Optical module electromagnetic shielding structure and optical module

Abstract

The utility model relates to the technical field of optical communication, in particular to an optical module electromagnetic shielding structure and an optical module, the optical module electromagnetic shielding structure is suitable for the optical module with a plastic ferrule, the optical module electromagnetic shielding structure comprises an electromagnetic shielding plate, the electromagnetic shielding plate is provided with a ferrule via hole for the plastic ferrule to pass through, and the electromagnetic shielding plate is formed by splicing a first electromagnetic shielding baffle and a second electromagnetic shielding baffle. The electromagnetic shielding plate is made of a conductive silicone rubber material. According to the utility model, EMI shielding can be completed by assembling the first electromagnetic shielding baffle plate and the second electromagnetic shielding baffle plate, the assembly is simple, the problem of large assembly difficulty can be effectively solved, and compared with a metal EMI baffle plate, the electromagnetic shielding plate made of the conductive silicone rubber material has a better shielding effect and a better shielding effect. And due to the soft characteristic of the electromagnetic shielding plate made of the conductive silicone rubber material, the electromagnetic shielding plate can be more easily contacted with the structural member upper cover plate and the structural member base to form a shielding cavity, so that the problem of EMI leakage caused by the fact that a metal shielding cavity cannot be formed by the metal EMI baffle plate, the base and the upper cover is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of optical communication, and in particular to an optical module electromagnetic shielding structure and an optical module. Background Art

[0002] As the speed of optical module products increases, the wavelength gradually becomes smaller. Small wavelengths are easier to pass through small gaps. However, since plastic ferrules are not metal, they cannot form a complete metal cavity to achieve effective shielding.

[0003] The Chinese invention patent with the publication number CN114924360A discloses an electromagnetic shielding component, a base and an optical module, which provides an optical module including an electromagnetic shielding component, the electromagnetic shielding component includes an optical port end provided at the optical port of the optical module base and an EMI baffle installed on the optical port end, the EMI baffle has a first through hole for the optical fiber to pass through, and the optical port end is provided with a second opening corresponding to the first opening, and the optical fiber passes through the second opening and the first opening in sequence. The prior art requires the optical fiber to be straightened for effective assembly for the assembly of loose fibers, which is difficult to assemble; in addition, the EMI baffle of the prior art is made of conductive metal material, the edge of the sheet is sharp and hard, and it is very easy to scratch the optical fiber, causing product failure, and the material makes it difficult for the base and the upper cover to fully contact to form a metal shielding cavity, and once there is a gap, there will be EMI leakage problems. Utility Model Content

[0004] The purpose of the utility model is to provide an electromagnetic shielding structure and an optical module for an optical module. By utilizing an electromagnetic shielding plate, EMI shielding can be completed by assembling a first electromagnetic shielding baffle and a second electromagnetic shielding baffle while minimizing the increase in processes and procedures. The assembly is simple, and the problem of difficulty in assembly in the background technology can be effectively solved. In addition, the electromagnetic shielding plate made of conductive silicone rubber has a better shielding effect than that of a metal EMI baffle. Due to the soft nature of the electromagnetic shielding plate made of conductive silicone rubber, it is easier to contact with an upper cover plate of a structural member and a base of a structural member to form a shielding cavity, so as to solve the problem that the metal EMI baffle, base and upper cover cannot form a metal shielding cavity, resulting in EMI leakage.

[0005] The embodiment of the utility model is realized through the following technical scheme: an optical module electromagnetic shielding structure, suitable for an optical module with a plastic plug, including an electromagnetic shielding plate, the electromagnetic shielding plate is provided with a plug through hole for the plastic plug to pass through, the electromagnetic shielding plate is formed by splicing a first electromagnetic shielding baffle and a second electromagnetic shielding baffle, and the electromagnetic shielding plate is made of conductive silicone rubber material.

[0006] According to a preferred embodiment, "U"-shaped grooves are respectively provided on the first electromagnetic shielding baffle and the second electromagnetic shielding baffle. After the first electromagnetic shielding baffle and the second electromagnetic shielding baffle are spliced, the "U"-shaped groove of the first electromagnetic shielding baffle and the "U"-shaped groove of the second electromagnetic shielding baffle are butted to form a core via.

[0007] According to a preferred embodiment, the first electromagnetic shielding baffle and the second electromagnetic shielding baffle are arranged in a mirror-symmetrical manner along the joint.

[0008] The utility model also provides an optical module, including a structural member upper cover plate and a structural member base, and also including a PCB and a COB lens body arranged on the structural member base, the COB lens body being arranged on the lower end surface of the front end of the PCB, a plastic plug being arranged at the front end of the COB lens body, a protrusion being arranged on the plastic plug, and the optical module electromagnetic shielding structure as described above being installed at the rear end of the protrusion of the plastic plug.

[0009] According to a preferred embodiment, it also includes an optical connector arranged at the front end of the structural member base, and a sinking groove is opened at the rear end of the optical connector along the vertical direction.

[0010] According to a preferred embodiment, the sinking groove is adapted to the outer shape of the electromagnetic shielding plate, and the electromagnetic shielding plate is accommodated in the sinking groove.

[0011] The electromagnetic shielding structure of the optical module and the technical solution of the optical module provided by the embodiment of the utility model have at least the following advantages and beneficial effects: the utility model utilizes the electromagnetic shielding plate to complete the EMI shielding by assembling the first electromagnetic shielding baffle and the second electromagnetic shielding baffle under the premise of minimizing the increase in processes and procedures. The assembly is simple and can effectively solve the problem of difficult assembly. In addition, the electromagnetic shielding plate made of conductive silicone rubber has better shielding effect than the metal EMI baffle. Due to the soft characteristics of the electromagnetic shielding plate made of conductive silicone rubber, it is easier to contact with the upper cover plate and the base of the structural member to form a shielding cavity, so as to solve the problem that the metal EMI baffle, base and upper cover cannot form a metal shielding cavity, and there is EMI leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A schematic diagram of the electromagnetic shielding structure of an optical module and the structure of an optical module provided in Example 1 of the utility model;

[0013] Figure 2 A top view of the base of the structural member provided in Example 1 of the utility model;

[0014] Icons: 1-first electromagnetic shielding baffle, 2-second electromagnetic shielding baffle, 3-"U"-shaped groove, 4-structural upper cover plate, 5-structural base, 6-PCB, 7-COB lens body, 8-plastic ferrule, 9-protrusion, 10-optical connector, 11-sinking groove. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0016] Example 1

[0017] See also Figure 1 As shown, Figure 1 The electromagnetic shielding structure of the optical module and the schematic diagram of the structure of the optical module provided by the embodiment of the utility model are further specifically applicable to the optical module with a plastic plug core, so as to solve the problem that the electromagnetic shielding structural parts of the existing metal EMI baffle, base and upper cover cannot form a metal shielding cavity for the plastic plug core 8, and there is EMI leakage.

[0018] The electromagnetic shielding structure of the optical module includes an electromagnetic shielding plate, which is made of conductive silicone rubber material and can form a grounding loop, greatly improving the electromagnetic shielding capability; the electromagnetic shielding plate is provided with a core via hole for the plastic core 8 to pass through. After the optical fiber comes from the PCB6 board, it is first connected to the plastic core 8, and then the plastic core 8 passes through the core via hole of the electromagnetic shielding plate.

[0019] In some embodiments of the utility model, the electromagnetic shielding plate is formed by splicing a first electromagnetic shielding baffle 1 and a second electromagnetic shielding baffle 2; specifically, the first electromagnetic shielding baffle 1 and the second electromagnetic shielding baffle 2 are respectively provided with a "U"-shaped groove 3, and after the first electromagnetic shielding baffle 1 and the second electromagnetic shielding baffle 2 are spliced, the "U"-shaped groove 3 of the first electromagnetic shielding baffle 1 and the "U"-shaped groove 3 of the second electromagnetic shielding baffle 2 are butt-jointed to form a core via; in a preferred embodiment, the first electromagnetic shielding baffle 1 and the second electromagnetic shielding baffle 2 are mirror-symmetrically arranged along the splicing point, and the "U"-shaped groove 3 is a semicircular groove.

[0020] The embodiment of the utility model also provides an optical module, which includes a structural upper cover plate 4, a structural base 5, a PCB 6 arranged on the structural base 5, and a COB lens body 7. The COB lens body 7 is arranged on the lower end surface of the front end of the PCB 6 and covers the light emitting element and the light receiving element. The COB lens body 7 is used to transmit the signal light of the light emitting element and the light receiving element, and change the propagation direction of the signal light of the light emitting element and the light receiving element. A plastic ferrule 8 is provided at the front end of the COB lens body 7, one end of the optical fiber is connected to the COB lens body 7, and the other end is connected to the plastic ferrule 8; a protrusion 9 is provided on the plastic ferrule 8, and the rear end of the protrusion 9 of the plastic ferrule 8 is installed with the optical module electromagnetic shielding structure described above.

[0021] Further, see Figure 2 As shown, an optical connector 10 is provided at the front end of the structural member base 5 , and a sinking groove 11 is vertically opened at the rear end of the optical connector 10 . The sinking groove 11 is adapted to the shape of the electromagnetic shielding plate, and the electromagnetic shielding plate is accommodated in the sinking groove 11 .

[0022] To sum up, the electromagnetic shielding structure of the optical module and the technical solution of the optical module provided by the embodiment of the utility model have at least the following advantages and beneficial effects: the utility model utilizes the electromagnetic shielding plate to complete the EMI shielding by assembling the first electromagnetic shielding baffle 1 and the second electromagnetic shielding baffle 2 under the premise of minimizing the increase in processes and procedures. The assembly is simple and can effectively solve the problem of difficult assembly. In addition, the electromagnetic shielding plate made of conductive silicone rubber has better shielding effect than the metal EMI baffle. Due to the soft characteristics of the electromagnetic shielding plate made of conductive silicone rubber, it is easier to contact with the structural upper cover plate 4 and the structural base 5 to form a shielding cavity, so as to solve the problem that the metal EMI baffle, base and upper cover cannot form a metal shielding cavity, and there is EMI leakage.

[0023] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An optical module electromagnetic shielding structure, applicable to an optical module with a plastic ferrule, characterized in that: It comprises an electromagnetic shielding plate, the electromagnetic shielding plate is provided with an insert through hole for a plastic insert (8) to pass through, the electromagnetic shielding plate is formed by splicing a first electromagnetic shielding baffle plate (1) and a second electromagnetic shielding baffle plate (2), and the electromagnetic shielding plate is made of conductive silicone rubber material.

2. The electromagnetic shielding structure of the optical module according to claim 1, characterized in that: The first electromagnetic shielding baffle (1) and the second electromagnetic shielding baffle (2) are respectively provided with a "U"-shaped groove (3); after the first electromagnetic shielding baffle (1) and the second electromagnetic shielding baffle (2) are spliced ​​together, the "U"-shaped groove (3) of the first electromagnetic shielding baffle (1) and the "U"-shaped groove (3) of the second electromagnetic shielding baffle (2) are butted together to form a core insertion hole.

3. The electromagnetic shielding structure of the optical module according to claim 2, characterized in that: The first electromagnetic shielding baffle (1) and the second electromagnetic shielding baffle (2) are arranged in a mirror-symmetrical manner along the joint.

4. An optical module, comprising a structural member upper cover plate (4) and a structural member base (5), characterized in that: The structure also comprises a PCB (6) and a COB lens body (7) arranged on the structural component base (5); the COB lens body (7) is arranged on the lower end surface of the front end of the PCB (6); a plastic insert (8) is arranged at the front end of the COB lens body (7); a protrusion (9) is arranged on the plastic insert (8); and the electromagnetic shielding structure of the optical module according to any one of claims 1 to 3 is installed at the rear end of the protrusion (9) of the plastic insert (8).

5. The optical module according to claim 4, characterized in that: It also comprises an optical connector (10) arranged at the front end of the structural component base (5), and a sinking groove (11) is provided at the rear end of the optical connector (10) in the vertical direction.

6. The optical module according to claim 5, characterized in that: The sinking groove (11) is adapted to the outer shape of the electromagnetic shielding plate, and the electromagnetic shielding plate is accommodated in the sinking groove (11).

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