Pouring inductor

Abstract

The utility model relates to the technical field of electronic components, in particular to a pouring inductor, which is characterized in that firstly, pins of a hollow coil are bent to extend along the horizontal direction after being led out of a plastic shell, so that the pins horizontally extend to the periphery of the plastic shell after being welded and mounted; a subsequent AOI lens can conveniently detect the welding condition of the pin; and secondly, the two hollow coils are stacked and arranged in the plastic shell, and magnetic slurry is poured into the plastic shell after the plastic base is covered, so that the height size of the inductor can be reduced, and the inductor is suitable for the situation that the installation height or the installation space is limited.

Description

Technical Field

[0001] This utility model relates to the field of electronic components technology, and in particular to a cast inductor. Background Technology

[0002] An inductor, also known as an inductor coil, choke, or reactor, is a component that converts electrical energy into magnetic energy and stores it. In circuits, it plays a role in filtering noise, stabilizing current, and suppressing electromagnetic interference. With the continuous advancement of electronic technology, electronic components are becoming increasingly miniaturized and integrated, and the requirements for the safety, reliability, and stability of inductor components are becoming increasingly stringent.

[0003] The applicant discovered the following problems with existing inductors on the market:

[0004] 1. The pins extend vertically from one end of the housing. After the inductor is soldered and assembled, the pins are blocked by the housing, and the AOI lens cannot take pictures of the pins from above or at an angle, making it difficult to detect the assembly and soldering of the inductor.

[0005] 2. The stacking of two air coils inside the housing causes the overall height of the inductor to exceed the limit, making the existing design unusable in situations where installation height is limited. Utility Model Content

[0006] To achieve the above objectives, this utility model provides a cast inductor, comprising:

[0007] A plastic housing, one end of which is open and has an installation chamber formed therein;

[0008] Two hollow coils are fixed in the mounting cavity. The hollow coils are made of flat sheet material and have a gap between adjacent turns. The turns of the two hollow coils are staggered and stacked. The leads of the hollow coils are bent to extend in the horizontal direction.

[0009] A plastic base, which is fixed to the open end of the plastic shell, and an injection hole is provided in the middle of the plastic base;

[0010] Magnetic slurry is poured from the injection hole to fill the gap between the plastic housing and the plastic base.

[0011] In some possible embodiments, the bottom of the mounting chamber has a supporting rib protruding from it, and the hollow coil is placed on the supporting rib.

[0012] In some possible embodiments, a positioning groove is provided on the open end face of the plastic housing, the width of the positioning groove is adapted to the width of the flat sheet, and the pins extend horizontally from the positioning groove to both sides of the lower end of the plastic housing.

[0013] In some possible embodiments, a mounting groove is also provided on the open end face of the plastic housing, and the plastic base can be snapped into the mounting groove.

[0014] In some possible embodiments, the two opposite wings of the mounting slot are provided with horizontally inwardly oriented slots, the plastic base is plate-shaped and has a locking block formed on its side end, the locking block can be locked into the slot.

[0015] In some possible embodiments, the pins are bent and protrude horizontally from the lower end face of the housing.

[0016] In some possible embodiments, the injection hole is waist-shaped.

[0017] Compared with the prior art, the advantages of this utility model are as follows: First, the cast inductor of this utility model bends the leads of the hollow coil to extend horizontally after they are led out of the plastic shell, so that after welding and installation, the leads extend horizontally to the outside of the plastic shell, which facilitates the subsequent AOI lens to detect the welding status of the leads; Second, this utility model adopts a design of two hollow coils stacked and placed in the plastic shell. After covering with the plastic base, magnetic paste is poured into the plastic shell. This design can reduce the height of the inductor, making it suitable for situations where the installation height or installation space is limited. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A three-dimensional assembly structure diagram of the cast inductor provided in this embodiment of the utility model;

[0020] Figure 2 Axonometric view of the cross-sectional structure of the cast inductor provided in this embodiment of the utility model;

[0021] Figure 3 A three-dimensional structural diagram of two hollow coils stacked together is provided for an embodiment of this utility model.

[0022] Reference numerals: 10. Plastic housing; 11. Mounting chamber; 12. Hollow coil; 13. Pin; 14. Plastic base; 15. Magnetic paste; 16. Support rib; 17. Positioning groove; 18. Mounting groove; 19. Slot; 20. Slotting block; 21. Injection hole. 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] Reference Figures 1 to 3 The illustrated cast inductor includes a plastic housing 10, two hollow coils 12, a plastic base 14, and magnetic paste 15. The plastic housing 10 has an installation chamber 11 formed within it, with one end open. The two hollow coils 12 are stacked and placed within the installation chamber 11. The plastic base 14 has an injection hole 21 and is fixedly fitted to the open end of the plastic housing 10. The injection hole 21 is oblong. The magnetic paste 15 is poured through the injection hole 21 and fills the installation chamber 11. After the magnetic paste 15 cures, the cast inductor of this invention is obtained. Specifically, the hollow coils 12 are formed by winding flat sheets, and the hollow coils 12... There is a certain gap between two adjacent coil turns, the size of which is equivalent to the thickness of the flat sheet. The two hollow coils 12 are connected by their layers of coils being stacked alternately. Compared with the existing structure of two hollow coils 12 stacked one on top of the other, the present invention can reduce the height of the cast inductor and is suitable for situations where the installation height is limited. The two ends of the hollow coil 12 are formed with pins 13. The pins 13 extend from the open end of the plastic housing 10 and are bent horizontally to extend horizontally to the side of the plastic housing 10, so that the AOI lens can capture the soldering of the pins 13 from a top view or a top-down oblique view after the cast inductor is installed.

[0025] In some possible embodiments, the bottom of the mounting chamber 11 has a plurality of supporting ribs 16, which are distributed circumferentially. Two hollow coils 12 are stacked and placed in the mounting chamber 11 and supported by the supporting ribs 16. The magnetic paste 15 can fill the gap between the bottom of the mounting chamber 11 and the lower end face of the hollow coil 12. This design limits the distance between the hollow coil 12 and the bottom of the plastic housing.

[0026] In some possible embodiments, a positioning groove 17 is provided on the open end face of the plastic housing 10. The width of the positioning groove 17 is adapted to the width of the flat sheet. After the hollow coil 12 is placed into the mounting chamber 11, the pin 13 can overlap on the positioning groove 17 to achieve positioning between the hollow coil 12 and the plastic housing 10. The pin 13 also extends horizontally outward from the positioning groove 17 so that the AOI lens can take a top view of the extended pin 13 after the cast inductor is assembled by welding.

[0027] In some possible embodiments, a mounting groove 18 is provided on the open end face of the plastic housing 10, and the plastic base 14 can be snapped and fixed in the mounting groove 18 to ensure that the plastic base 14 will not shift when the magnetic slurry 15 is poured; further reference Figure 2 As shown, the mounting groove 18 has horizontally inwardly oriented slots 19 on both opposite wings. The plastic base 14 is flat, and a horizontally protruding locking block 20 is formed on the side end of the plastic base 14. During installation, the locking block 20 can be locked into the slot 19 to fix the plastic base 14 to the plastic shell 10.

[0028] In some possible embodiments, the pins 13 are bent and protrude horizontally from the lower end face of the housing, and the protrusion height of the four pins 13 is consistent to ensure that the cast inductor can be soldered and assembled well and stably on the circuit board.

[0029] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A cast inductor, characterized in that, include: A plastic housing (10) has one open end and an installation chamber (11) formed therein; Two hollow coils (12) are fixed in the mounting chamber (11). The hollow coils (12) are made of flat sheet material and have a gap between adjacent turns. The leads (13) of the hollow coils (12) are bent to extend in the horizontal direction. A plastic base (14) is fixedly mounted on the open end of the plastic shell (10), and an injection hole (21) is provided in the middle of the plastic base (14); Magnetic slurry (15) is poured from the injection hole (21) to fill the gap between the plastic housing (10) and the plastic base (14).

2. The cast inductor according to claim 1, characterized in that, The bottom of the mounting chamber (11) has a protruding support rib (16), and the hollow coil (12) is placed on the support rib (16).

3. The cast inductor according to claim 1, characterized in that, The plastic housing (10) has a positioning groove (17) on its open end face. The width of the positioning groove (17) is adapted to the width of the flat sheet. The pin (13) extends horizontally from the positioning groove (17) to both sides of the lower end of the plastic housing (10).

4. A cast inductor according to claim 1, characterized in that, The plastic housing (10) has an open end face with an installation groove (18) and the plastic base (14) can be fitted into the installation groove (18).

5. A cast inductor according to claim 4, characterized in that, The mounting groove (18) has horizontally inwardly oriented slots (19) on both opposite wings. The plastic base (14) is plate-shaped and has a locking block (20) formed on its side end. The locking block (20) can be locked into the slot (19).

6. A cast inductor according to claim 1, characterized in that, The pin (13) protrudes horizontally from the lower end face of the housing after being bent.

7. A cast inductor according to claim 1, characterized in that, The injection hole (21) is waist-shaped.

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