Inductor with shielding cover

Abstract

The inductor with the shielding case comprises a framework, a magnetic core, a coil and the shielding case, and the shielding case is fixedly arranged on the upper end face of the framework and covers the coil. The shielding cover comprises a top plate part and a peripheral side plate which integrally extends along the lower end of the top plate part, a plurality of heat dissipation holes are formed in the top plate part, and a heat dissipation plate is arranged on the upper end face of the top plate part; a heat dissipation gap is formed between the interior of the peripheral side plate and the exterior of the coil, and a heat conduction piece is arranged in the heat dissipation gap; a second insulating layer is arranged on the outer surface of the peripheral side plate; thus, the heat conduction piece is tightly attached to the coil, the heat conduction piece has good insulation and heat conduction performance, a gap between the shielding case and the coil can be effectively filled, a heat dissipation channel is established, heat of the coil is rapidly conducted to the shielding case and is dissipated through the heat dissipation holes and the heat dissipation plate, and the heat dissipation efficiency of the coil is improved; and the coil is prevented from being damaged due to over-high temperature in the working process.

Description

Technical Field

[0001] This utility model relates to the field of inductors, and in particular to an inductor with a shield. Background Technology

[0002] Inductors are a basic electronic component with a wide range of applications. With the continuous development of the electronic communication industry, the requirements for inductors and other electronic components are becoming increasingly stringent. They are required to be small in size, highly efficient, low in noise, and low in production cost, while also having low losses, fast heat dissipation, and resistance to EMI interference.

[0003] A novel inductor is disclosed in the prior art, comprising a coil, a magnetic core, and a metal shield. The coil is wound around the magnetic core, and the metal shield consists of a top wall, side walls, and a bottom wall. The bottom wall has two openings, and the magnetic core is fixed between the top and bottom walls. The two leads of the coil extend from the openings in the bottom wall. The top and bottom ends of the magnetic core are close to the top and bottom walls of the metal shield, ensuring stable height and allowing the inductor to be mounted on the circuit board, thus improving product quality. The soft magnetic gel on the outer layer of the metal shield and the coil can effectively reduce EMI interference. However, when this shielded inductor is energized, the winding assembly generates heat, but due to the protection of the shield and the gap between the shield and the winding assembly, the heat is difficult to dissipate, resulting in poor heat dissipation.

[0004] Therefore, a new technical solution needs to be researched to address the above problems. Utility Model Content

[0005] In view of this, the present invention addresses the deficiencies of the existing technology and its main purpose is to provide an inductor with a shield. Through the structural design of the shield, it effectively solves the problem in the traditional technology where there is a gap between the shield and the winding assembly, which makes it difficult for heat to dissipate and results in poor heat dissipation.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An inductor with a shield includes a frame, a magnetic core, a coil, and a shield, wherein the magnetic core is mounted on the frame and the coil is wound around the magnetic core;

[0008] The coil is wrapped with a first insulating layer, and leads are connected to both ends of the coil. A terminal post is provided at the bottom end of the lead. The shield is fixed to the upper end face of the frame and covers the coil. The shield includes a top plate and a peripheral side plate integrally extended along the lower end of the top plate. The top plate and the peripheral side plate form a cavity for receiving the coil. The magnetic core and the coil are located inside the cavity.

[0009] The top plate has several heat dissipation holes, and a heat dissipation plate is provided on the upper surface of the top plate; a heat dissipation gap is formed between the inside of the peripheral plate and the outside of the coil, and a heat-conducting element is provided in the heat dissipation gap; a second insulating layer is provided on the outer surface of the peripheral plate.

[0010] As a preferred embodiment, the inner side of the heat-conducting component is provided with a mating groove corresponding to the coil, and the heat-conducting component is sleeved on the outer side of the coil through the mating groove; so that during installation, the mating groove is aligned with the coil, and the heat-conducting component and the coil are tightly fitted together, so as to better dissipate heat.

[0011] As a preferred embodiment, the heat-conducting component is a thermally conductive silicone sheet, which is relatively soft and has good insulation and thermal conductivity. It can effectively fill the gap between the shield and the coil, establish a heat dissipation channel, and quickly conduct the heat of the coil to the shield for heat dissipation, thereby improving the heat dissipation efficiency of the coil and preventing the coil from being damaged due to excessive temperature during operation.

[0012] As a preferred embodiment, the first insulating layer is a neoprene flame-retardant rubber layer, which has good flame-retardant effect, avoids safety accidents caused by excessive temperature, and has high safety.

[0013] As a preferred embodiment, the outer surface of the peripheral side plate is coated with a second insulating layer, which is an insulating varnish.

[0014] As a preferred embodiment, a rubber block is also provided between the inner end face of the top plate and the upper end face of the coil. The rubber block is centrally located on the inner end face of the top plate and is made of high thermal conductivity rubber material. The rubber block ensures that the magnetic core is in close contact with the shielding cover, resulting in better heat dissipation of the inductor and more stable operation.

[0015] As a preferred embodiment, the rubber block and the heat dissipation hole are staggered vertically to prevent blockage between the rubber block and the heat dissipation hole, which would affect the use.

[0016] As a preferred embodiment, a shielding sleeve is fitted onto the surface of the terminal block to shield electromagnetic signals around the pin.

[0017] Compared with the prior art, this utility model has significant advantages and beneficial effects. Specifically, as can be seen from the above technical solution, it mainly achieves this through the structural design of the shielding cover. The shielding cover includes a top plate and peripheral side plates. The top plate is provided with several heat dissipation holes, and a heat dissipation plate is provided on the upper surface of the top plate. A heat dissipation gap is formed between the interior of the peripheral side plates and the exterior of the coil, and a heat-conducting element is provided in the heat dissipation gap. In this way, the heat-conducting element is tightly attached to the coil. The design of the heat-conducting element has good insulation and thermal conductivity, which can effectively fill the gap between the shielding cover and the coil, establish a heat dissipation channel, and quickly conduct the heat of the coil to the shielding cover for heat dissipation through the heat dissipation holes and heat dissipation plate, thereby improving the heat dissipation efficiency of the coil and preventing the coil from being damaged due to excessive temperature during operation.

[0018] To more clearly illustrate the structural features and effects of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0019] Figure 1 This is a front view of an embodiment of the present utility model;

[0020] Figure 2 This is a cross-sectional view of an embodiment of the present utility model;

[0021] Figure 3 yes Figure 2 A partial enlarged view of point A in the middle;

[0022] Figure 4 yes Figure 2 A magnified view of a section at point B in the middle.

[0023] Explanation of reference numerals in the attached diagram:

[0024] 10. Skeleton; 20. Magnetic core

[0025] 30. Coil; 31. Lead wire

[0026] 32. Terminal block 33. Shielding sleeve

[0027] 40. Shielding cover

[0028] 41. Top plate 42. Peripheral side plates

[0029] 43. Ventilation holes 44. Heat sink

[0030] 45. Heat dissipation gap 46. Second insulation layer

[0031] 47. Thermal conductive component; 471. Mating groove

[0032] 48. Rubber block. Detailed Implementation

[0033] Please refer to Figures 1 to 4 As shown, it illustrates the specific structure of an embodiment of the present invention.

[0034] In the description of this utility model, it should be noted that the directional terms such as "up", "down", "front", "back", "left", and "right" indicate the orientation and positional relationship based on the accompanying drawings or the orientation or positional relationship shown when wearing and using the device normally. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this utility model.

[0035] An inductor with a shield includes a frame 10, a magnetic core 20, a coil 30, and a shield 40.

[0036] The magnetic core 20 is mounted on the frame 10, and the coil 30 is wrapped around the magnetic core 20. The coil 30 is wrapped with a first insulating layer. Preferably, the first insulating layer is a neoprene flame-retardant rubber layer, which has a good flame-retardant effect, avoids safety accidents caused by excessive temperature, and has high safety.

[0037] The coil 30 is connected to two ends by leads 31, and the bottom end of the leads 31 is provided with terminals 32. Preferably, a shielding sleeve 33 is fitted onto the surface of the terminal 32. The shielding cover 40 weakens the external electromagnetic field, and the shielding sleeve 33 shields the electromagnetic signals around the pin, thereby achieving the goal of facilitating the shielding of electromagnetic signals and achieving the effect of facilitating the weakening of the electromagnetic field generated by the circuit.

[0038] The shield 40 is fixed to the upper end face of the frame 10 and covers the coil 30; the shield 40 includes a top plate 41 and a peripheral side plate 42 integrally extended along the lower end of the top plate 41, the top plate 41 and the peripheral side plate 42 form a cavity for receiving; the magnetic core 20 and the coil 30 are located in the cavity.

[0039] The top plate 41 has a plurality of heat dissipation holes 43, and a heat dissipation plate 44 is provided on the upper end surface of the top plate 41; a heat dissipation gap 45 is formed between the interior of the peripheral side plate 42 and the exterior of the coil 30, and a heat-conducting element 47 is provided in the heat dissipation gap 45; a second insulating layer 46 is provided on the outer surface of the peripheral side plate 42. Preferably, the outer surface of the peripheral side plate 42 is coated with the second insulating layer 46, which is an insulating varnish.

[0040] Preferably, the inner side of the heat-conducting element 47 is provided with a mating groove 471 corresponding to the coil 30, and the heat-conducting element 47 is sleeved on the outer side of the coil 30 through the mating groove 471; so that during installation, the mating groove 471 corresponds to the coil 30, so that the heat-conducting element 47 and the coil 30 fit tightly together, and heat is better dissipated.

[0041] Preferably, the heat-conducting component 47 is a thermally conductive silicone sheet, which is relatively soft and has good insulation and thermal conductivity. It can effectively fill the gap between the shield 40 and the coil, establish a heat dissipation channel, and quickly conduct the heat of the coil 30 to the shield 40 for heat dissipation, thereby improving the heat dissipation efficiency of the coil 30 and preventing the coil 30 from being damaged due to excessive temperature during operation.

[0042] Preferably, a rubber block 48 is further provided between the inner end face of the top plate portion 41 and the upper end face of the coil 30. The rubber block 48 is centrally located on the inner end face of the top plate portion 41 and is made of a high thermal conductivity rubber material. The rubber block 48 ensures that the magnetic core 20 is in close contact with the shielding cover 40, resulting in better heat dissipation and more stable operation of the inductor. Preferably, the rubber block 48 and the heat dissipation hole 43 are staggered vertically to prevent blockage between the rubber block 48 and the heat dissipation hole 43, which would affect the use.

[0043] The key design feature of this invention lies in the structural design of the shielding cover. The shielding cover includes a top plate and peripheral side plates. The top plate has several heat dissipation holes, and a heat dissipation plate is mounted on its upper surface. A heat dissipation gap is formed between the interior of the peripheral side plates and the exterior of the coil, and a heat-conducting element is installed within this gap. This design ensures that the heat-conducting element is tightly fitted to the coil. The heat-conducting element is designed with good insulation and thermal conductivity, effectively filling the gap between the shielding cover and the coil, establishing a heat dissipation channel, and rapidly transferring the heat from the coil to the shielding cover for dissipation through the heat dissipation holes and heat dissipation plate. This improves the heat dissipation efficiency of the coil and prevents damage to the coil due to excessive temperature during operation.

[0044] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. An inductor with a shielding cover, characterized in that: It includes a frame, a magnetic core, a coil, and a shield, wherein the magnetic core is mounted on the frame and the coil is wound around the magnetic core; The coil is wrapped with a first insulating layer, and leads are connected to both ends of the coil. A terminal post is provided at the bottom end of the lead. The shield is fixed to the upper end face of the frame and covers the coil. The shield includes a top plate and a peripheral side plate integrally extended along the lower end of the top plate. The top plate and the peripheral side plate form a cavity for receiving the coil. The magnetic core and the coil are located inside the cavity. The top plate has several heat dissipation holes, and a heat dissipation plate is provided on the upper surface of the top plate; a heat dissipation gap is formed between the inside of the peripheral plate and the outside of the coil, and a heat-conducting element is provided in the heat dissipation gap; a second insulating layer is provided on the outer surface of the peripheral plate.

2. The inductor with a shielding cover according to claim 1, characterized in that: The inner side of the heat-conducting component has a mating groove corresponding to the coil, and the heat-conducting component is sleeved on the outside of the coil through the mating groove.

3. The inductor with a shielding cover according to claim 1, characterized in that: The heat-conducting component is a thermally conductive silicone sheet.

4. The inductor with a shielding cover according to claim 1, characterized in that: The first insulating layer is a neoprene flame-retardant rubber layer.

5. The inductor with a shielding cover according to claim 1, characterized in that: The outer surface of the peripheral side plate is coated with a second insulating layer, which is insulating varnish.

6. The inductor with a shielding cover according to claim 1, characterized in that: A rubber block is also provided between the inner end face of the top plate and the upper end face of the coil, and the rubber block is centrally located on the inner end face of the top plate.

7. The inductor with a shielding cover according to claim 6, characterized in that: The rubber block and the heat dissipation hole are staggered vertically.

8. The inductor with a shielding cover according to claim 1, characterized in that: A shielding sleeve is fitted onto the surface of the terminal block.

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