Electromagnetic shielding cover

Abstract

The utility model discloses an electromagnetic shielding cover which comprises a cover body and is characterized in that the cover body is connected with a shielding plate, the end face of the cover body is provided with a plurality of first heat dissipation holes, the shielding plate is provided with a plurality of second heat dissipation holes, and any first heat dissipation hole and any second heat dissipation hole are arranged in a mutually staggered mode. Electromagnetic waves are prevented from entering the cover body through the first heat dissipation holes and / or the second heat dissipation holes. The first heat dissipation holes and the second heat dissipation holes transmit heat in the cover body out of the cover body through air, electronic components in the cover body are prevented from being affected in performance or damaged due to too high temperature, any first heat dissipation hole and any second heat dissipation hole are arranged in a staggered mode, and after electromagnetic waves pass through the first heat dissipation holes and / or the second heat dissipation holes, the electromagnetic waves pass through the first heat dissipation holes and / or the second heat dissipation holes. Therefore, the problem that the electromagnetic shielding effect is reduced due to the fact that the holes are formed in the cover body is effectively prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic shielding, in particular to an electromagnetic shielding cover. Background Art

[0002] An electromagnetic shield is a device used to prevent electromagnetic interference. It is usually made of metal materials and can prevent the propagation of electromagnetic energy, thereby achieving electromagnetic shielding. The electromagnetic shield can prevent the influence of external electromagnetic interference, and can also prevent the influence of electromagnetic interference generated by itself on the outside world.

[0003] However, internal devices generate heat when working. Excessive temperature will affect the performance of the device or even burn it out. In addition, the single-piece shielding cover can easily cause damage to the internal devices under the high temperature of reflow soldering. At present, the effective heat dissipation solution for electromagnetic shielding covers is generally to open holes in the electromagnetic shielding cover for heat dissipation. However, after the holes are opened, the shielding effect of the electromagnetic shielding cover will be reduced, causing interference to the operation of the internal devices. Utility Model Content

[0004] The main purpose of the utility model is to provide an electromagnetic shielding cover, aiming to solve the heat dissipation problem of electronic components in the electromagnetic shielding cover.

[0005] To achieve the above-mentioned purpose, the utility model proposes an electromagnetic shielding cover, including a cover body, the cover body is connected to a shielding plate, the end face of the cover body is provided with a plurality of first heat dissipation holes, the shielding plate is provided with a plurality of second heat dissipation holes, any of the first heat dissipation holes and any of the second heat dissipation holes are staggered with each other, so as to block electromagnetic waves from entering the interior of the cover body through the first heat dissipation holes and / or the second heat dissipation holes.

[0006] In an embodiment of the present invention, the shielding plate is buckled and connected to the cover body, and forms a shielding cavity with the cover body.

[0007] In an embodiment of the present invention, a shielding net is provided in the shielding cavity.

[0008] In an embodiment of the present invention, the electromagnetic shielding cover further includes a shielding frame, and the cover body is buckled on the shielding frame.

[0009] In one embodiment of the present invention, a slot is formed on the side wall of the cover body, and a clamping piece is formed on the side wall of the shield frame. When the cover body is buckled onto the shield frame, the clamping piece is embedded in the slot.

[0010] In an embodiment of the present invention, a side wall of the cover body is provided with a notch along an outer edge of the slot.

[0011] The technical solution of the utility model transfers the heat in the cover body to the outside of the cover body through the air via the second heat dissipation holes and the second heat dissipation holes, thereby preventing the electronic components in the cover body from being affected in performance or damaged due to excessive temperature, and any first heat dissipation holes and any second heat dissipation holes are staggered with each other, and after the electromagnetic waves pass through the first heat dissipation holes and / or the second heat dissipation holes, they are blocked and absorbed by the cover body and / or the shielding plate, effectively preventing the problem of reduced electromagnetic shielding effect due to the opening of the cover body. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0013] Figure 1 This is a schematic structural diagram of an electromagnetic shielding cover according to an embodiment of the utility model;

[0014] Figure 2 It is a three-dimensional combination diagram of an electromagnetic shielding cover according to an embodiment of the present utility model.

[0015] Description of Figure Numbers:

[0016] 1. Cover body; 2. Shielding frame; 3. Shielding plate; 4. First heat dissipation hole; 5. Second heat dissipation hole; 6. Shielding net; 11. Card slot; 12. Notch; 21. Card connector.

[0017] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0020] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] In addition, in the present utility model, descriptions such as "first", "second", etc. are only used for descriptive purposes 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 meaning of "and / or" appearing in the full text is to include three parallel solutions. Taking "A and / or B as an example", it includes solution A, or solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0022] The utility model provides an electromagnetic shielding cover.

[0023] In an embodiment of the utility model, an electromagnetic shielding cover, such as Figure 1 to Figure 2 As shown, it includes a cover body 1, and the cover body 1 is connected to a shielding plate 3. In order to facilitate heat dissipation, the heat inside the cover body 1 is transferred to the outside through air. A plurality of first heat dissipation holes 4 are provided on the end surface of the cover body 1, and a plurality of second heat dissipation holes 5 are provided on the shielding plate 3. The heat generated inside the cover body 1 is transferred to the outside through the first heat dissipation holes 4 and the second heat dissipation holes 5, so as to prevent the performance of the internal electronic components from being affected or even damaged due to the excessive temperature inside the cover body 1. However, the electromagnetic shielding effect will decrease after the cover body 1 is opened, and the electromagnetic wave can pass through the cover body 1 through the first heat dissipation hole 4 and / or the second heat dissipation hole 5. Therefore, in order to isolate the electromagnetic waves as much as possible, any first heat dissipation hole 4 and any second heat dissipation hole 5 are staggered with each other. When the electromagnetic wave passes through the first heat dissipation hole 4 from the outside, the shielding plate 3 will further block the electromagnetic wave. Similarly, after the electromagnetic wave inside the cover body 1 passes through the second heat dissipation hole 5, the cover body 1 can further block and absorb the electromagnetic wave, so as to prevent the electromagnetic wave generated inside the cover body 1 from passing through the cover body 1 and affecting the external electronic components.

[0024] Preferably, the shielding plate 3 is snap-connected to the cover body 1. The snap-connected connection method can be that the shielding plate 3 is directly fixed to the side wall of the cover body 1 by abutting, or that fasteners are provided on the side wall of the cover body 1, and the shielding plate 3 is clamped to the cover body 1 through the fasteners, and the shielding plate 3 and the cover body 1 form a shielding cavity. Since the first heat dissipation hole 4 and the second heat dissipation hole 5 are staggered, when the shielding plate 3 is tightly fitted to the cover body 1, the first heat dissipation hole 4 and the second heat dissipation hole 5 will be completely closed. The main function of the shielding cavity here is to connect the first heat dissipation hole 4 and the second heat dissipation hole 5 so that the heat inside the cover body 1 is transferred to the outside. It should be noted that the shielding plate 3 needs to be in close contact with the cover body 1 to prevent the shielding plate 3 from losing its electromagnetic shielding function due to poor contact.

[0025] Furthermore, a shielding net 6 is provided in the shielding cavity to further shield the electromagnetic waves and prevent the electromagnetic waves entering the shielding cavity from continuing to pass through the first heat dissipation hole 4 and / or the second heat dissipation hole 5. The shielding net 6 is mainly a metal net woven from multiple metal wires. The material can be iron or copper, or a conductive metal alloy. The mesh size of the shielding net 6 needs to be smaller than the first heat dissipation hole 4 and the second heat dissipation hole 5.

[0026] Optionally, in order to facilitate disassembly and repair of electronic components inside the cover body 1, the electromagnetic shielding cover also includes a shielding frame 2. The cover body 1 is snapped onto the shielding frame 2, and the two are in close contact to prevent poor contact from affecting the electromagnetic shielding effect. There are many ways to connect it, which can be plug-in, snap-on, or connected by screws. There are many ways to connect, which will not be described here.

[0027] Optionally, in one embodiment, a card slot 11 is opened on the side wall of the cover body 1, and the structure of the card slot 11 is a vertical groove. A card connector 21 is provided on the side wall of the shielding frame 2, and the structure of the card connector 21 is a flange matching the groove. When the cover body 1 is buckled into the shielding frame 2, the flange is embedded in the groove, which facilitates the removal of the cover body 1.

[0028] In the embodiment of the present application, the structure of the card slot 11 can also be a plurality of buckle holes evenly arranged on the inner side of the side wall of the cover body 1, and the structure of the card connector 21 can be a plurality of convex bumps evenly arranged on the outer side of the side wall of the shielding frame 2. The positions of the buckle holes and the convex bumps correspond one to one. When the cover body 1 is buckled into the shielding frame 2, the convex bumps are embedded in the buckle holes to fix the two.

[0029] Optionally, a notch 12 is recessed on the side wall of the cover body 1 along the outer edge of the card slot 11. The shape of the notch 12 can be various shapes, such as a rectangle or a circle, which is not limited here. The notch 12 is mainly used to pry open the cover body 1, and the cover body is lifted up 1 by tweezers or other tools. The snap-on part 21 is separated from the groove 11 by the upward force, thereby disassembling the cover body 1 to facilitate the repair of the internal electronic components.

[0030] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An electromagnetic shielding cover, comprising a cover body, characterized in that: The cover body is connected to a shielding plate, a plurality of first heat dissipation holes are arranged on the end face of the cover body, and the shielding plate is provided with a plurality of second heat dissipation holes. Any of the first heat dissipation holes and any of the second heat dissipation holes are staggered with each other to block electromagnetic waves from entering the interior of the cover body through the first heat dissipation holes and / or the second heat dissipation holes.

2. An electromagnetic shielding cover as claimed in claim 1, characterized in that: The shielding plate is buckled and connected to the cover body, and forms a shielding cavity with the cover body.

3. An electromagnetic shielding cover as claimed in claim 2, characterized in that: A shielding net is arranged in the shielding cavity.

4. An electromagnetic shielding cover according to any one of claims 1 to 3, characterized in that: The electromagnetic shielding cover also includes a shielding frame, and the cover body is buckled on the shielding frame.

5. An electromagnetic shielding cover as claimed in claim 4, characterized in that: A clamping groove is formed on the side wall of the cover body, and a clamping piece is formed on the side wall of the shielding frame. When the cover body is buckled with the shielding frame, the clamping piece is embedded in the clamping groove.

6. An electromagnetic shielding cover as claimed in claim 5, characterized in that: The side wall of the cover body is concavely provided with a notch along the outer edge of the slot.

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