Common-mode filter inductor

Abstract

The utility model relates to a common mode filter inductor which comprises a magnetic core, a coil is sleeved outside the magnetic core, a fixing frame is installed outside the coil, a through groove is formed inside the magnetic core, an expansion assembly is installed inside the through groove, and the expansion assembly is used for clamping and fixing the magnetic core inside the fixing frame. The expansion assembly comprises a connecting rod, a movable sleeve, a cross plate, a sliding groove, an expansion plate and a spring, the connecting rod is installed in the fixing frame, the movable sleeve is installed at the top end and the bottom end of the outer portion of the connecting rod, the cross plate is installed outside the connecting rod and located below the movable sleeve, the sliding groove is formed in the cross plate, and the expansion plate is installed in the sliding groove; and the spring sleeves the outer part of the link rod and is positioned on one side far away from the movable sleeve. The beneficial effects of the utility model are that common-mode magnetic cores of different sizes can be installed through the design, and the overall practicability is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of filter inductors, in particular to a common-mode filter inductor. Background Art

[0002] Common-mode inductors, also called common-mode chokes, are often used in computer switching power supplies to filter common-mode electromagnetic interference signals. In board design, common-mode inductors also play the role of EMI filtering, used to suppress the outward radiation of electromagnetic waves generated by high-speed signal lines. Common-mode inductors are essentially a two-way filter. On the one hand, they filter out common-mode electromagnetic interference on signal lines, and on the other hand, they suppress themselves from emitting electromagnetic interference to the outside to avoid affecting the normal operation of other electronic equipment in the same electromagnetic environment.

[0003] In the prior art, the common-mode filter inductor cannot limit and fix the magnetic core during use, resulting in the common-mode filter inductor being easily tilted after installation, affecting the installation of other components. Some common-mode inductors with fixed templates cannot limit and fix magnetic cores of different sizes, and their practicality is low. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a common-mode filter inductor, which can be installed with common-mode magnetic cores of different sizes through design, thereby greatly improving the overall practicality.

[0005] The utility model provides the following technical solution, a common mode filtering inductor, comprising: a magnetic core, a coil is sleeved on the outside of the magnetic core, a fixing frame is installed on the outside of the coil, a through slot is opened inside the magnetic core, an extension component is installed inside the through slot; the extension component is used to clamp and fix the magnetic core inside the fixing frame.

[0006] Preferably, the extension component includes a connecting rod, a movable sleeve, a cross plate, a slide groove, an extension plate and a spring. The connecting rod is installed inside the fixed frame, the movable sleeve is installed at the top and bottom ends of the outside of the connecting rod, the cross plate is installed outside the connecting rod and is located below the movable sleeve, the slide groove is opened inside the cross plate, the extension plate is installed inside the slide groove, and the spring sleeve is arranged outside the connecting rod and is located on the side away from the movable sleeve.

[0007] Preferably, a rotating seat is installed on the outside of the movable sleeve, a connecting seat is installed on the inner side of the expansion plate, and a connecting rod is installed between the expansion plate and the movable sleeve.

[0008] As a preferred embodiment, the top of the expansion board is designed with an inclined structure, and a stopper is installed at the bottom of the expansion board, and the expansion board is connected to the cross board through the stopper.

[0009] Preferably, an extension rod is installed at the bottom of the connecting rod, a fixing plate is installed at the bottom of the extension rod, and a limiting plate is installed at the top of the connecting rod.

[0010] Preferably, the fixed frame is composed of an upper frame and a lower frame, the top of the lower frame is symmetrically mounted with arc columns, and the bottom of the lower frame is provided with a receiving groove at a position corresponding to the arc column.

[0011] Preferably, an insert block is installed on the top of the arc column, the insert block is designed in a triangular structure, a slot is opened inside the accommodating groove at a position corresponding to the insert block, and a heat dissipation net is symmetrically installed on the outside of the upper frame and the lower frame.

[0012] The beneficial effect of the utility model is as follows: by arranging the through groove inside the magnetic core on the outside of the expansion plate, the expansion plate is contracted inwardly, and the expansion plate is limited by the sliding groove inside the cross plate, and at the same time, with the design of the stop block, the expansion plate is made to move linearly along a straight line, so that the connecting rod is contracted synchronously, thereby driving the moving sleeve to move away from each other, so that the moving sleeve squeezes the spring, so that the expansion plate is fixed inside the groove, and at the same time, the moving sleeve is reset by the expansion and contraction energy storage of the spring, so that the expansion plate is expanded outward, thereby completing the fixation of the magnetic core, and by inserting the plug block into the slot, the arc column and the accommodating groove are fitted together, so that the upper frame and the lower frame are connected into one. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the overall internal structure of the utility model;

[0015] Figure 3 This is a schematic diagram of the structure of the expansion component of the utility model;

[0016] In the figure: 1. magnetic core; 2. coil; 3. fixed frame; 301. upper frame; 302. lower frame; 303. arc column; 304. receiving groove; 305. plug-in block; 4. extension component; 401. connecting rod; 402. movable sleeve; 403. cross plate; 404. slide groove; 405. extension plate; 406. spring; 407. connecting rod; 408. extension rod; 409. fixed plate; 410. limit plate; 5. heat dissipation net. DETAILED DESCRIPTION

[0017] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0018] Example

[0019] like Figures 1 to 3 As shown, a common-mode filter inductor includes: a magnetic core 1, a coil 2 is sleeved on the outside of the magnetic core 1, a fixing frame 3 is installed on the outside of the coil 2, a through slot is opened inside the magnetic core 1, and an extension component 4 is installed inside the through slot; the extension component 4 is used to clamp and fix the magnetic core 1 inside the fixing frame 3.

[0020] The extension component 4 includes a connecting rod 401, a movable sleeve 402, a cross plate 403, a slide groove 404, an extension plate 405 and a spring 406. The connecting rod 401 is installed inside the fixed frame 3, the movable sleeve 402 is installed at the top and bottom of the connecting rod 401, the cross plate 403 is installed outside the connecting rod 401 and is located below the movable sleeve 402, the slide groove 404 is opened inside the cross plate 403, the extension plate 405 is installed inside the slide groove 404, the spring 406 is sleeved outside the connecting rod 401 and is located on the side away from the movable sleeve 402, and the magnetic core 1 and coil 2 are used for filtering common-mode electromagnetic interference signals in the switching power supply of a computer. When it is necessary to fix and install magnetic cores 1 of different sizes to prevent tilting and causing misalignment of other components during installation, the through groove inside the magnetic core 1 is sleeved on the outside of the expansion board 405, so that the expansion board 405 is contracted inwardly, thereby fixing the expansion board 405 in the groove. At the same time, the spring 406 is stretched and stored to reset the movable sleeve 402, so that the expansion board 405 is expanded outward, thereby completing the fixation of the magnetic core 1.

[0021] A rotating seat is installed on the outside of the movable sleeve 402, a connecting seat is installed on the inner side of the expansion plate 405, and a connecting rod 407 is installed between the expansion plate 405 and the movable sleeve 402. When the expansion plate 405 contracts inward, the connecting rod 407 contracts synchronously, thereby driving the movable sleeves 402 to move away from each other, so that the movable sleeve 402 squeezes the spring 406.

[0022] The top of the expansion board 405 is designed with an inclined structure, and a stopper is installed at the bottom of the expansion board 405. The expansion board 405 is connected to the cross board 403 through the stopper. When the expansion board 405 is expanded outward, the slide groove 404 inside the cross board 403 is used to limit the expansion board 405. At the same time, with the design of the stopper, the expansion board 405 can perform linear motion along a straight line. Through the inclined design of the top of the expansion board 405, the smoothness of the magnetic core 1 is greatly improved when it is mounted on the outside of the expansion board 405.

[0023] An extension rod 408 is installed at the bottom of the connecting rod 401, a fixing plate 409 is installed at the bottom of the extension rod 408, and a limiting plate 410 is installed at the top of the connecting rod 401. The design of the limiting plate 410 effectively prevents the movable sleeve 402 from detaching from the outside of the connecting rod 401.

[0024] The fixed frame 3 is composed of an upper frame 301 and a lower frame 302. An arc column 303 is symmetrically installed on the top of the lower frame 302. A receiving groove 304 is opened at the bottom of the lower frame 302 at a position corresponding to the arc column 303. An insert block 305 is installed on the top of the arc column 303. The insert block 305 is designed in a triangular structure. A slot is opened inside the receiving groove 304 at a position corresponding to the insert block 305. The heat dissipation net 5 is symmetrically installed on the outside of the upper frame 301 and the lower frame 302. When the magnetic core 1 is fixed, the insert block 305 is inserted into the inside of the slot, so that the arc column 303 and the receiving groove 304 are fitted together, so that the upper frame 301 and the lower frame 302 are connected as a whole, and the heat generated by the magnetic core 1 is cooled by the heat dissipation net 5.

[0025] Implementation scheme: The magnetic core 1 and the coil 2 are used to filter the common-mode electromagnetic interference signal in the switching power supply of the computer. When the magnetic cores 1 of different sizes need to be fixedly installed to prevent tilting and causing other components to be misaligned during installation, the through slot inside the magnetic core 1 is set on the outside of the expansion board 405, so that the expansion board 405 is retracted inward, and the expansion board 405 is limited by the slide slot 404 inside the cross plate 403. At the same time, with the design of the stopper, the expansion board 405 is made to move linearly along a straight line, so that the connecting rod 407 is synchronously moved. The movable sleeve 402 is further contracted, thereby driving the movable sleeve 402 to move away from each other, so that the movable sleeve 402 squeezes the spring 406, thereby fixing the expansion plate 405 inside the groove, and at the same time, the movable sleeve 402 is reset by the expansion and contraction energy storage of the spring 406, so that the expansion plate 405 expands outward, thereby completing the fixation of the magnetic core 1, and the arc column 303 and the accommodating groove 304 are fitted together by inserting the plug block 305 into the slot, so that the upper frame 301 and the lower frame 302 are connected as one.

[0026] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present invention.

[0027] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A common mode filter inductor, characterized in that: It comprises: a magnetic core, a coil is sleeved on the outside of the magnetic core, a fixing frame is installed on the outside of the coil, a through slot is opened inside the magnetic core, an expansion component is installed inside the through slot; the expansion component is used to clamp and fix the magnetic core inside the fixing frame.

2. A common mode filter inductor according to claim 1, characterized in that: The extension component includes a connecting rod, a movable sleeve, a cross plate, a slide groove, an extension plate and a spring. The connecting rod is installed inside the fixed frame, the movable sleeve is installed at the top and bottom ends of the connecting rod, the cross plate is installed outside the connecting rod and is located below the movable sleeve, the slide groove is opened inside the cross plate, the extension plate is installed inside the slide groove, and the spring sleeve is arranged outside the connecting rod and is located on the side away from the movable sleeve.

3. A common mode filter inductor according to claim 2, characterized in that: A rotating seat is installed on the outside of the moving sleeve, a connecting seat is installed on the inside of the expansion plate, and a connecting rod is installed between the expansion plate and the moving sleeve.

4. A common mode filter inductor according to claim 2, characterized in that: The top of the expansion board is designed as an inclined structure, and a stopper is installed at the bottom of the expansion board. The expansion board is connected to the cross board through the stopper.

5. The common mode filter inductor according to claim 2, characterized in that: An extension rod is installed at the bottom of the connecting rod, a fixing plate is installed at the bottom of the extension rod, and a limiting plate is installed at the top of the connecting rod.

6. The common mode filter inductor according to claim 1, characterized in that: The fixed frame is composed of an upper frame and a lower frame. The top of the lower frame is symmetrically equipped with arc columns, and the bottom of the lower frame is provided with accommodating grooves at positions corresponding to the arc columns.

7. The common mode filter inductor according to claim 6, characterized in that: An insert block is installed on the top of the arc column. The insert block is designed in a triangular structure. A slot is opened at a position corresponding to the insert block inside the accommodating groove. Heat dissipation nets are symmetrically installed on the outside of the upper frame and the lower frame.

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