Electromagnetic interference shielding mechanism

Abstract

The utility model discloses an electromagnetic interference shielding mechanism, comprising a circuit board; the shielding cover is arranged on the circuit board, a plurality of elastic sheets are arranged on the side, close to the circuit board, of the shielding cover, one part of each elastic sheet is connected with the circuit board, and a plurality of positioning holes are formed in the side, away from the circuit board, of the shielding cover; the first shell is arranged on the side, away from the circuit board, of the shielding cover, the first shell is provided with a connecting piece, and the connecting piece is in interference fit with the positioning hole; the second shell is arranged on the side, away from the shielding cover, of the circuit board, and the second shell is connected with the first shell. According to the utility model, the connection process of the shielding case and the circuit board can be simplified, and cost is reduced.

Description

Technical Field

[0001] The utility model relates to the electronic field, in particular to an electromagnetic interference shielding mechanism. Background Art

[0002] A shielding cover is an alloy metal cover. Products that generally use wireless communications (such as LCU Light control unit) usually have a shielding cover designed on the circuit board to isolate EMI (Electromagnetic Interference).

[0003] At present, the connection between the shielding cover and the circuit board is mainly achieved by fixing a certain number of shielding cover clips on the circuit board, and then the shielding cover cooperates with the clips and covers the circuit board. It is necessary to fix the shielding cover clips on the circuit board and design the shielding cover to match the shielding cover clips. The process is complicated. When there are fewer interference sources on the circuit board, it means that there is less space for installing the shielding cover clips, which is not convenient to operate. At the same time, the cost of the shielding cover clips is high. Utility Model Content

[0004] The utility model aims to solve the problem that the connection process between the shielding cover and the circuit board is complicated and costly. The utility model provides an electromagnetic interference shielding mechanism, which can simplify the connection process between the shielding cover and the circuit board and reduce the cost.

[0005] In order to solve the above technical problems, the embodiment of the utility model discloses an electromagnetic interference shielding mechanism, comprising:

[0006] Circuit boards;

[0007] A shielding cover, the shielding cover is arranged on the circuit board, a plurality of elastic sheets are arranged on a side of the shielding cover close to the circuit board, a portion of each of the elastic sheets is connected to the circuit board, and a plurality of positioning holes are opened on a side of the shielding cover away from the circuit board;

[0008] A first shell, the first shell is arranged on a side of the shielding cover away from the circuit board, the first shell is provided with a connecting piece, and the connecting piece is interference-fitted with the positioning hole;

[0009] The second shell is arranged on a side of the circuit board away from the shielding cover, and the second shell is connected to the first shell.

[0010] By adopting the above technical solution, the electromagnetic interference shielding mechanism needs to set a positioning hole on the shielding cover, and rely on the interference fit between the positioning hole and the connecting piece of the first shell to make a part of the elastic sheet in close contact with the circuit board, simplifying the connection process between the shielding cover and the circuit board and reducing the manufacturing cost. That is to say, when the first shell is installed on the shielding cover, the interference fit between the positioning hole and the connecting piece will exert pressure on the shielding cover to deform the elastic sheet, and a part of the elastic sheet will be in close contact with the circuit board to solve the EMC (Electro Magnetic Compatibility) problem; at the same time, after the positioning hole and the connecting piece are connected, the shielding cover can be limited to prevent the shielding cover from shaking, making the installation simple, and then the first shell is connected to the second shell to ensure that a part of the elastic sheet can continue to be in close contact with the circuit board.

[0011] In other words, the electromagnetic interference shielding mechanism no longer requires a shielding cover clip, and there is no need to design the position of the shielding cover clip on the circuit board, that is, there is no need to modify the circuit board, which simplifies the process. It only needs to install the shielding cover on the first shell for assembly. At the same time, the number of parts is reduced, reducing the cost of purchasing the shielding cover clip. At the same time, high-precision positioning holes are designed on the shielding cover to ensure that the installation position of the shielding cover is accurate.

[0012] According to another specific embodiment of the present utility model, an embodiment of the present utility model discloses an electromagnetic interference shielding mechanism, wherein a protrusion is provided on a side of the elastic sheet close to the circuit board, and the protrusion abuts against the circuit board.

[0013] According to another specific embodiment of the utility model, the embodiment of the utility model discloses an electromagnetic interference shielding mechanism, a plurality of positioning members are provided on a side of the first shell close to the shielding cover, the plurality of positioning members are arranged at intervals along the outer side of the connecting member, and the positioning members abut against the shielding cover.

[0014] By adopting the above technical solution, multiple positioning parts are set so that when the positioning hole and the connecting part are interference fit, the pressure applied to the shielding cover is evenly distributed on the entire shielding cover, ensuring that each elastic sheet is evenly stressed so that a part of each elastic sheet can be in close contact with the circuit board.

[0015] According to another specific embodiment of the present utility model, an electromagnetic interference shielding mechanism is disclosed in the embodiment of the present utility model, wherein the positioning hole has a through hole extending outward.

[0016] By adopting the above technical solution and setting the through hole extending outward, it is not necessary to apply excessive force when inserting the connector into the positioning hole, thereby preventing excessive force from being transmitted to the shielding cover, thereby damaging the circuit board.

[0017] According to another specific embodiment of the present utility model, an electromagnetic interference shielding mechanism is disclosed, wherein the positioning hole is in a cross shape.

[0018] According to another specific embodiment of the present utility model, an embodiment of the present utility model discloses an electromagnetic interference shielding mechanism, wherein the positioning holes are symmetrically arranged.

[0019] By adopting the above technical solution, the positioning holes are symmetrically arranged, which makes it easier to form during processing.

[0020] According to another specific embodiment of the present invention, an electromagnetic interference shielding mechanism is disclosed, wherein the positioning member includes a tip portion, and the tip portion abuts against the shielding cover.

[0021] By adopting the above technical solution, the tip portion is easy to deform. When the tip portion transmits the force that connects the connector to the positioning hole, the tip portion is deformed by the reaction force of the shielding cover, thereby reducing the force on the shielding cover.

[0022] According to another specific embodiment of the present utility model, an embodiment of the present utility model discloses an electromagnetic interference shielding mechanism, and the number of the positioning holes is two.

[0023] By adopting the above technical solution and setting two positioning holes, the connection between the first shell and the shielding cover is more secure, and the installation position of the shielding cover is more accurately positioned.

[0024] According to another specific embodiment of the present utility model, an embodiment of the present utility model discloses an electromagnetic interference shielding mechanism, wherein the number of the positioning members is six.

[0025] According to another specific embodiment of the present utility model, an embodiment of the present utility model discloses an electromagnetic interference shielding mechanism, wherein the shielding cover comprises a cavity, wherein the cavity and the circuit board enclose a shielding space, and the shielding space is used to accommodate electronic components. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A three-dimensional view of an LCU equipped with the electromagnetic shielding interference mechanism provided by an embodiment of the utility model is shown. Figure 1 ;

[0027] Figure 2 A three-dimensional view of an LCU equipped with the electromagnetic shielding interference mechanism provided by an embodiment of the utility model is shown. Figure 2 ;

[0028] Figure 3 A cross-sectional view of an LCU equipped with the electromagnetic shielding interference mechanism provided by an embodiment of the utility model is shown;

[0029] Figure 4 A three-dimensional diagram of a first housing provided by an embodiment of the utility model is shown;

[0030] Figure 5 Show Figure 3 The enlarged view of the A area is also a three-dimensional view of the electromagnetic shielding interference mechanism provided by the embodiment of the utility model, wherein the connector of the first shell is not shown and only a part of the first shell is shown;

[0031] Figure 6 A cross-sectional view showing an electromagnetic shielding interference mechanism provided by an embodiment of the utility model;

[0032] Figure 7 A three-dimensional diagram of a shielding cover provided by an embodiment of the utility model is shown;

[0033] Figure 8 A top view of a shielding cover provided by an embodiment of the utility model is shown;

[0034] Fig. 9 A three-dimensional view showing a portion of a first shell provided by an embodiment of the utility model.

[0035] Figure numerals: In the figure, 1, circuit board; 2, shielding cover; 20, cavity; 21, elastic sheet; 210, inclined wall; 211, horizontal wall; 212, circular protrusion; 23, positioning hole; 24, through hole; 3, first shell; 30, connector; 31, positioning member; 32, tip; 33, connector; 4, second shell. DETAILED DESCRIPTION

[0036] The following is an explanation of the implementation of the present invention by specific specific embodiments. Those skilled in the art can easily understand other advantages and functions of the present invention from the contents disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiment, this does not mean that the features of this utility model are limited to this implementation. On the contrary, the purpose of introducing the utility model in conjunction with the implementation is to cover other options or modifications that may be extended based on the claims of the present invention. In order to provide a deep understanding of the present invention, the following description will include many specific details. The present invention can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present invention, some specific details will be omitted in the description. It should be noted that, in the absence of conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0037] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0038] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0039] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0040] In the description of this embodiment, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connected", and "connected" should be understood in a broad sense, for example, it 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances.

[0041] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0042] The present application provides an electromagnetic interference shielding mechanism that can be applied to any device that requires electromagnetic interference shielding, such as products that use wireless communications. The embodiments of the present application are described using the application to LCU as an example.

[0043] For example, reference Figures 1 to 5 The electromagnetic interference shielding mechanism includes: a circuit board 1, a shielding cover 2, a first shell 3 and a second shell 4. A plurality of electronic components (not shown) are arranged on the circuit board 1. The circuit board 1 is rectangular, but not limited to this, and may also be square, polygonal or other irregular shapes.

[0044] refer to Figure 5 ,in Figure 5 Shown Figure 3 The enlarged view of the A area in the middle hides the connector 33 (such as Figure 4 The connector 33 is used to connect external devices. Figure 5 Main components of the electromagnetic interference shielding mechanism provided in the embodiment of the present application are mainly shown.

[0045] For example, along the first direction (i.e. Figure 5In the X direction shown in the figure, a shielding cover 2 is provided above the circuit board 1, and a second shell 4 is provided below the circuit board 1, that is, on the side of the circuit board 1 away from the shielding cover 2. Along the first direction, a first shell 3 is provided above the shielding cover 2, that is, on the side of the shielding cover 2 away from the circuit board 1. The first shell 3 and the second shell 4 are connected by multiple bolts, but are not limited to this. As long as the first shell 3 and the second shell 4 can be connected together, they are all within the protection scope of the present application. The connection between the first shell 3 and the second shell 4 ensures that the shielding cover 2 will not move up and down along the first direction.

[0046] Combine the following Figures 6 to 8 , the specific structure of the shielding cover 2 is introduced in detail.

[0047] For example, reference Figure 6 and Figure 8 The shielding cover 2 includes a top, a left side, a right side, a front side and a back side. The bottom of the shielding cover 2 is an open end and faces the circuit board 1. The top, the left side, the right side, the front side and the back side together form a cavity 20. The cavity 20 and the circuit board 1 form a shielding space, and the electronic components are accommodated in the shielding space.

[0048] For example, reference Figures 6 to 8 The shielding cover 2 is provided with a plurality of elastic sheets 21 on one side close to the circuit board 1. Specifically, four elastic sheets 21 are provided on the left side of the shielding cover 2, four elastic sheets 21 are provided on the right side of the shielding cover 2, nine elastic sheets 21 are provided in front of the shielding cover 2, and nine elastic sheets 21 are provided on the back of the shielding cover 2. Each elastic sheet 21 includes an elastic sheet 21 that is inclined toward the cavity 20 (i.e., along the Figure 7 The inclined wall 210 (in the direction a) and the horizontal wall 211 facing the circuit board 1 are connected to each other, and each horizontal wall 211 protrudes toward the circuit board 1 to form a circular protrusion 212, which abuts against the circuit board 1.

[0049] It should be noted that the embodiment of the present application does not limit the number of elastic sheets 21, which can be 26 as shown in the embodiment of the present application, or 20, 25, 30, etc. The specific number can be selected according to actual needs.

[0050] For example, continue to refer to Figures 6 to 8 Two positioning holes 23 are formed on the side of the shielding cover 2 away from the circuit board 1. The positioning holes 23 penetrate the shielding cover 2 along the first direction. That is, along the first direction, two positioning holes 23 are formed on the top of the shielding cover 2. The two positioning holes 23 are symmetrically arranged to facilitate molding during processing.

[0051] Exemplarily, each positioning hole 23 has a through hole 24 extending outward, and the two positioning holes 23 are both cross-shaped. The through hole 24 extending outward is provided so that when the connector 30 is inserted into the positioning hole 23, there is no need to apply excessive force, thereby preventing excessive force from being transmitted to the shielding cover 2, thereby causing damage to the circuit board 1.

[0052] It should be noted that the embodiment of the present application does not limit the specific number and shape of the positioning holes 23 , which may be two cross-shaped positioning holes 23 as shown in the embodiment of the present application, or three asterisk-shaped positioning holes 23 .

[0053] For example, in combination Fig. 9 The first shell 3 is provided with a connecting member 30 extending along the first direction and toward the shielding cover 2, and the connecting member 30 is interference-fitted with the positioning hole 23; along the first direction (ie Figure 6 In the X direction shown in the figure, six positioning members 31 are provided on one side of the first shell 3 close to the shielding cover 2 (that is, the inner surface of the first shell 3), and the six positioning members 31 are arranged at intervals along the outer side of the connecting member 30. The positioning member 31 includes a tip portion 32, which is triangular and abuts against the shielding cover 2.

[0054] Exemplarily, six positioning members 31 are provided, so that when the positioning hole 23 and the connector 30 are interference fit, the pressure applied to the shielding cover 2 can be evenly distributed on the entire shielding cover 2, ensuring that each elastic sheet 21 is evenly stressed and can be in close contact with the circuit board 1. The triangular tip 32 is easy to deform. When the tip 32 transmits the force that connects the connector 30 with the positioning hole 23, the tip 32 is deformed by the reaction force of the shielding cover 2, thereby reducing the force applied to the shielding cover 2.

[0055] It should be noted that the embodiment of the present application does not limit the number of positioning members 31, which can be 6 as shown in the embodiment of the present application, or 4, 7, 8, 10, etc. The specific number can be selected according to actual needs.

[0056] In general, the electromagnetic interference shielding mechanism needs to set a positioning hole 23 on the shielding cover 2, and rely on the interference fit between the positioning hole 23 and the connecting piece 30 of the first shell 3 to make a part of the elastic sheet 21 (i.e., the circular protrusion 212) closely contact with the circuit board 1, thereby simplifying the connection process between the shielding cover 2 and the circuit board 1 and reducing the manufacturing cost.

[0057] That is to say, when the first shell 3 is installed on the shielding cover 2, the interference fit between the positioning hole 23 and the connecting piece 30 will exert pressure on the shielding cover 2 to deform the elastic sheet 21, and a part of the elastic sheet 21 (i.e., the circular protrusion 212) is in close contact with the circuit board 1 to solve the EMC (Electro Magnetic Compatibility) problem; at the same time, after the positioning hole 23 and the connecting piece 30 are connected, the shielding cover 2 can be limited to prevent the shielding cover 2 from shaking left and right, making the installation simple, and then the first shell 3 is connected to the second shell 4 to ensure that a part of the elastic sheet 21 can continue to be in close contact with the circuit board 1.

[0058] That is to say, the electromagnetic interference shielding mechanism no longer needs the shielding cover 2 clip, and there is no need to design the position of the shielding cover 2 clip on the circuit board 1, that is, there is no need to modify the circuit board 1, which simplifies the process and reduces the cost of purchasing the shielding cover 2 clip. The high-precision positioning hole 23 replaces the previous design of the shielding cover 2 clip, and sufficient circular protrusions 212 are designed to contact the circuit board, thereby reducing parts, reducing costs and simplifying the process on the basis of ensuring the shielding effect of the product.

[0059] Although the present invention has been illustrated and described with reference to certain preferred embodiments of the present invention, it should be understood by those skilled in the art that the above contents are further detailed descriptions of the present invention in combination with specific embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. Those skilled in the art may make various changes in form and details, including making several simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. An electromagnetic interference shielding mechanism, characterized in that: include: Circuit boards; A shielding cover, the shielding cover is arranged on the circuit board, a plurality of elastic sheets are arranged on a side of the shielding cover close to the circuit board, a portion of each of the elastic sheets is connected to the circuit board, and a plurality of positioning holes are opened on a side of the shielding cover away from the circuit board; A first shell, the first shell is arranged on a side of the shielding cover away from the circuit board, the first shell is provided with a connecting piece, and the connecting piece is interference-fitted with the positioning hole; The second shell is arranged on a side of the circuit board away from the shielding cover, and the second shell is connected to the first shell.

2. The electromagnetic interference shielding mechanism according to claim 1, characterized in that: A protrusion is provided on one side of the elastic sheet close to the circuit board, and the protrusion abuts against the circuit board.

3. The electromagnetic interference shielding mechanism according to claim 1, characterized in that: A plurality of positioning members are provided on a side of the first shell body close to the shielding cover. The plurality of positioning members are arranged at intervals along the outer side of the connecting member, and the positioning members are in contact with the shielding cover.

4. The electromagnetic interference shielding mechanism according to claim 1, characterized in that: The positioning hole has a through hole extending outward.

5. The electromagnetic interference shielding mechanism according to claim 4, characterized in that: The positioning hole is cross-shaped.

6. The electromagnetic interference shielding mechanism according to claim 1, characterized in that: The positioning holes are symmetrically arranged.

7. The electromagnetic interference shielding mechanism according to claim 3, characterized in that: The positioning member includes a tip portion, and the tip portion abuts against the shielding cover.

8. The electromagnetic interference shielding mechanism according to claim 6, characterized in that: The number of the positioning holes is two.

9. The electromagnetic interference shielding mechanism according to claim 7, characterized in that: The number of the positioning members is six.

10. The electromagnetic interference shielding mechanism according to claim 1, characterized in that: The shielding cover comprises a cavity, and the cavity and the circuit board enclose a shielding space, and the shielding space is used to accommodate electronic components.

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