Electromagnetic shielding structure of wireless charging seat

Abstract

The utility model relates to the technical field of wireless charging seats, and discloses an electromagnetic shielding structure of a wireless charging seat, which comprises a seat body, an inner cavity is arranged in the seat body, an electromagnetic coil, a circuit board and a shielding cover are arranged in the inner cavity, the shielding cover is provided with a shielding cavity with an opening at the front end, and the front end face of the electromagnetic coil is covered with a flexible circuit layer. The rear end of the shielding cover is covered with two metal film layers, the peripheries of the two metal film layers extend outwards away from the rear end of the shielding cover to form an annular peripheral part, and the periphery of the shielding cover is covered with the peripheral part; the electromagnetic coil and the circuit board are wrapped and clamped by the base body through the shielding cover and the flexible circuit layer, so that the electromagnetic interference of the electromagnetic coil in the charging process is reduced, the shielding cover blocks the peripheral gap and the opening through the peripheral parts of the two metal film layers, the electromagnetic interference of the electromagnetic coil in the charging process is reduced, and the charging quality of the electromagnetic coil is improved. Therefore, the electromagnetic shielding effect of the wireless charging base is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of wireless charging bases, and in particular to an electromagnetic shielding structure of a wireless charging base. Background Art

[0002] Wireless charging technology, also known as inductive charging or contactless charging, uses near-field induction, or inductive coupling, to transfer energy from the power supply device (i.e., the transmitter) to the power-consuming device (i.e., the receiver). The main feature of wireless charging technology is the close-range inductive coupling of the contactless coupling transformer, which is similar to a conventional resonant switching power supply.

[0003] At present, during the production process of wireless chargers, the front end face, rear end face, left end face, right end face, upper end face and lower end face of the wireless charger need to be subjected to electromagnetic testing to confirm whether the electromagnetic interference meets the factory standards. In the prior art, wireless charging products have a shielding cover, which is a material used to shield electromagnetic interference. By covering the wireless charger with the shielding cover, the electromagnetic interference of the wireless charger is reduced, so that the electromagnetic interference of the wireless charger can meet the factory standards during the electromagnetic testing process. However, there will still be some gaps, openings and notches when the shielding cover is installed in the wireless charger, which leads to the problem of poor electromagnetic shielding effect of the wireless charger. Utility Model Content

[0004] The purpose of the utility model is to provide an electromagnetic shielding structure of a wireless charger, aiming to solve the problem of poor electromagnetic shielding effect of the wireless charger in the prior art.

[0005] The utility model is implemented as follows: the electromagnetic shielding structure of the wireless charging seat comprises a seat body, the seat body has an inner cavity, the inner cavity is provided with an electromagnetic coil, a circuit board and a shielding cover, the shielding cover has a shielding cavity with a front end opening, the circuit board and the electromagnetic coil are arranged in a superimposed manner, the electromagnetic coil and the circuit board are placed in the shielding cavity, and the front end surface of the electromagnetic coil is exposed at the front end opening;

[0006] The front end surface of the electromagnetic coil is covered with a flexible circuit layer, and the rear end of the shielding cover is covered with two metal film layers. The outer peripheries of the two metal film layers extend outward away from the rear end of the shielding cover to form a ring-shaped outer periphery, which covers the outer periphery of the shielding cover.

[0007] Furthermore, the rear end surface of the electromagnetic coil is covered with an internal copper film layer.

[0008] Furthermore, the electromagnetic coil is located on the front end of the circuit board.

[0009] Furthermore, the two metal film layers include an outer copper film layer and an outer aluminum film layer which are arranged in a stacked manner.

[0010] Furthermore, along the direction away from the rear end of the shielding cover, the outer copper film layer and the outer aluminum film layer are stacked and arranged in sequence.

[0011] Furthermore, the shielding cover includes a rear end wall and a peripheral wall formed on the periphery of the rear end wall, and the rear end wall and the peripheral wall enclose a shielding cavity with a front end opening; the two metal film layers cover the rear end wall, and the peripheral part covers the peripheral wall.

[0012] Furthermore, a disc-shaped fixing groove is provided in the inner cavity, and the electromagnetic coil is embedded in the fixing groove.

[0013] Furthermore, a plurality of limiting protrusions are provided on the periphery of the fixing groove, and adjacent limiting protrusions form a limiting interval; the circuit board has a limiting section, the limiting section is placed in the limiting interval, and the limiting protrusions limit the circumferential movement of the circuit board.

[0014] Furthermore, a notch is formed on the outer periphery of the shielding cover, and the limiting section passes through the notch; when the limiting section passes through the notch, the outer periphery closes the notch.

[0015] Furthermore, the inner side wall of the seat body has an end surface facing the rear end of the shielding cover, and the end surface is covered with a shielding layer, and the shielding layer is arranged opposite to the rear end wall of the shielding cover.

[0016] Compared with the prior art, the electromagnetic shielding structure of the wireless charger provided by the utility model is that the seat body wraps and clamps the electromagnetic coil and the circuit board through the shielding cover and the flexible circuit layer, thereby reducing the electromagnetic interference of the electromagnetic coil during the charging process. The shielding cover then uses the peripheral parts of the two metal film layers to seal the peripheral gaps and openings, thereby reducing the electromagnetic interference to the electromagnetic coil during the charging process, so as to improve the electromagnetic shielding effect of the wireless charger, and solve the problem of poor electromagnetic shielding effect of the wireless charger. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional schematic diagram of the electromagnetic shielding structure of the wireless charging station provided by the utility model;

[0018] Figure 2 It is a top view cutaway stereoscopic schematic diagram of the seat body provided by the utility model;

[0019] Figure 3 It is a bottom-up cutaway perspective diagram of the seat provided by the utility model;

[0020] Figure 4 It is a schematic diagram of the front view cross-section structure of the shielding cover and the metal film layer provided by the utility model;

[0021] Figure 5It is an expanded three-dimensional schematic diagram of the shielding cover and the metal film layer provided by the utility model.

[0022] In the figure: a seat body 10, an electromagnetic coil 20, a circuit board 30, a shielding cover 40, a flexible circuit layer 50, a metal film layer 60, an inner cavity 11, a fixing groove 12, a limiting protrusion 13, a limiting interval 14, an internal copper film layer 21, a limiting section 31, a shielding cavity 41, a rear end wall 42, an outer peripheral wall 43, a notch 44, an outer peripheral portion 61, an external copper film layer 62, and an external aluminum film layer 63. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0024] The implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0025] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of the present utility model, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on the present utility model. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0026] Reference Figure 1-5 As shown, it is a preferred embodiment provided by the utility model.

[0027] The electromagnetic shielding structure of the wireless charging base includes a base body 10, the base body 10 has an inner cavity 11, the inner cavity 11 is provided with an electromagnetic coil 20, a circuit board 30 and a shielding cover 40, the shielding cover 40 has a shielding cavity 41 with a front end opening, the circuit board 30 and the electromagnetic coil 20 are arranged in an overlapping manner, the electromagnetic coil 20 and the circuit board 30 are placed in the shielding cavity 41, and the front end surface of the electromagnetic coil 20 is exposed at the front end opening;

[0028] The front end surface of the electromagnetic coil 20 is covered with a flexible circuit layer 50, and the rear end of the shielding cover 40 is covered with two metal film layers 60. The outer periphery of the two metal film layers 60 extends outward away from the rear end of the shielding cover 40 to form a ring-shaped outer peripheral portion 61, which covers the outer periphery of the shielding cover 40.

[0029] In the electromagnetic shielding structure of the wireless charger provided above, the seat body 10 wraps and clamps the electromagnetic coil 20 and the circuit board 30 through the shielding cover 40 and the flexible circuit layer 50, thereby reducing the electromagnetic interference of the electromagnetic coil 20 during the charging process. The shielding cover 40 then uses the peripheral parts 61 in the two metal film layers 60 to seal its peripheral gaps and openings, thereby reducing the electromagnetic interference to the electromagnetic coil 20 during the charging process, so as to improve the electromagnetic shielding effect of the wireless charger, and solve the problem of poor electromagnetic shielding effect of the wireless charger.

[0030] The shielding cover 40 encloses the electromagnetic coil 20 and the circuit board 30 through the shielding cavity 41, which can reduce electromagnetic interference.

[0031] In this embodiment, the rear end surface of the electromagnetic coil 20 is covered with an internal copper film layer 21. In this way, the electromagnetic coil 20 can be wrapped and clamped by the internal copper film layer 21 and the flexible circuit layer 50, thereby reducing the electromagnetic interference of the electromagnetic coil 20 during the charging process and improving the electromagnetic shielding effect.

[0032] In this embodiment, the electromagnetic coil 20 is located on the front end of the circuit board 30. In this way, the electromagnetic coil 20 can be closer to the object to be charged, thereby improving the charging efficiency of the electromagnetic coil 20.

[0033] The two metal film layers 60 include an outer copper film layer 62 and an outer aluminum film layer 63 in a stacked arrangement.

[0034] Along the direction away from the rear end of the shielding cover 40 , the outer copper film layer 62 and the outer aluminum film layer 63 are stacked in sequence.

[0035] In this embodiment, the shielding cover 40 includes a rear wall 42 and an outer peripheral wall 43 formed on the periphery of the rear wall 42, and the rear wall 42 and the outer peripheral wall 43 enclose a shielding cavity 41 with a front opening; two metal film layers 60 cover the rear wall 42, and the outer peripheral portion 61 covers the outer peripheral wall 43. In this way, the two metal film layers 60 can block the gap and opening of the outer peripheral wall 43 of the shielding cover 40 through the outer peripheral portion 61, thereby reducing the electromagnetic interference to the electromagnetic coil 20 during the charging process, so as to improve the electromagnetic shielding effect of the wireless charger.

[0036] In this embodiment, a disc-shaped fixing groove 12 is provided in the inner cavity 11, and the electromagnetic coil 20 is embedded in the fixing groove 12. In this way, the electromagnetic coil 20 can be prevented from moving at will, and the electromagnetic shielding effect of the electromagnetic coil 20 is increased.

[0037] In this embodiment, a plurality of limiting protrusions 13 are provided on the periphery of the fixing groove 12, and adjacent limiting protrusions 13 form a limiting interval 14; the circuit board 30 has a limiting section 31, the limiting section 31 is placed in the limiting interval 14, and the limiting protrusions 13 limit the circumferential movement of the circuit board 30.

[0038] The fixing groove 12 positions the limiting section 31 through a plurality of limiting protrusions 13 and limiting intervals 14 , thereby increasing the protection of the circuit board 30 .

[0039] In this embodiment, a notch 44 is formed on the outer periphery of the shielding cover 40, and the limiting section 31 passes through the notch 44. This is to allow the wires on the circuit board 30 to be connected and to increase the position of the limiting section 31.

[0040] In this embodiment, after the limiting section 31 is inserted into the notch 44, the peripheral portion 61 closes the notch 44. In this way, the peripheral portions 61 in the two metal film layers 60 can close the notch 44, thereby reducing the electromagnetic interference to the electromagnetic coil 20 during the charging process, so as to improve the electromagnetic shielding effect of the wireless charger.

[0041] In this embodiment, the inner side wall of the base body 10 has an end surface facing the rear end of the shielding cover 40, and the end surface is covered with a shielding layer, which is arranged opposite to the rear end wall 42 of the shielding cover 40. In this way, the shielding effect of electromagnetic interference can be increased.

[0042] The shielding layer is made of shielding material or is an electroplating layer.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. The electromagnetic shielding structure of the wireless charging station is characterized by: The invention comprises a seat body, wherein the seat body has an inner cavity, wherein an electromagnetic coil, a circuit board and a shielding cover are arranged in the inner cavity, wherein the shielding cover has a shielding cavity with a front end opening, wherein the circuit board and the electromagnetic coil are arranged in an overlapping manner, wherein the electromagnetic coil and the circuit board are placed in the shielding cavity, and wherein the front end surface of the electromagnetic coil is exposed at the front end opening; The front end surface of the electromagnetic coil is covered with a flexible circuit layer, and the rear end of the shielding cover is covered with two metal film layers. The outer peripheries of the two metal film layers extend outward away from the rear end of the shielding cover to form a ring-shaped outer periphery, which covers the outer periphery of the shielding cover.

2. The electromagnetic shielding structure of the wireless charging station as claimed in claim 1, characterized in that: The rear end face of the electromagnetic coil is covered with an inner copper film layer.

3. The electromagnetic shielding structure of the wireless charging station as claimed in claim 1, characterized in that: The electromagnetic coil is located on the front end of the circuit board.

4. The electromagnetic shielding structure of the wireless charging station according to any one of claims 1 to 3, characterized in that: The two metal film layers include an outer copper film layer and an outer aluminum film layer in a stacked arrangement.

5. The electromagnetic shielding structure of the wireless charging station as claimed in claim 4, characterized in that: Along the direction away from the rear end of the shielding case, the outer copper film layer and the outer aluminum film layer are stacked and arranged in sequence.

6. The electromagnetic shielding structure of the wireless charging station according to any one of claims 1 to 3, characterized in that: The shielding cover includes a rear end wall and a peripheral wall formed on the periphery of the rear end wall, the rear end wall and the peripheral wall enclose a shielding cavity with a front end opening; the two metal film layers cover the rear end wall, and the peripheral part covers the peripheral wall.

7. The electromagnetic shielding structure of the wireless charging station as claimed in claim 6, characterized in that: A disc-shaped fixing groove is arranged in the inner cavity, and the electromagnetic coil is embedded in the fixing groove.

8. The electromagnetic shielding structure of the wireless charging station as claimed in claim 7, characterized in that: A plurality of limiting protrusions are arranged on the periphery of the fixing groove, and adjacent limiting protrusions form a limiting interval; the circuit board has a limiting section, and the limiting section is arranged in the limiting interval, and the limiting protrusions limit the circumferential movement of the circuit board.

9. The electromagnetic shielding structure of the wireless charging station as claimed in claim 8, characterized in that: A notch is formed on the outer periphery of the shielding cover, and the limiting section passes through the notch; when the limiting section passes through the notch, the outer periphery closes the notch.

10. The electromagnetic shielding structure of the wireless charging station as claimed in claim 9, characterized in that: The inner side wall of the seat body is provided with a facing end surface facing the rear end of the shielding cover, the facing end surface is covered with a shielding layer, and the shielding layer is arranged opposite to the rear end wall of the shielding cover.

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