CN210093847U - An openable and closable composite material protective shell with electromagnetic shielding function - Google Patents

Abstract

The utility model relates to a combined material door correlation field specifically is a combined material protecting crust that can open and shut with electromagnetic shield function, aims at solving the poor technical problem of current combined material protecting crust electromagnetic shield effect. The door body is formed by a door panel and a second frame perpendicular to the door panel, the second frame is matched with the first frame, and the second frame and the first frame are attached to cover the door body and the shell; the door body includes door plant outer strata, first copper net layer and the door plant inlayer that sets gradually from the extroversion in, and the terminal surface of second frame and first frame laminating is provided with the annular recess of rectangle along this terminal surface, and the recess is embedded to be equipped with conductive adhesive tape, and conductive adhesive tape's thickness is greater than the degree of depth of recess, first copper net layer and conductive adhesive tape contact, and the second copper net layer has all been laid on the internal surface of casing and the surface of first frame.

Description

An openable and closable composite material protective shell with electromagnetic shielding function

technical field

The utility model relates to the related field of composite material doors, in particular to an openable and closable composite material protective shell with electromagnetic shielding function.

Background technique

When electronic equipment is working, it is often subject to various electromagnetic interferences (including its own interference and interference from other equipment), and will also generate electromagnetic interference to other equipment. If the electromagnetic interference exceeds the allowable value of the equipment, it will affect the normal operation of the equipment. In order to ensure the normal operation of electronic equipment, electromagnetic shielding must be considered in the structural design of electronic equipment. Shielding has two purposes: one is to limit the leakage of electromagnetic energy in the internal radiation area; the other is to prevent external radiation from entering its own area. If the external carrying space of the equipment is designed as a completely closed conductive shell, the above two shielding purposes can be better achieved. To achieve electrical conductivity, the easiest thing to think of is to use an all-metal protective shell. However, with the progress of society, the industry has higher and higher requirements for weight reduction and corrosion resistance of protective shells, and metal shells can no longer meet the requirements. People in the industry want to use composite materials with lighter weight and better corrosion resistance to make protective shells. However, because composite materials are not conductive, they cannot form a continuous conductive shielding body, resulting in poor electromagnetic shielding effect. This is also the restriction The main factors affecting the application of composite protective shells.

Utility model content

The utility model aims to solve the technical problem that the electromagnetic shielding effect of the existing composite material protective shell is poor. Therefore, the utility model proposes an openable and closable composite material protective shell with electromagnetic shielding function.

The technical scheme adopted by the utility model to solve its technical problems is:

An openable and closable composite material protective shell with electromagnetic shielding function, comprising a shell body and a door body both made of composite materials, the shell body is a rectangular parallelepiped cavity structure with one side open, and the door body is covered with a door body. The opening surface of the housing, the edge of the opening surface of the housing is convex along the opening surface to form a rectangular annular first frame, the door body is composed of a door panel and a second frame perpendicular to the door panel, the first frame is The second frame is adapted to the first frame (that is, the second frame is also a rectangular ring structure and the size is similar or equal to the first frame to ensure that the two can fit together), and the two fit together to realize the cover of the door body and the casing The door body includes a door panel outer layer, a first copper mesh layer and a door panel inner layer arranged in sequence from the outside to the inside, and the end face of the second frame and the first frame that is attached is provided with a rectangular ring along the end face. The groove is embedded with a conductive rubber strip, and the thickness of the conductive rubber strip is greater than the depth of the groove (to ensure that the conductive rubber strip can contact the second copper mesh layer when the door body is closed) , the first copper mesh layer is in contact with the conductive rubber strip, and the inner surface of the casing and the surface of the first frame are covered with a second copper mesh layer. The main innovation of the utility model lies in that: on the premise of making a protective shell with composite materials, a conductive and continuous shielding body structure is skillfully constructed through the cooperation of structures such as copper mesh, conductive rubber strips, etc., which ensures the maximum protection of composite materials The electromagnetic shielding effect of the material protective case makes the application and promotion of the composite material protective case possible.

Further, a filler layer is arranged between the first copper mesh layer of the second frame and the inner layer of the door panel, or a filler layer is arranged between the first copper mesh layer of the second frame and the outer layer of the door panel.

Further, the width of the bonding surface formed by bonding the second frame and the first frame is 15-60 mm.

Further, the edge of the first copper mesh layer is placed in the groove, and is crimped to the bottom of the groove by the conductive rubber strip.

Further, the mesh number of the first copper mesh layer and the second copper mesh layer is 50-120, and the thickness of the first copper mesh layer and the second copper mesh layer is 0.1-0.5 mm.

Further, an outer side surface of the second frame and the outer side surface of the corresponding casing are connected by hinges or snaps.

The beneficial effects of the present utility model are:

The utility model provides an openable and closable composite material protective shell with electromagnetic shielding function, which is composed of a door body and a shell, wherein the door body is provided with a first frame, the shell is provided with a second frame, the first frame and the second frame The frame is assembled to form a deep gap, the electromagnetic shielding effect is better, and the connection between the door body and the shell is more convenient; the door body is a three-layer structure, the first copper mesh layer is set in the middle, and the end face of the second frame is embedded with conductive glue The inner surface of the casing and the surface of the first frame are covered with a second copper mesh layer. When the door body is closed, the conductive rubber strip is in contact with the second copper mesh layer. The first copper mesh layer, the conductive rubber strip, and the second copper mesh layer A conductive and continuous shielding body structure is formed together, and the electromagnetic shielding effect is better, which makes the application and promotion of the composite material protective shell possible.

Description of drawings

FIG. 1 is a schematic cross-sectional structure diagram of a protective shell of the present invention.

Detailed ways

Referring to FIG. 1 , an openable and closable composite material protective shell with electromagnetic shielding function of the present invention includes a shell 1 and a door body 2 both made of composite materials, and the shell 1 is a rectangular parallelepiped with one side open. Cavity structure, the door body 2 is covered with the opening surface of the housing 1, the edge of the opening surface of the housing 1 protrudes along the opening surface to form a rectangular ring-shaped first frame 11, the door body 2 is composed of The door panel 21 and the second frame 22 perpendicular to the door panel 21 are formed. The second frame 22 is adapted to the first frame 11 and the two fit together to realize the cover of the door body 2 and the housing 1; the door body 2. It includes the door panel outer layer 23, the first copper mesh layer 24 and the door panel inner layer 25, which are arranged in sequence from the outside to the inside. The groove is embedded with a conductive rubber strip 3, the thickness of the conductive rubber strip 3 is greater than the depth of the groove, and the first copper mesh layer 24 is in contact with the conductive rubber strip 3. The inner surface of the casing 1 and the surface of the first frame 11 are both covered with a second copper mesh layer 4 . Here, the connection between the door body 2 and the housing 1 may adopt a connection structure commonly used in the art, such as hinge hinge, snap connection and the like. When the door body 2 is covered on the casing 1, the first copper mesh layer 24 is in contact with the conductive rubber strip 3, and the conductive rubber strip 3 is in contact with the second copper mesh layer 4, so that the first copper mesh layer 24, the conductive rubber strip 3. The second copper mesh layer 4 together forms a closed shield structure, which ensures the electrical continuity of the shield, and the electromagnetic shielding effect is better. Here, the thickness of the conductive rubber strip 3 is greater than the depth of the groove, which is to ensure that when the door body 2 is covered on the casing 1, the conductive rubber strip 3 can be in contact with the second copper mesh layer 4 on the surface of the first frame 11, The conductive continuity of the shielding body is ensured, and at the same time, the soft sealing between the door body 2 and the casing 1 is also realized, which further improves the shielding effect.

Further, a filler layer 26 is provided between the first copper mesh layer 24 of the second frame 22 and the inner layer 25 of the door panel, or between the first copper mesh layer 24 of the second frame 22 and the outer layer 23 of the door panel There is a filler layer 26 . The purpose of the filler layer 26 is to increase the width of the second frame 22 without increasing the material used for the door panel, thereby increasing the contact area between the first frame 11 and the second frame 22, and the width of the bonding surface. A deep gap structure is formed to further improve the electromagnetic shielding effect. The filler here can be filled with glue or the like. Specifically, the width of the bonding surface formed by bonding the second frame 22 and the first frame 11 is 15-60 mm, which can be 15 mm or 25 mm or 35 mm or 45 mm or 60 mm.

As a preferred way for the conductive rubber strip 3 to contact the first copper mesh layer 24 , the edge of the first copper mesh layer 24 is placed in the groove, and is crimped to the groove by the conductive rubber strip 3 bottom of the groove. The contact is tighter and more reliable.

Further, the mesh number of the first copper mesh layer 24 and the second copper mesh layer 4 is 50-120, the thickness of the first copper mesh layer 24 and the second copper mesh layer 4 is 0.1-0.5mm, and the mesh Too much mesh will affect the shielding effect, and too small mesh will increase the cost of the copper mesh. The above size range is the preferred mesh range obtained after calculation. Specifically, the meshes of the first copper mesh layer 24 and the second copper mesh layer 4 may be 50 or 70 or 100 or 120, and the thicknesses of the first copper mesh layer 24 and the second copper mesh layer 4 may be 0.1 mm or 0.3 mm. mm or 0.5mm.

As a preferred connection structure between the door body 2 and the housing 1 , an outer side surface of the second frame 22 is connected with the corresponding outer side surface of the housing 1 through hinges or snaps, and the door body 2 is reliably connected. On the basis of , it is ensured that the first frame 11 and the second frame 22 can be closely attached.

The above specific structure and size data are specific descriptions of the preferred embodiments of the present utility model, but the invention of the present utility model is not limited to the described embodiments, and those skilled in the art can also Various equivalent modifications or substitutions can be made, and these equivalent modifications or substitutions are all included within the scope defined by the claims of the present application.

Claims (6)

1. An openable and closable composite material protective casing with electromagnetic shielding function, comprising a casing (1) and a door body (2) both made of composite materials, the casing (1) being a rectangular parallelepiped with an open side In the cavity structure, the door body (2) is covered with the opening surface of the housing (1), and it is characterized in that: the edge of the opening surface of the housing (1) protrudes along the opening surface to form a rectangular annular first A frame (11), the door body (2) is composed of a door panel (21) and a second frame (22) perpendicular to the door panel (21), the second frame (22) and the first frame (11) ) is adapted and the two fit together to realize the cover of the door body (2) and the housing (1); the door body (2) includes a door panel outer layer (23) and a first copper mesh layer arranged in sequence from the outside to the inside. (24) and the inner layer of the door panel (25), the end face of the second frame (22) and the first frame (11) is provided with a rectangular annular groove along the end face, the groove is embedded A conductive rubber strip (3) is installed, the thickness of the conductive rubber strip (3) is greater than the depth of the groove, the first copper mesh layer (24) is in contact with the conductive rubber strip (3), and the A second copper mesh layer (4) is laid on the inner surface of the housing (1) and the surface of the first frame (11). 2 . The openable and closable composite material protective case with electromagnetic shielding function according to claim 1 , wherein the first copper mesh layer ( 24 ) of the second frame ( 22 ) and the inner layer of the door panel A filler layer (26) is arranged between (25), or a filler layer (26) is arranged between the first copper mesh layer (24) of the second frame (22) and the outer layer (23) of the door panel. 3 . The openable and closable composite material protective case with electromagnetic shielding function according to claim 2 , characterized in that: the second frame ( 22 ) and the first frame ( 11 ) are bonded together to form a fit. 4 . The width of the face is 15-60mm. The openable and closable composite material protective case with electromagnetic shielding function according to claim 1, characterized in that: the edge of the first copper mesh layer (24) is placed in the groove, and is crimped to the groove bottom of the groove by the conductive rubber strip (3). The openable and closable composite material protective case with electromagnetic shielding function according to claim 1, characterized in that: the purpose of the first copper mesh layer (24) and the second copper mesh layer (4) is The number is 50-120, and the thicknesses of the first copper mesh layer (24) and the second copper mesh layer (4) are 0.1-0.5 mm. 6. The openable and closable composite material protective case with electromagnetic shielding function according to any one of claims 1-5, characterized in that: an outer side surface of the second frame (22) and a corresponding case The outer sides of the body (1) are connected by hinges or snaps.

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