Plug-in connected common mode inductor

Abstract

The utility model discloses a plug-in type connection common mode inductor, and particularly relates to the technical field of common mode inductors, the plug-in type connection common mode inductor comprises a bottom plate and a protective cover, a magnetic core is arranged at the top of the bottom plate, coils are symmetrically wound on two sides of the magnetic core, and pins are arranged at two ends of each coil. The arrangement position of the magnetic core is limited through the arranged limiting baffle, the magnetic core is fixed through glue, then the protective cover and the bottom plate are combined to further limit protection of the magnetic core, even if the glue is softened due to high temperature to affect the fixing strength, the positioning and mounting effect of the magnetic core is still not affected, the mounting strength is improved, and the service life of the magnetic core is prolonged. The limiting rod and the clamping rod are directly clamped in the middle of the magnetic core to block the two coils, the limiting rod is fixed through cooperation of the connecting column and the connecting inserting groove, the limiting rod and the clamping rod are blocked through strength, the installation stability of the limiting rod and the clamping rod is further improved, and therefore the blocking effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of common mode inductor technology, and more specifically, to a plug-in type common mode inductor. Background Technology

[0002] Common-mode inductors, also known as common-mode chokes, are commonly used in computer switching power supplies to filter common-mode electromagnetic interference signals. In board design, common-mode inductors also serve as EMI filters, used to suppress the outward radiation of electromagnetic waves generated by high-speed signal lines. In essence, a common-mode inductor is a bidirectional filter: on the one hand, it filters out common-mode electromagnetic interference on signal lines, and on the other hand, it suppresses its own electromagnetic interference to avoid affecting the normal operation of other electronic devices in the same electromagnetic environment.

[0003] Chinese patent application CN202322299123.7 discloses a plug-in common mode inductor. The specific structure includes a magnetic ring, coils, and a plastic base. Two coils are symmetrically wound around the magnetic ring to form a magnetic ring coil. The four leads of the two coils are connected to four pins fixedly connected to the bottom of the plastic base and soldered with high-temperature solder to form a high-temperature tin layer. This invention uses pins to fix the coil leads, effectively avoiding the risk of coil pin crossing caused by unfixed leads and differences in lead strength. The pin configuration reduces the risk of solder melting, and the high-temperature soldering process increases the melting point of the solder joint between the pins and the coil leads, preventing melting and effectively solving the problem of solder remelting that may occur during product assembly.

[0004] However, as can be seen from the attached diagram in the instruction manual, the magnetic core and coil are fixed vertically on the base plate with glue. In actual use, the fixing strength of the magnetic core on the base plate is easily affected by the temperature rise or the vibration of the installed equipment, which can easily lead to the separation of the magnetic core from the base plate and affect the installation effect. Moreover, the contact between the two coils is blocked only by a baffle set in the middle of the magnetic core. The blocking effect is easily affected by the instability of the baffle placement. Therefore, a plug-in connection common mode inductor is proposed. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a plug-in common mode inductor to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a plug-in common mode inductor, including a base plate and a protective cover. A magnetic core is provided on the top of the base plate, and coils are symmetrically wound on both sides of the magnetic core. Pins are provided at both ends of the coils. A limit baffle, a connecting post, two card holders, and a stop bar are fixedly connected to the top of the base plate. Pin holes are symmetrically opened around the perimeter of the base plate. The limit baffle can limit the position of the magnetic core and coils, improving the stability of the magnetic core placement. At the same time, glue can be applied to the middle of the limit baffle when installing the magnetic core for easy bonding and fixing. The pin holes facilitate the extension of the pins to the other side of the base plate for fixing.

[0007] A first baffle is fixedly connected to the bottom perimeter of the base plate. Clamping blocks are symmetrically fixedly connected to both sides of the inner cavity of the protective cover. A limiting rod is provided in the middle of the magnetic core. A connecting slot is provided at the bottom of the limiting rod. Clamping rods are symmetrically fixedly connected to both sides of the limiting rod. Through the cooperation of the clamping blocks and the clamping base, the protective cover can be easily placed over the magnetic core to protect the magnetic core and coil. The installation position of the protective cover is limited by the baffle. The first baffle can limit the orientation of the pins, preventing multiple pins from tangling and hindering later soldering. The cooperation of the limiting rod and the clamping rods can separate the two coils, preventing damage to the coil surface and contact, thus acting as a barrier. The cooperation of the connecting post and the connecting slot facilitates the fixing of the limiting rod's position, improving the usage effect.

[0008] Preferably, there are four limiting baffles, which are respectively arranged around the base plate. The cross-sectional shape of the limiting baffles is set to arc shape. The four limiting baffles are arranged around the magnetic core, which can limit the placement position of the magnetic core and facilitate assembly and installation.

[0009] Preferably, the card holder is disposed on one of the top two sides of the base plate, and the bottom of the card holder and the card block engage with each other. The stop strip is disposed on the other two sides of the top of the base plate. The card holder and the card block are adapted to each other, which facilitates the combination and fixation of the protective cover with the base plate, and the stop strip improves the stability of the protective cover installation.

[0010] Preferably, a ball is fixedly connected to the top of the connecting post, the connecting post is adapted to the connecting slot, an elastic ring is provided in the inner cavity of the connecting slot, the connecting slot is adapted to the connecting post, and the connecting post is located in the middle of the connecting slot. The cooperation between the connecting post and the connecting slot improves the stability of the limit rod installation and facilitates the fixing of the limit rod.

[0011] Preferably, a second baffle is fixedly connected to the top of the protective cover. The second baffle corresponds to the locking rod, and the locking rod is adapted to the magnetic core. The two coils are arranged on both sides of the limiting rod. The limiting rod is limited by the second baffle, so that the limiting rod is limited after the protective cover is installed, thereby further improving the stability of the limiting rod installation.

[0012] Preferably, the pins correspond one-to-one with the pin holes. The pins pass through the pin holes and are located in the middle of the first baffle. The cross-sectional shape of the first baffle is set to "U". By inserting the pins into the pin holes, multiple pins are prevented from getting tangled, which would affect the later use effect. The position of the pins is limited by the first baffle, which can improve the installation and fixation effect of the magnetic core while preventing multiple pins from getting tangled, and facilitates later connection and use.

[0013] The technical effects and advantages of this utility model are as follows:

[0014] 1. This utility model first limits the placement position of the magnetic core by setting a limiting baffle and fixes it with glue. Then, the protective cover and base plate are combined to further limit the magnetic core protection. Even if the glue softens due to high temperature and affects the fixing strength, it will not affect the positioning and installation effect of the magnetic core, thus improving the installation strength. Furthermore, the limiting rod and the locking rod are directly locked in the middle of the magnetic core to block the two coils. The limiting rod is fixed by the cooperation of the connecting post and the connecting slot. The limiting rod and the locking rod are blocked by force, which further improves the installation stability of the limiting rod and the locking rod, thereby improving the blocking effect.

[0015] 2. This utility model also facilitates the connection and engagement of the protective cover and the base plate through the cooperation of the set card block and card seat, and improves the stability of the protective cover installation by limiting the other two sides of the protective cover through the baffle strip. At the same time, the set pin hole facilitates the pin to pass through and be positioned. By bending the pin and inserting it into the inside of the first baffle, the orientation position of the pin can be positioned to avoid the phenomenon of multiple pins getting tangled during the movement, thus improving the effect of later use.

[0016] In summary, through the interaction of the above-mentioned multiple effects, the magnetic core installation and positioning effect can be improved, loosening can be avoided, and the installation and fixing strength of the limit rod can be increased, preventing the two coils from contacting each other and improving the blocking and fixing effect. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0018] Figure 2 This is a schematic diagram showing the disassembled structure of the base plate and protective cover of this utility model.

[0019] Figure 3 This is a schematic diagram of the overall disassembled structure of this utility model.

[0020] Figure 4 This is a top view of the structure of this utility model.

[0021] Figure 5 This is a schematic diagram of the cross-sectional structure of the limiting rod of this utility model.

[0022] The attached diagram is labeled as follows: 1. Base plate; 2. Protective cover; 3. Magnetic core; 4. Coil; 5. Pin; 6. Limiting baffle; 7. Connecting post; 8. Pin hole; 9. First baffle; 10. Card holder; 11. Stop bar; 12. Card block; 13. Limiting rod; 14. Connecting slot; 15. Card rod; 16. Second baffle. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] As attached Figure 1-5 The plug-in common mode inductor shown includes a base plate 1 and a protective cover 2. A magnetic core 3 is provided on the top of the base plate 1, and coils 4 are symmetrically wound on both sides of the magnetic core 3. Both ends of the coils 4 are provided with pins 5. A limit baffle 6, a connecting post 7, two card holders 10 and a stop bar 11 are fixedly connected to the top of the base plate 1. Pin holes 8 are symmetrically opened around the perimeter of the base plate 1. The position of the magnetic core 3 and the coils 4 can be limited by the limit baffle 6 to improve the stability of the magnetic core 3. At the same time, glue can be applied to the middle of the limit baffle 6 when installing the magnetic core 3 to facilitate bonding and fixing. The pin holes 8 facilitate the extension of the pins 5 to the other side of the base plate 1 and fixation.

[0025] A first baffle 9 is fixedly connected to the bottom perimeter of the base plate 1. A locking block 12 is symmetrically fixedly connected to both sides of the inner cavity of the protective cover 2. A limiting rod 13 is provided in the middle of the magnetic core 3. A connecting slot 14 is provided at the bottom of the limiting rod 13. Locking rods 15 are symmetrically fixedly connected to both sides of the limiting rod 13. Through the cooperation of the locking seat 10 and the locking block 12, the protective cover 2 can be easily placed over the magnetic core 3 to protect the magnetic core 3 and the coil 4. The installation position of the protective cover 2 is limited by the baffle 11. The first baffle 9 can limit the orientation of the pins 5, preventing multiple pins 5 from tangling and making subsequent soldering inconvenient. The cooperation of the limiting rod 13 and the locking rod 15 can separate the two coils 4, preventing damage to the surface of the coils 4 and contact, thus acting as a barrier. The cooperation of the connecting post 7 and the connecting slot 14 facilitates the fixing of the position of the limiting rod 13, improving the usage effect.

[0026] As attached Figure 1-5 As shown, there are four limiting baffles 6, which are respectively set around the base plate 1. The cross-sectional shape of the limiting baffles 6 is set as arc. The four limiting baffles 6 are set around the magnetic core 3. The card holder 10 is set on the top of the base plate 1 on both sides. The bottom of the card holder 10 and the card block 12 are engaged. The baffle strip 11 is set on the other two sides of the top of the base plate 1. A ball is fixedly connected to the top of the connecting post 7. The connecting post 7 is adapted to the connecting slot 14. An elastic ring is set in the inner cavity of the connecting slot 14. The connecting slot 14 is adapted to the connecting post 7. The connecting post 7 is set in the middle of the connecting slot 14. The top of the protective cover 2 is fixedly connected to the second baffle 16. The second baffle 16 corresponds to the card rod 15. The card rod 15 is adapted to the magnetic core 3. Two coils 4 are set on both sides of the limiting rod 13. The pins 5 correspond one-to-one with the pin holes 8. The pins 5 pass through the pin holes 8 and are located on the first baffle 9. In the middle, the first baffle 9 has a U-shaped cross-section. The positioning baffle 6 limits the placement of the magnetic core 3, facilitating assembly and installation. The card holder 10 and card block 12 are compatible to facilitate the assembly and fixation of the protective cover 2 and the base plate 1. The baffle 11 improves the stability of the protective cover 2 installation. The connecting post 7 and connecting slot 14 improve the stability of the limiting rod 13 installation and facilitate the fixation of the limiting rod 13. The second baffle 16 limits the limiting rod 13, ensuring that the limiting rod 13 is fixed after the protective cover 2 is installed, further improving the stability of the limiting rod 13 installation. The pin 5 is inserted into the pin hole 8 to prevent multiple pins 5 from getting tangled, which would affect the later use effect. The first baffle 9 limits the position of the pin 5, which can improve the installation and fixation effect of the magnetic core 3 while preventing multiple pins 5 from getting tangled, facilitating later connection and use.

[0027] The working principle of this utility model is as follows: When in use, two coils 4 are wound around the two sides of the magnetic core 3, and glue is applied to the middle position of the limiting baffle 6 on the base plate 1. The magnetic core 3 is placed between multiple limiting baffles 6 and fixed by glue. Then, the pin 5 is inserted into the inside of the pin hole 8 and the pin 5 is stuck in the middle of the first baffle 9.

[0028] Then, the locking rod 15 is inserted into the magnetic core 3 so that the connecting post 7 is inserted into the inside of the connecting slot 14 to limit the limiting rod 13. At this time, the locking rod 15 can block the coils 4 on both sides of the magnetic core 3 to avoid damage to the surface of the coils 4 and thus prevent connection failure.

[0029] Then, the protective cover 2 is placed on the base plate 1 to protect the magnetic core 3, while the second baffle 16 corresponds to the locking rod 15. At this time, the locking block 12 engages with the locking seat 10, and the protective cover 2 is limited by the stop strip 11, thereby improving the connection strength between the protective cover 2 and the base plate 1 and realizing the combined installation.

[0030] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A plug-in common mode inductor, comprising a base plate (1) and a protective cover (2), characterized in that: The top of the base plate (1) is provided with a magnetic core (3), and coils (4) are symmetrically wound on both sides of the magnetic core (3). Both ends of the coils (4) are provided with pins (5). The top of the base plate (1) is fixedly connected with a limit baffle (6), a connecting post (7), two card seats (10) and a baffle (11). The base plate (1) is symmetrically provided with pin holes (8) around its perimeter. The bottom of the base plate (1) is fixedly connected to the four sides of the bottom. The inner cavity of the protective cover (2) is symmetrically fixedly connected to the two sides of the clamping blocks (12). The magnetic core (3) is provided with a limit rod (13) in the middle. The bottom of the limit rod (13) is provided with a connecting slot (14). The two sides of the limit rod (13) are symmetrically fixedly connected to the clamping rods (15).

2. The plug-in common mode inductor according to claim 1, characterized in that: The number of the limiting baffles (6) is four. The limiting baffles (6) are respectively arranged around the bottom plate (1). The cross-sectional shape of the limiting baffles (6) is set to arc shape. The four limiting baffles (6) are arranged around the magnetic core (3).

3. The plug-in common mode inductor according to claim 1, characterized in that: The card holder (10) is located on one of the top sides of the base plate (1), and the bottom of the card holder (10) and the card block (12) are engaged. The baffle (11) is located on the other two sides of the top of the base plate (1).

4. The plug-in common mode inductor according to claim 1, characterized in that: A ball is fixedly connected to the top of the connecting post (7). The connecting post (7) is adapted to the connecting slot (14). An elastic ring is provided in the inner cavity of the connecting slot (14). The connecting slot (14) is adapted to the connecting post (7). The connecting post (7) is located in the middle of the connecting slot (14).

5. The plug-in common mode inductor according to claim 1, characterized in that: The top of the protective cover (2) is fixedly connected to a second baffle (16), which corresponds to the locking rod (15). The locking rod (15) is adapted to the magnetic core (3), and the two coils (4) are arranged on both sides of the limiting rod (13).

6. The plug-in common mode inductor according to claim 1, characterized in that: The pin (5) corresponds one-to-one with the pin hole (8). The pin (5) passes through the pin hole (8) and is located in the middle of the first baffle (9). The cross-sectional shape of the first baffle (9) is set to "U".

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