Surface-mounted SQ type common mode inductor

Abstract

The utility model provides a patch type SQ common mode inductor which comprises a shell, a magnetic core, a first coil and a second coil, the shell comprises a groove body and four patch pins, the groove body is provided with a frame and a bottom wall, the patch pins are arranged on the outer wall face of the frame, and in the height direction of the frame, the bottom faces of the patch pins are lower than the bottom face of the bottom wall. Or the bottom surfaces of the patch pins are flush with the bottom surface of the bottom wall, the first coil and the second coil are wound on the two sides of the magnetic core respectively, the magnetic core is arranged in the groove body, the two ends of the first coil are wound on the two patch pins respectively, and the two ends of the second coil are wound on the other two patch pins respectively; the patch pin is arranged at the position lower than or flush with the bottom wall of the shell, after the inductor is placed on an electric device to be welded, a worker can weld the inductor through the patch pin, after the patch pin is wound with a coil, a gap is formed between the bottom wall of the shell and the electric device to be welded, the operable space of the corresponding patch pin is large, and therefore the inductor can be conveniently welded. And meanwhile, the welding strength is ensured, and the production efficiency of the inductor is effectively improved.

Description

Technical Field

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

[0002] Inductors are commonly used electronic components in the electrical field. They are used to suppress common-mode signals and improve the electrical characteristics of circuits.

[0003] The existing common-mode inductor includes a magnetic core, a coil and a bracket. The bottom of the magnetic core is installed on the bracket, the bracket is fixed on the circuit board, and the two ends of the coil are connected to the circuit board through pins fixed on the bracket. The existing common-mode inductor is connected to the circuit by plug-in. This connection method requires the accuracy of the inductor and circuit board processing, which leads to an increase in the production cost of the inductor and the circuit board. Utility Model Content

[0004] In view of the deficiencies in the prior art, the present application provides a SQ-type common-mode inductor.

[0005] A SQ-type common-mode inductor disclosed in the present application includes: a shell, a magnetic core, a first coil and a second coil. The shell includes a slot body and four SMD pins. The slot body has a frame and a bottom wall. The SMD pins are arranged on the outer wall surface of the frame. In the height direction of the frame, the bottom surface of the SMD pins is lower than the bottom surface of the bottom wall, or the bottom surface of the SMD pins is flush with the bottom surface of the bottom wall. The first coil and the second coil are respectively wound on both sides of the magnetic core. The magnetic core is arranged in the slot body. The two ends of the first coil are respectively wound on two SMD pins, and the two ends of the second coil are respectively wound on the other two SMD pins.

[0006] Preferably, in the frame height direction, the distance between the bottom surface of the SMD pin and the bottom surface of the bottom wall is at least 0.2 mm.

[0007] Preferably, in the frame height direction, the distance between the bottom surface of the SMD pin and the bottom surface of the bottom wall is 0.3 mm.

[0008] Preferably, the magnetic core and the slot body are fixed by glue pouring.

[0009] Preferably, the magnetic core includes an upper plate body, a lower plate body and two magnetic columns. The upper plate body is parallel to and opposite to the lower plate body and the two magnetic columns are located between the upper plate body and the lower plate body, and the two magnetic columns are respectively located at the two ends of the length direction of the upper plate body and the lower plate body. The upper plate body, the lower plate body and the magnetic columns are integrally formed, and the first coil and the second coil are respectively wound around the two magnetic columns.

[0010] Preferably, the frame includes a first side wall, a second side wall, a third side wall and a fourth side wall connected in sequence, the first side wall is also connected to the fourth side wall, and the first side wall and the third side wall are arranged opposite and parallel; wherein two patch pins are arranged at intervals on the first side wall, two patch pins are arranged at intervals on the third side wall, one end of the first coil is connected to one of the patch pins located on the first side wall, and the other end is connected to one of the patch pins located on the third side wall.

[0011] Preferably, the patch pin includes a winding post and a limit block, one end of the winding post is vertically connected to the outer wall of the frame, the limit block is located at the other end of the winding post and connected to the winding post, and the first coil and the second coil are both wound around the winding post.

[0012] Preferably, the cross-sections of the winding column and the limiting block are both square, and in the height direction of the frame, the bottom surface of the winding column is flush with the bottom surface of the limiting block.

[0013] Preferably, the first coil and the second coil are both flat coils.

[0014] The beneficial effect of the present application is that when the staff tins the SQ-type common-mode inductor, the tin can be set at different SMD pins. By setting the SMD pins at a position lower than or flush with the bottom wall of the shell, after the SMD SQ-type common-mode inductor is placed on the electrical component to be welded, the staff can weld the inductor through the SMD pins. After the SMD pins are wound with coils, there is a gap between the bottom wall of the shell and the electrical component to be welded, and the corresponding SMD pins have a large operating space, while ensuring the welding strength, thereby effectively improving the production efficiency of the SMD SQ-type common-mode inductor. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0016] Figure 1 This is a schematic diagram of the structure of a SQ-type common-mode inductor in an embodiment;

[0017] Figure 2 It is a three-dimensional diagram of the SQ type common mode inductor of the embodiment;

[0018] Figure 3 A three-dimensional diagram of a housing in an embodiment;

[0019] Figure 4 A bottom view of the housing in the embodiment;

[0020] Figure 5 A three-dimensional diagram of a magnetic core in an embodiment;

[0021] Figure 6 It is a three-dimensional diagram of the SQ type common mode inductor in the second embodiment.

[0022] Reference numerals:

[0023] 1-housing; 2-magnetic core; 3-first coil; 4-second coil;

[0024] 11-slot body; 12-chip pin;

[0025] 21-Upper plate body; 22-Lower plate body; 23-Magnetic column;

[0026] 111-frame; 112-bottom wall;

[0027] 121-winding column; 122-limiting block;

[0028] 1111 - first side wall; 1112 - second side wall; 1113 - third side wall; 1114 - fourth side wall. DETAILED DESCRIPTION

[0029] The following will disclose multiple embodiments of the present application with drawings. For the purpose of clear description, many practical details will be described together in the following description. However, it should be understood that these practical details should not be used to limit the present application. In other words, in some embodiments of the present application, these practical details are not necessary. In addition, in order to simplify the drawings, some conventional structures and components will be depicted in a simple schematic manner in the drawings.

[0030] It should be noted that all directional indications such as up, down, left, right, front, back... in the embodiments of the present application are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0031] In addition, in the present application, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present application. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present application.

[0032] In order to further understand the application content, features and effects of the present application, the following embodiments are cited and described in detail with reference to the accompanying drawings.

[0033] See also Figures 1 to 5 The SQ-type common-mode inductor in this example includes a housing 1, a magnetic core 2, a first coil 3 and a second coil 4. The housing 1 is used to load and protect the magnetic core 2. The first coil 3 and the second coil 4 are respectively wound on both sides of the magnetic core 2.

[0034] Among them, the shell 1 includes a slot body 11 and four SMD pins 12, the slot body 11 has a frame 111 and a bottom wall 112, the SMD pins 12 are arranged on the outer wall surface of the frame 111, in the height direction of the frame 111, the lower bottom surface of the SMD pin 12 is lower than the lower bottom surface of the bottom wall 112, or the bottom surface of the SMD pin 12 is flush with the bottom surface of the bottom wall 112, the magnetic core 2 is installed in the slot body 11, and the two ends of the first coil 3 are respectively wound around two opposite SMD pins 12, and the two ends of the second coil 4 are respectively wound around the other two opposite SMD pins 12.

[0035] Specifically, the magnetic core 2 is made of manganese zinc material, the plane where the lower bottom surface of the bottom wall 112 is located is parallel to or coincides with the plane where the lower bottom surface of the patch pin 12 is located, and the first coil 3 and the second coil 4 can be flat wires or round wires.

[0036] When the staff tins the SQ type common mode inductor, the tin can be set at different SMD pins 12. By setting the SMD pins 12 at the bottom wall 112 of the shell 1, the metal tin can be set on the bottom wall 112 close to the SMD pins 12, which reduces the difficulty of tin injection and soldering for the staff. There is a gap between the bottom wall 112 of the shell 1 and the electrical component to be welded, and the welding rod can be inserted between the bottom wall 112 and the electrical component to be welded. The staff does not need to accurately align the SMD pins 12, and the corresponding operating space is large. At the same time, the welding strength is guaranteed, which effectively improves the production efficiency of the SQ type common mode inductor.

[0037] Furthermore, in the height direction of the frame 111 , the distance between the bottom surface of the SMD pin 12 and the bottom surface of the bottom wall 112 is at least 0.2 mm. Specifically, the bottom surface of the SMD pin 12 can be set 0.2-0.5 mm lower than the bottom surface of the bottom wall 112 .

[0038] In actual application, both ends of the first coil 3 and the second coil 4 are wound around the patch pins 12. In order to make the first coil 3 or the second coil 4 significantly lower than the lower bottom surface of the bottom wall 112 and reduce the difficulty of tin injection, the patch pins 12 can be set at least 0.2 mm lower than the bottom wall 112, thereby reserving winding space for the first coil 3 and the second coil 4.

[0039] Furthermore, in the height direction of the frame 111 , the distance between the bottom surface of the SMD pin 12 and the bottom surface of the bottom wall 112 is 0.3 mm.

[0040] In this way, the reserved winding space is optimal.

[0041] Furthermore, the magnetic core 2 and the slot body 11 are fixed by glue pouring.

[0042] In this way, when installing the wound magnetic core 2 , the magnetic core 2 can be installed in the slot 11 and then fixed by glue filling to improve the stability of the magnetic core 2 .

[0043] Furthermore, the magnetic core 2 includes an upper plate body 21, a lower plate body 22 and two magnetic columns 23. The upper plate body 21 and the lower plate body 22 are parallel and opposite to each other. The two magnetic columns 23 are both located between the upper plate body 21 and the lower plate body 22, and the two magnetic columns 23 are respectively located at both ends of the length direction of the upper plate body 21 and the lower plate body 22. The upper plate body 21, the lower plate body 22 and the magnetic columns 23 are integrally formed, and the first coil 3 and the second coil 4 are respectively wound around the two magnetic columns 23.

[0044] Thus, compared with the existing spliced ​​U-shaped magnetic core, the damage of the magnetic flux of the magnetic core 2 can be reduced.

[0045] Furthermore, the frame 111 includes a first side wall 1111, a second side wall 1112, a third side wall 1113 and a fourth side wall 1114 connected in sequence, the first side wall 1111 is also connected to the fourth side wall 1114, and the first side wall 1111 and the third side wall 1113 are arranged opposite to and in parallel; wherein two patch pins 12 are arranged at intervals on the first side wall 1111, and two patch pins 12 are arranged at intervals on the third side wall 1113, one end of the first coil 3 is connected to one of the patch pins 12 located on the first side wall 1111, and the other end is connected to one of the patch pins 12 located on the third side wall 1113.

[0046] In this way, by providing a square housing 1, the window utilization rate of the inductor in the electrical appliance can be improved and the blank area can be reduced.

[0047] Furthermore, the patch pin 12 includes a winding post 121 and a limit block 122. One end of the winding post 121 is vertically connected to the outer wall of the frame 111. The limit block 122 is located at the other end of the winding post 121 and connected to the winding post 121. The first coil 3 and the second coil 4 are both wound around the winding post 121.

[0048] In this way, during the winding process, the limiting block 122 can limit the first coil 3 or the second coil 4 to prevent the first coil 3 or the second coil 4 from falling off.

[0049] Furthermore, the cross-sections of the winding post 121 and the limiting block 122 are both square, and in the height direction of the frame 111 , the bottom surface of the winding post 121 is flush with the bottom surface of the limiting block 122 .

[0050] In this way, the welding area is larger and the welding is stronger.

[0051] Furthermore, the first coil 3 and the second coil 4 are both flat coils.

[0052] In this way, the number of winding turns can be increased.

[0053] Embodiment 2

[0054] See also Figure 6 , which is different from the first embodiment, in this embodiment, the distance between the bottom surface of the SMD pin 12 and the bottom surface of the bottom wall 112 is at least 0.3 mm.

[0055] In this way, soldering and installing the SQ type common mode inductor on the electrical components is more convenient and the production efficiency is higher.

[0056] In summary, when the staff tins the SQ type common-mode inductor, they can place the tin at different SMD pins. By setting the SMD pins at a position lower than or flush with the bottom wall of the shell, after placing the SMD SQ type common-mode inductor on the electrical component to be welded, the staff can weld the inductor through the SMD pins. After the SMD pins are wound with coils, there is a gap between the bottom wall of the shell and the electrical component to be welded, and the corresponding SMD pins have a large operating space. At the same time, the welding strength is guaranteed, which effectively improves the production efficiency of the SMD SQ type common-mode inductor.

[0057] The above is only the implementation mode of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A SQ type common mode inductor, characterized in that: include: A shell (1), a magnetic core (2), a first coil (3) and a second coil (4); the shell (1) comprises a slot body (11) and four patch pins (12); the slot body (11) has a frame (111) and a bottom wall (112); the patch pins (12) are arranged on the outer wall surface of the frame (111); in the height direction of the frame (111), the bottom surface of the patch pin (12) is lower than the bottom surface of the bottom wall (112), or the bottom surface of the patch pin (12) is flush with the bottom surface of the bottom wall (112); the first coil (3) and the second coil (4) are respectively wound on both sides of the magnetic core (2); the magnetic core (2) is arranged in the slot body (11); two ends of the first coil (3) are respectively wound on two of the patch pins (12); and two ends of the second coil (4) are respectively wound on the other two of the patch pins (12).

2. The SQ type common mode inductor according to claim 1, characterized in that: In the height direction of the frame (111), the distance between the bottom surface of the patch pin (12) and the bottom surface of the bottom wall (112) is at least 0.2 millimeters.

3. The SQ type common mode inductor according to claim 1, characterized in that: In the height direction of the frame (111), the distance between the bottom surface of the patch pin (12) and the bottom surface of the bottom wall (112) is 0.3 millimeters.

4. The SQ type common mode inductor according to claim 2, characterized in that: The magnetic core (2) and the slot body (11) are fixed by glue injection.

5. The SQ type common mode inductor according to claim 4, characterized in that: The magnetic core (2) comprises an upper plate (21), a lower plate (22) and two magnetic columns (23); the upper plate (21) and the lower plate (22) are parallel and arranged opposite to each other; the two magnetic columns (23) are located between the upper plate (21) and the lower plate (22); and the two magnetic columns (23) are located at two ends of the length direction of the upper plate (21) and the lower plate (22), respectively; the upper plate (21), the lower plate (22) and the magnetic columns (23) are integrally formed; and the first coil (3) and the second coil (4) are respectively wound around the two magnetic columns (23).

6. The SQ type common mode inductor according to claim 5, characterized in that: The frame (111) comprises a first side wall (1111), a second side wall (1112), a third side wall (1113) and a fourth side wall (1114) which are connected in sequence, the first side wall (1111) is also connected to the fourth side wall (1114), the first side wall (1111) and the third side wall (1113) are arranged opposite to and in parallel; wherein two of the patch pins (12) are arranged at intervals on the first side wall (1111), and another two of the patch pins (12) are arranged at intervals on the third side wall (1113); one end of the first coil (3) is connected to one of the patch pins (12) located on the first side wall (1111), and the other end is connected to one of the patch pins (12) located on the third side wall (1113).

7. The SQ type common mode inductor according to claim 5, characterized in that: The patch pin (12) comprises a winding post (121) and a stop block (122); one end of the winding post (121) is vertically connected to the outer wall surface of the frame (111); the stop block (122) is located at the other end of the winding post (121) and is connected to the winding post (121); the first coil (3) and the second coil (4) are both wound around the winding post (121).

8. The SQ type common mode inductor according to claim 7, characterized in that: The winding post (121) and the limiting block (122) are both square in cross section, and in the height direction of the frame (111), the bottom surface of the winding post (121) is flush with the bottom surface of the limiting block (122).

9. The SQ type common mode inductor according to claim 8, characterized in that: The first coil (3) and the second coil (4) are both flat coils.

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