An optical module structure resistant to electromagnetic interference

Abstract

The present invention discloses an optical module structure that resists electromagnetic interference, including an upper cover, a lower shell, an optical receiving component, an optical transmitting component, a circuit board, an optical port conductive rubber for sealing the optical port, and a shell conductive rubber for sealing the shell, the optical port conductive rubber is inserted into a slot provided on the lower shell, and the sockets of the optical receiving component and the optical transmitting component are both passed through through holes on the optical port conductive rubber, and the shell conductive rubber covers the junction of the long sides of the upper cover and the lower shell; the upper cover is connected to the lower shell, and squeezes the optical port conductive rubber and the shell conductive rubber. Advantages: In this structure, conductive rubber of corresponding structure is arranged between the upper cover and the lower shell and at the optical port, and a sealing structure is formed under the pressure of the shell fixing bolts, thereby achieving the effect of resisting electromagnetic interference; this structure, under the premise of achieving anti-electromagnetic interference, has the advantages of simple structure, convenient installation and operation, and can reduce costs.

Description

Technical Field

[0001] The invention relates to an optical module structure that resists electromagnetic interference. Background Art

[0002] With the rapid development of the optical communication industry, the speed of optical modules is getting higher and higher, and the shielding of high-frequency signals places higher and higher requirements on the sealing of the optical module housing structure.

[0003] Traditional optical modules generally use blocking metal sheets or gap filling with conductive glue to shield signal leakage. Setting a blocking metal sheet has certain gaps due to metal pressure connection, which poses a risk of signal leakage and poor shielding effect. Although the gap filling with conductive glue can play a better role, it increases the number of operating procedures, is inconvenient to install, and requires re-glueing for secondary disassembly / repair, which increases costs and manpower. Summary of the invention

[0004] The present invention proposes an optical module structure that is resistant to electromagnetic interference, and the specific technical solution is as follows:

[0005] An optical module structure for resisting electromagnetic interference comprises an upper cover, a lower shell, an optical receiving component, an optical emitting component and a circuit board, wherein the circuit board is installed in the lower shell, the optical receiving component and the optical emitting component are both installed in the lower shell, the upper cover covers the lower shell and is fixed, and is characterized in that it also comprises an optical port conductive rubber for sealing the optical port and a shell conductive rubber for sealing the shell, the optical port conductive rubber is inserted into a card slot provided on the lower shell, and the sockets of the optical receiving component and the optical emitting component are both passed through the through holes on the optical port conductive rubber, and the shell conductive rubber covers the junction of the long sides of the upper cover and the lower shell; the upper cover is connected to the lower shell, and squeezes the optical port conductive rubber and the shell conductive rubber.

[0006] The present invention proposes an anti-electromagnetic interference optical module structure, in which a conductive rubber of a corresponding structure is arranged between an upper cover and a lower shell and at an optical port, and a sealing structure is formed under the pressure of the shell fixing bolts, thereby achieving an anti-electromagnetic interference effect.

[0007] Preferably, two fixed channels are arranged side by side on the lower shell at the positions where the optical receiving component and the optical transmitting component are installed, and the optical receiving component and the optical transmitting component are placed in the two fixed channels respectively, and the two fixed channels both include a fiber plugging and unplugging position section and a component fixed position section, and the optical fiber core adapters in the optical receiving component and the optical transmitting component are installed in the component fixed position section and located in the fiber plugging and unplugging position section; the component fixed position section is composed of a first card slot, a second card slot and a third card slot, the second card slot is located between the first card slot and the third card slot, the third card slot is located between the second card slot and the fiber plugging and unplugging position section, and the bottom surface of the third card slot is lower than the working surface of the fiber plugging and unplugging position section; the first card slots in the two fixed channels are connected, the third card slots in the two fixed channels are connected, and the optical port The cross section of the conductive rubber is L-shaped, the vertical plate section on the optical port conductive rubber is inserted into the third card slot, and a through hole is provided on the plate surface of the vertical plate section of the optical port conductive rubber corresponding to the optical fiber core adapter on the optical receiving component and the optical transmitting component, and the horizontal plate section on the optical port conductive rubber covers the position of the second card slot and the third card slot; an annular positioning convex ring is arranged on the outer shell of the optical fiber core adapter, the annular positioning convex ring is installed in the second card slot, and the highest point on the annular positioning convex ring is lower than the notch of the second card slot; a limiting protrusion is arranged on the back side of the horizontal plate section on the optical port conductive rubber corresponding to the second card slot in the two fixed channels, and the working surfaces of the two limiting protrusions on the back side of the horizontal plate section on the optical port conductive rubber contact the annular positioning convex ring, and the remaining working surfaces on the back side of the horizontal plate section on the optical port conductive rubber all contact the lower shell.

[0008] The structural design of the lower shell is that the first card slot is used to place the absorbing pad, which is made of insulating material and is used to absorb the electromagnetic waves generated by the components inside the shell. The second card slot is used to place the optical transceiver component. The arc-shaped slot clamps the ring of the optical transceiver component to maintain the stability of the optical transceiver component and prevent it from shaking. The optical transceiver component must be completely embedded in the second card slot. The third card slot is used to place the "L-shaped" optical port conductive rubber. The conductive rubber is made of silicone, filled with metal powder inside, and is compression molded. It has the characteristics of low resistance and conductivity. The bottom surface of the third card slot is lower than the working surface of the optical fiber plug-in and unplug position section and lower than the optical port plane. After the optical port conductive rubber is placed, an interlaced structure is formed with good sealing.

[0009] Preferably, the anti-electromagnetic interference optical module structure also includes an absorbing pad, which is made of a fixed insulating material. The absorbing pad is inserted into the first slot, and the lower bottom surface of the absorbing pad is bonded to the bottom surface of the first slot. Two U-shaped grooves are provided on the upper surface of the absorbing pad from the upper top surface downward, and the two U-shaped grooves respectively engage with the optical fiber core adapters on the optical receiving component and the optical transmitting component.

[0010] In the preferred embodiment of the technical solution of the present invention, a first notch groove with an L-shaped cross section is provided on the inner side of the two long sides of the lower shell, the shell conductive rubber is loaded into the L-shaped first notch groove, and the bonding surface between the shell conductive rubber and the L-shaped first notch groove is backed with glue; two convex strips are convexly provided on the surface of the upper cover intersecting with the lower shell, and an L-shaped second notch groove for engaging the shell conductive rubber is formed between the convex strips and the intersecting surface of the lower shell; when the lower shell and the upper cover intersect, the shell conductive rubber is clamped between the first notch groove and the second notch groove. The structural setting at the intersection of the long sides of the lower shell and the upper cover, the shell conductive rubber is clamped between the first notch groove and the second notch groove, so as to achieve sealing between the lower shell and the upper cover.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. The anti-electromagnetic interference optical module structure of the present invention utilizes the compressibility of conductive rubber to absorb the gap of the shell and the installation gap between the optical device and the shell, thereby achieving a sealed shielding effect. A special "L-shaped" conductive rubber pad is provided to handle the installation gap between the optical device and the shell, and the optical port is sealed by the pressure of the upper cover and the lower shell bolts. To handle the gap of the shell, a first notch groove is designed on the lower shell, and the conductive rubber is pasted on the first notch groove. A convex strip is provided on the upper cover, and an L-shaped second notch groove is formed between the convex strip and the interface of the lower shell to engage the conductive rubber of the shell. Under the pressure of the upper cover and the lower shell bolts, the conductive rubber is compressed to achieve sealing.

[0013] 2. The anti-electromagnetic interference optical module structure of the present invention has the advantages of simple structure manufacturing, convenient installation and operation, and cost reduction while achieving anti-electromagnetic interference. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is the appearance diagram of the structure of the optical module that resists electromagnetic interference.

[0015] Figure 2 yes Figure 1 Schematic diagram of the structure after removing the upper cover.

[0016] Figure 3 yes Figure 2 Enlarged view of point A in the figure.

[0017] Figure 4 This is the parts diagram of the lower shell.

[0018] Figure 5 This is a parts diagram of the absorbing pad.

[0019] Figure 6 This is the parts diagram of the conductive rubber of the shell.

[0020] Figure 7 This is the parts diagram of the upper cover.

[0021] Figure 8 This is the appearance diagram of the light receiving component.

[0022] Fig. 9 This is the parts diagram of the conductive rubber of the shell. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the following Figure 1-Figure 9 The present invention is further described in detail with reference to the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. In addition, the technical features involved in each embodiment of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0024] like Figure 1 , 2 As shown in Figure 3, an optical module structure for resisting electromagnetic interference includes an upper cover 100, a lower shell 200, an optical receiving component 500, an optical emitting component 600, a circuit board 700, an optical port conductive rubber 300 for sealing the optical port, a shell conductive rubber 400 for sealing the shell, and an absorbing pad 800. The circuit board 700 is installed in the lower shell 200, the optical receiving component 500 and the optical emitting component 600 are both installed in the lower shell 200, the optical receiving component 500 and the optical emitting component 600 are connected to the circuit board 700, and the upper cover 100 covers the lower shell 200 and is fixed.

[0025] like Figure 8 As shown, the optical receiving component 500 and the optical transmitting component 600 in this embodiment are known technologies in the art. The optical fiber ferrule adapters used in the optical receiving component 500 and the optical transmitting component 600 are standard parts.

[0026] like Figure 2 As shown, the optical port conductive rubber 300 is inserted into the card slot opened on the lower shell 200, and the sockets of the optical receiving component 500 and the optical transmitting component 600 are both passed through the through holes on the optical port conductive rubber 300, and the shell conductive rubber 400 covers the junction of the long sides of the upper cover 100 and the lower shell 200; the upper cover 100 is connected with the lower shell 200, and squeezes the optical port conductive rubber 300 and the shell conductive rubber 400.

[0027] like Figure 4 As shown, two fixed channels are arranged side by side on the lower shell 200 at the positions where the optical receiving component 500 and the optical transmitting component 600 are installed. The optical receiving component 500 and the optical transmitting component 600 are placed in the two fixed channels respectively. The two fixed channels both include a fiber plugging and unplugging position section 208 and a component fixed position section. The optical fiber core adapters in the optical receiving component 500 and the optical transmitting component 600 are installed in the component fixed position section and are located in the fiber plugging and unplugging position section 208.

[0028] like Figure 4 As shown, the optical fiber plugging and unplugging position section 208 is an optical port plane, and the function of the optical fiber plugging and unplugging position section 208 is to facilitate the plugging and unplugging of optical fibers.

[0029] like Figure 4 As shown, the component fixed position section is composed of a first card slot 209, a second card slot 205 and a third card slot 202. The second card slot 205 is located between the first card slot 209 and the third card slot 202, and the third card slot 202 is located between the second card slot 205 and the optical fiber plugging and unplugging position section 208. The bottom surface of the third card slot 202 is lower than the working surface of the optical fiber plugging and unplugging position section. The purpose is to form an interlaced structure when the optical port conductive rubber 300 is inserted, so as to have good sealing performance.

[0030] like Figure 4 As shown, the first slots 209 in the two fixed channels are connected, and the absorbing pad 800 is inserted into the connected first slots 209. The absorbing pad 800 is made of a fixed insulating material, and the absorbing pad 800 is inserted into the first slot 209. The bottom surface of the absorbing pad 800 is adhesively bonded to the bottom surface of the first slot 209. The absorbing pad 800 is used to absorb electromagnetic waves generated by the internal components of the shell.

[0031] like Figure 5 As shown, two U-shaped grooves 801 are spaced downward from the upper top surface of the absorbing pad 800, and the two U-shaped grooves respectively engage with the optical fiber ferrule adapters on the optical receiving component 500 and the optical transmitting component 600, further playing a fixing role.

[0032] like Figure 2 and 4 As shown, the third slots 202 in the two fixed channels are connected, the cross-section of the optical port conductive rubber 300 is L-shaped, the vertical plate section on the optical port conductive rubber 300 is inserted into the third slot 202, and a through hole 301 is provided on the plate surface of the vertical plate section of the optical port conductive rubber 300 corresponding to the optical fiber core adapter on the optical receiving component 500 and the optical transmitting component 600, and the horizontal plate section on the optical port conductive rubber 300 covers the position of the second slot 205 and the third slot 202.

[0033] like Figure 6 As shown, the cross section of the optical port conductive rubber 300 is L-shaped, and the diameter of the through hole 301 is slightly smaller than the diameter of the optical fiber ferrule adapter on the optical receiving component 500 and the optical transmitting component 600, and is used to clamp the optical fiber ferrule adapter and absorb the gap.

[0034] The vertical plate section of the optical port conductive rubber 300 is inserted into the third slot 202, and the horizontal plate section of the optical port conductive rubber 300 is located between the upper cover 100 and the lower shell 200, and is compressed under the locking pressure of the connecting bolts between the upper cover 100 and the lower shell 200 to absorb the gap. In this embodiment, the compression amount of the horizontal plate section of the optical port conductive rubber 300 should be controlled below 30% to prevent excessive deformation from causing deformation of the optical fiber ferrule adapter installation hole and forming leakage.

[0035] like Figure 8 As shown, an annular positioning convex ring is arranged on the shell of the optical fiber ferrule adapter, and the annular positioning convex ring is installed in the second card slot, and the highest point on the annular positioning convex ring is lower than the notch of the second card slot.

[0036] like Figure 6 As shown, a limiting protrusion 302 is set on the back side of the transverse plate section on the optical port conductive rubber 300 corresponding to the second card groove 205 in the two fixed channels, and the working surfaces of the two limiting protrusions 302 on the back side of the transverse plate section on the optical port conductive rubber 300 contact the annular positioning protrusion on the optical fiber core adapter, and the remaining working surfaces 303 on the back side of the transverse plate section on the optical port conductive rubber 300 all contact the optical port conductive rubber overlapping surface 207 on the lower shell 200.

[0037] like Figure 4 As shown, the lower shell 200 has a first notch 204 with an L-shaped cross section on the inner sides of the two long sides, the shell conductive rubber 400 is inserted into the L-shaped first notch 204, and the bonding surface between the shell conductive rubber 400 and the L-shaped first notch is adhesive-backed.

[0038] like Figure 7 As shown, two convex strips 105 are protruded outwardly on the interface 103 of the upper cover 100 with the lower shell, and an L-shaped second notch groove 104 for engaging the shell conductive rubber 400 is formed between the convex strip 105 and the interface 103 of the lower shell; when the lower shell 200 and the upper cover 100 are connected, the shell conductive rubber 400 is clamped between the first notch groove 204 and the second notch groove 104.

[0039] like Figure 2 , 4As shown in , 7 and 9, when the lower shell 200 and the upper cover 100 are connected, the calendering light port conductive rubber position 102 in the upper cover 100 is close to the cross-plate section of the light port conductive rubber 300, and the upper cover 100 and the lower shell interface 103 are in contact with the lower shell interface 203 on the lower shell 200, and the upper cover fiber entrance position 101 on the upper cover 100 corresponds to the plug-in fiber position section 208 on the lower shell 200, and the bolt is inserted from the inner circular hole of the upper cover 100 into the bolt mounting hole 201 on the lower shell 200 and threadedly connected, and the lower shell 200 and the upper cover 100 are fixed, and the tightening force of the bolt presses the light port conductive rubber 300 and the shell conductive rubber 400, and the compressibility of the conductive rubber is used to absorb the gap of the shell and the installation gap between the optical device and the shell.

[0040] In the embodiment of the present invention, an anti-electromagnetic interference optical module structure is provided with a conductive rubber of a corresponding structure between the upper cover and the lower shell and at the optical port, and a sealing structure is formed under the pressure of the shell fixing bolts, thereby achieving the effect of anti-electromagnetic interference. Under the premise of achieving anti-electromagnetic interference, this solution has the advantages of simple structure, convenient installation and operation, and can reduce costs.

[0041] It will be easily understood by those skilled in the art that 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. An anti-electromagnetic interference optical module structure, comprising an upper cover (100), a lower shell (200), a light receiving component (500), a light transmitting component (600) and a circuit board (700), wherein the circuit board (700) is installed in the lower shell (200), the light receiving component (500) and the light transmitting component (600) are both installed in the lower shell (200), and the upper cover (100) covers and is fixed on the lower shell (200), characterized in that: It also includes an optical port conductive rubber (300) for sealing the optical port and a shell conductive rubber (400) for sealing the shell. The optical port conductive rubber (300) is inserted into a slot provided on the lower shell (200), and the insertion ports of the optical receiving component (500) and the optical transmitting component (600) are both inserted through the through holes on the optical port conductive rubber (300). The shell conductive rubber (400) covers the joint of the long sides of the upper cover (100) and the lower shell (200). The upper cover (100) is connected to the lower shell (200) and squeezes the optical port conductive rubber (300) and the shell conductive rubber (400). Two fixed channels are arranged side by side on the lower shell (200) at positions where the optical receiving assembly (500) and the optical transmitting assembly (600) are installed. The optical receiving assembly (500) and the optical transmitting assembly (600) are respectively placed in the two fixed channels. The two fixed channels both include an optical fiber plugging and unplugging position section and an assembly fixed position section. The optical fiber core adapters in the optical receiving assembly (500) and the optical transmitting assembly (600) are installed in the assembly fixed position section and are located in the optical fiber plugging and unplugging position section. The component fixed position section is composed of a first card slot, a second card slot and a third card slot, the second card slot is located between the first card slot and the third card slot, the third card slot is located between the second card slot and the optical fiber plugging and unplugging position section, and the bottom surface of the third card slot is lower than the working surface of the optical fiber plugging and unplugging position section; The first card slots in the two fixed channels are connected, the third card slots in the two fixed channels are connected, the cross section of the optical port conductive rubber (300) is L-shaped, the vertical plate section on the optical port conductive rubber (300) is inserted into the third card slot, and through holes are provided on the plate surface of the vertical plate section of the optical port conductive rubber (300) corresponding to the optical fiber core adapters on the optical receiving component (500) and the optical transmitting component (600), and the horizontal plate section on the optical port conductive rubber (300) covers the positions of the second card slot and the third card slot; An annular positioning convex ring is arranged on the outer shell of the optical fiber ferrule adapter, and the annular positioning convex ring is installed in the second card slot, and the highest point on the annular positioning convex ring is lower than the notch of the second card slot; A limiting protrusion is provided on the back side of the transverse plate section on the optical port conductive rubber (300) corresponding to the second slots in the two fixed channels, the working surfaces of the two limiting protrusions on the back side of the transverse plate section on the optical port conductive rubber (300) contact the annular positioning protrusion, and the remaining working surfaces on the back side of the transverse plate section on the optical port conductive rubber (300) contact the lower shell (200).

2. The anti-electromagnetic interference optical module structure according to claim 1, characterized in that: The anti-electromagnetic interference optical module structure also includes an absorbing pad (800), the absorbing pad (800) is made of a fixed insulating material, the absorbing pad (800) is inserted into a first card slot, the lower bottom surface of the absorbing pad (800) is bonded to the bottom surface of the first card slot, and the absorbing pad (800) has two U-shaped grooves spaced downward from the upper top surface, and the two U-shaped grooves are respectively engaged with the optical fiber core adapters on the optical receiving component (500) and the optical transmitting component (600).

3. The anti-electromagnetic interference optical module structure according to claim 1, characterized in that: A first notch groove with an L-shaped cross section is provided on the inner sides of two long sides of the lower shell (200), the shell conductive rubber (400) is inserted into the L-shaped first notch groove, and the bonding surface between the shell conductive rubber (400) and the L-shaped first notch groove is backed with adhesive; Two convex strips are provided on the interface between the upper cover (100) and the lower shell, and an L-shaped second notch groove for engaging the shell conductive rubber (400) is formed between the convex strip and the interface between the lower shell; when the lower shell (200) and the upper cover (100) are connected, the shell conductive rubber (400) is clamped between the first notch groove and the second notch groove.

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