is limited, and the snap block 42 and the compression spring 43 are prevented from being separated from the inside of the insert block 41, while the wedge structure can facilitate the insert block 41 to be inserted into the butt joint slot 21, and the L-shaped structure of the butt joint slot 21 can be more suitable for the insertion of the insert block 41 and the ejection fixation of the snap block 42.

Further, in the above technical solution, when the inserting block 41 and the fastening block 42 are located inside the butt-joint slot 21, the lowest surface of the inserting block 41 is higher than the ground of the package base plate 2;

in particular, the insert blocks 41 are thereby prevented from protruding compared to the bottom of the package base plate 2, resulting in difficulty in mounting or placing the package base plate 2.

Further, in the above technical solution, the bottom of each of the four protection shells 31 is provided with an insulating rubber gasket 32, and both sides of the choke body 1 are provided with through holes 33 for passing wires;

specifically, the core flange 12 at the joint of the electrode protrusion 13 and the common mode coil 14 is provided with a notch to prevent the common mode coil 14 from being pressed when the protection casing 31 is pressed down to cover the electrode protrusion 13, and the insulating rubber gasket 32 can make the top of the protection casing 31 and the core flange 12 more sealed.

Further, in the above technical solution, the four corners of the bottom of the package base plate 2 are all installed with the anti-slip rubber pads 22;

in particular, the mounting or placement of the package substrate 2 is made more stable by the non-slip rubber pad 22.

Further, in the above technical solution, the bottoms of the two magnetic core flanges 12 of the choke body 1 are connected to the package base plate 2 through two fixing bolts;

specifically, during production or maintenance, the common mode coil 14 needs to be wound on the magnetic core motherboard 11, and the choke body 1 and the package base plate 2 can be more conveniently mounted or maintained by detaching the fixing bolt.

This practical theory of operation:

when the package cover 3 and the package base plate 2 are assembled, the insertion blocks 41 are respectively inserted into the butt joint slot holes 21 in an aligned manner, and then the snap-in blocks 42 are popped out from the bottoms of the butt joint slot holes 21 through the compression springs 43, so that the snap-in is completed, the convenient connection and installation are realized, and the four protection shells 31 are respectively covered on the tops of the four electrode convex points 13, so that the welding points of the choke body 1 are protected from being directly exposed in the air, an open circuit caused by oxidation is prevented, when the disassembly is needed, the snap-in blocks 42 are pushed from the bottom of the package base plate 2 to be retracted, and then the package cover 3 is pulled out.

While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the invention.

Claims

1. A common mode choke, comprising a choke body (1), characterized in that: choke body (1) is including magnetic core mainboard (11), two magnetic core flange (12), two are all installed to the both sides of magnetic core mainboard (11) magnetic core flange (12) the top both sides all are provided with electrode salient point (13), the winding has common mode coil (14) on magnetic core mainboard (11), common mode coil (14)'s extreme point and electrode salient point (13) welding, two packaging bottom plate (2) are installed to the bottom of magnetic core flange (12), packaging cover (3) are installed at packaging bottom plate's (2) top, packaging cover's (3) interior bottom is provided with four protection casing (31), four protection casing (31) are corresponding with four electrode salient point (13) positions respectively, just packaging bottom plate (2) and packaging cover (3) are connected through four buckle components (4).

2. A common-mode choke according to claim 1, characterized in that: four buckle subassembly (4) are all including inserted block (41) and buckle piece (42), four inserted block (41) are located encapsulation lid (3) bottom both sides respectively around, inserted block (41) are hollow structure and are close to each other with buckle piece (42) and set up the opening, buckle piece (42) are located the inside of inserted block (41), just buckle piece (42) both sides bottom is provided with pivot (44), two pivot (44) are connected with inserted block (41) inner wall rotation, inserted block (41) and buckle piece (42) internally mounted have two compression spring (43), it is provided with four butt joint slotted hole (21) to correspond position department on packaging bottom plate (2).

3. A common-mode choke according to claim 2, characterized in that: the clamping block (42) is located on one side, close to the outer side, of the inserting block (41), the compression spring (43) is fixedly connected with the inserting block (41) and the inner wall of the clamping block (42), the outer side face of the clamping block (42) is of a wedge structure inclined towards one end of the packaging bottom plate (2), and the butt joint groove hole (21) is of an L-shaped structure.

4. A common-mode choke according to claim 2, characterized in that: when the inserting block (41) and the buckling block (42) are positioned in the butt joint slotted hole (21), the lowest surface of the inserting block (41) is higher than the ground of the packaging bottom plate (2).

5. A common-mode choke according to claim 1, characterized in that: four insulating rubber gaskets (32) are installed at the bottom of the protective shell (31), and through holes (33) for passing wires are arranged on two sides of the choke body (1).

6. A common-mode choke according to claim 1, characterized in that: four corners of the bottom of the packaging bottom plate (2) are provided with anti-skid rubber pads (22).

7. A common-mode choke according to claim 1, characterized in that: the bottom parts of two magnetic core flanges (12) of the choke body (1) are connected with the packaging bottom plate (2) through two fixing bolts.