Miniature SFF optical module

Abstract

The utility model provides a miniature SFF optical module, a housing comprises an upper housing and a lower housing, and a PCB assembly and an optical transmit-receive assembly are arranged in a cavity between the upper housing and the lower housing; the PCB assembly, the upper shell and the lower shell are arranged in a matched mode through assembly parts, and the upper shell, the lower shell and the assembly parts are connected through bolts. According to the utility model, the rigid-flex PCB is adopted, based on the flexibility of the rigid-flex PCB, the assembly parts are arranged among the PCB assembly, the upper shell and the lower shell for positioning, the product reliability is increased, the shell is split into standard parts, the realization of small-batch production is facilitated, and the optical module can be applied to the field of miniaturized optical modules in the market, and the development of the optical module towards the miniaturization and high integration direction is realized; the size of the optical module is reduced to a certain extent, and the optical module is promoted to develop towards the miniaturization direction; the optical transceiver assembly is accurate in positioning, the optical path is stable and reliable, the PCB assembly is stable, and the anti-vibration performance is greatly improved; and the 10Gbps high-speed signal quality on a client circuit board is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of optical elements, systems or instruments, and in particular to a micro SFF optical module. Background Art

[0002] With the continuous development of optical communication technology, the integration of optical switches is getting higher and higher, and the number of optical modules used in a single switch has also increased significantly year-on-year. An optical module is composed of optoelectronic devices, functional circuits, and optical interfaces. It converts electrical signals into optical signals at the sending end. After being transmitted through optical fibers, the receiving end converts the optical signals into electrical signals to complete the transmission of information. In an optical module, its optoelectronic devices and functional circuits are collectively referred to as optical transmission modules.

[0003] In order to achieve real-time monitoring of the temperature, voltage, current, luminous power, and receiving power of each optical module, the design of the switch system is often very complex and costly. Considering the increasingly high reliability requirements for optical transmission modules and optical modules, SFF optical transceiver modules, as a major branch in the development of optical modules, have been widely used in the fields of communications and industrial control due to their high cost performance and good reliability.

[0004] As far as the current development trend of the optical module industry is concerned, it is mainly developing towards high speed, miniaturization, low cost, low power consumption and long distance. This requires optical devices to develop towards highly integrated and small packaging, with small physical size, comprehensive functions and high reliability, while meeting the requirements of high-speed signal quality and the needs of long-distance transmission and reception. This is a challenge for the design and development of optical modules. Utility Model Content

[0005] The utility model solves the problems existing in the prior art and provides a micro SFF optical module.

[0006] The technical solution adopted by the utility model is a micro SFF optical module, including a shell, the shell including an upper shell and a lower shell, a PCB assembly and an optical transceiver assembly are arranged in the cavity between the upper shell and the lower shell; the PCB assembly, the upper shell and the lower shell are arranged together by an assembly part, and the upper shell, the lower shell and the assembly part are connected by bolts.

[0007] Preferably, the lower shell includes a bottom plate and lower side plates vertically arranged on both sides of the bottom plate, and the assembly parts include limiters arranged on the bottom plate to cooperate with the optical transceiver assembly, and screw holes corresponding to the bolts are arranged on the bottom plate to cooperate with the bottom plate.

[0008] Preferably, the optical transceiver assembly includes an optical generator and an optical receiver, and a partition plate is provided perpendicular to the bottom plate on the front side of the limiter between the optical generator and the optical receiver, and the optical generator and the optical receiver are arranged side by side on both sides of the partition plate.

[0009] Preferably, a positioning column is provided on the partition plate, and the assembly also includes an E-shaped baffle plate arranged outside the positioning column, the two sides of the E-shaped baffle plate are arranged on the steps at the top of the lower side plate, and the positioning hole cooperating with the positioning column is arranged in the middle of the E-shaped baffle plate.

[0010] Preferably, the limiter is provided with two vertical slide grooves respectively matching the light generator and the light receiver; the front of the limiter, the partition plate and the rear of the E-shaped baffle are respectively provided with arc grooves corresponding to the bolts.

[0011] Preferably, the limiter is higher than the lower side plate, the PCB assembly comprises a hard-soft PCB board, the front of the PCB assembly is arranged on the top of the limiter, the rear side of the PCB assembly is connected to the pin header, and the end of the pin header is arranged on the rear side of the shell.

[0012] Preferably, the assembly also includes a protrusion arranged inside the rear sides of the two lower side plates, and recesses are provided on both sides of the pins that cooperate with the protrusion.

[0013] Preferably, the projection of the protrusion on the vertical plane is a triangle or a semicircle, and the projection on the horizontal plane is a rectangle.

[0014] Preferably, the upper shell includes a top plate, upper side plates vertically arranged on both sides of the top plate and a rear end plate vertically arranged on the rear side of the top plate, the rear end plate is matched with the rear end surface of the lower side plate, the upper side plate is matched with the upper end surface of the lower side plate and the assembly parts; the top plate is matched with screw holes corresponding to the bolts.

[0015] Preferably, a pressing block is provided at the bottom of the top plate that cooperates with the optical transceiver assembly, and the pressing block is abutted against the optical transceiver assembly.

[0016] The utility model provides a micro SFF optical module, wherein the housing comprises an upper shell and a lower shell, wherein a PCB assembly and an optical transceiver assembly are arranged in a cavity between the upper shell and the lower shell; the PCB assembly, the upper shell and the lower shell are matched with each other through an assembly part, and the upper shell, the lower shell and the assembly part are connected by bolts.

[0017] The beneficial effects of the utility model are:

[0018] (1) The PCB board is a combination of soft and hard. Based on its flexibility, assembly parts are set between the PCB assembly, the upper shell and the lower shell for positioning, which increases product reliability. At the same time, the shell is split into standardized parts to facilitate small-batch production. It can be applied to the field of miniaturized optical modules in the market, realizing the development of optical modules towards miniaturization and high integration.

[0019] (2) The use of a combination of hard and soft PCB boards, due to its flexibility and foldability, reduces the volume of the optical module to a certain extent, promoting the development of optical modules towards miniaturization;

[0020] (3) Through the configuration between the assembly parts and the PCB components, the upper shell and the lower shell, the optical transceiver components are accurately positioned, the optical path is stable and reliable, and the PCB components are stable, greatly improving the anti-vibration performance;

[0021] (4) The pin header can be soldered to the circuit board surface, greatly improving the quality of 10Gbps high-speed signals on the customer's circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0023] Figure 2 It is a side view structural schematic diagram of the utility model;

[0024] Figure 3 for Figure 2 AA section view structural diagram;

[0025] Figure 4 for Figure 2 BB section view structural schematic diagram;

[0026] Figure 5 This is a schematic diagram of the three-dimensional structure of the utility model after removing the upper shell;

[0027] Figure 6 This is a schematic diagram of the three-dimensional structure of the utility model after removing the upper shell and the E-shaped baffle. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below in conjunction with embodiments, but the protection scope of the present invention is not limited thereto.

[0029] The utility model relates to a micro SFF optical module, comprising a shell, wherein the shell comprises an upper shell 1 and a lower shell 2, a PCB assembly 3 and an optical transceiver assembly 4 are arranged in a cavity between the upper shell 1 and the lower shell 2; the PCB assembly, the upper shell 1 and the lower shell 2 are matched with each other through an assembly part, and the upper shell 1, the lower shell 2 and the assembly part are connected by bolts (not shown in the figure).

[0030] In the utility model, the outer shell is configured as an upper shell 1 and a lower shell 2, a cavity is provided between the two, a PCB assembly 3 and an optical transceiver assembly 4 are provided inside, and an assembly part is provided between the PCB assembly 3, the upper shell 1 and the lower shell 2. The existence of the assembly part enables the three to cooperate with the optical transceiver assembly 4 as a whole to realize assembly, and the upper shell 1, the lower shell 2 and the assembly part are connected by bolts, thereby reducing the existence of other connecting parts, reducing the difficulty of assembly, reducing the weight of the product, increasing the reliability of the product, and facilitating small-batch production.

[0031] The lower housing 2 includes a bottom plate 21 and lower side plates 22 vertically arranged on both sides of the bottom plate 21 . The assembly parts include a stopper 23 arranged on the bottom plate 21 to cooperate with the optical transceiver assembly 4 . The bottom plate 21 is provided with screw holes 24 corresponding to the bolts.

[0032] The optical transceiver assembly 4 includes an optical generator and an optical receiver. A partition plate 25 is provided perpendicular to the bottom plate 21 in front of a stopper 23 between the optical generator and the optical receiver. The optical generator and the optical receiver are arranged side by side on both sides of the partition plate 25 .

[0033] In the utility model, the lower shell 2 is a warehouse structure, which forms a space for placing the optical transceiver assembly 4 through the bottom plate 21, the lower side plates 22 on both sides of the bottom plate 21 and the limiting members 23, and the limiting members 23 are used as assembly parts to position the optical transceiver assembly 4. The space in front of the upper shell 1, the lower shell 2 and the limiting members 23 is used for the setting of the receiving end and / or the transmitting end of the optical transceiver assembly 4 and the connection with external components.

[0034] In the present invention, generally speaking, the optical transceiver assembly 4 of the micro SFF optical module is a light generator and a light receiver arranged in parallel, and the partition plate 25 on the front side of the limiter 23 isolates the two to ensure the relative independence of the receiving end and / or transmitting end of the optical transceiver assembly 4.

[0035] The partition plate 25 is provided with a positioning column 26, and the assembly also includes an E-shaped baffle 27 arranged outside the positioning column 26. The two sides of the E-shaped baffle 27 are arranged on the steps at the top of the lower side plate 22, and the positioning hole 28 cooperating with the positioning column 26 is arranged in the middle of the E-shaped baffle 27.

[0036] The stopper 23 is provided with two vertical slide grooves 29 respectively matching the light generator and the light receiver; the front of the stopper 23, the partition plate 25 and the rear of the E-shaped baffle 27 are respectively provided with arc grooves corresponding to the bolts.

[0037] In the utility model, the E-type baffle 27 is used as another assembly part to meet different assembly requirements. The positioning hole 28 of the E-type baffle 27 is socketed with the positioning column 26 on the partition plate 25, and its two sides are arranged on the steps at the top of the lower side plate 22 to realize the positioning of the E-type baffle 27, and the E-type baffle 27, the partition plate 25, the bottom plate 21, and the lower side plates 22 on both sides of the bottom plate 21 are used to divide a relatively independent space again, further ensuring the convenience of assembly of the receiving end and / or the transmitting end of the optical transceiver assembly 4, and the two are relatively independent; generally speaking, the positioning hole 28 is set in the middle of the E-type baffle 27.

[0038] In the present invention, in order to better limit the position, the limit member 23 is actually 3 independent or related vertical members, and each is provided with a vertical slide groove 29 that matches the corresponding light generator and light receiver. The light generator and the light receiver are installed or disassembled through the slide groove 29, and play a certain positioning role.

[0039] In the utility model, in order to better fasten, arc grooves corresponding to the bolts are provided at the front of the limit member 23, the rear of the partition plate 25 and the E-shaped baffle plate 27, and the front of the limit member 23 and the rear of the partition plate 25 and the E-shaped baffle plate 27 constitute screw holes 24 for the insertion and fastening of the bolts.

[0040] In the present invention, generally speaking, the bottom plate 21, the lower side plate 22 and the partition plate 25 are integrated.

[0041] The limiting member 23 is higher than the lower side plate 22. The PCB assembly 3 includes a hard-soft PCB board. The front of the PCB assembly 3 is arranged on the top of the limiting member 23. The rear side of the PCB assembly 3 is connected to the pin header 31. The end of the pin header 31 is arranged on the rear side of the shell.

[0042] Furthermore, in the present invention, the stopper 23 is set higher than the lower plate 22, and the PCB assembly 3 is a soft-hard PCB board. The rigid plate 32 at the front can be set on the top of the stopper 23 and fastened, and the other rigid plate 33 at the rear is connected to the pin header 31, and a 10-pin I / O surface mount pin is used to improve the 10Gbps high-speed signal quality on the circuit board. The surface mount pin (pin header 31) is welded to achieve surface welding with the circuit board, solving the problem of poor 10G high-speed signal caused by perforated welding of traditional optical modules; Obviously, the rigid plate 32 at the front and the other rigid plate 33 at the rear are connected by a harness or a flexible PCB 34 ( Figure 3 and Figure 4 The middle is for illustration. Figure 5 and Figure 6 ) connection.

[0043] The assembly also includes a protrusion 20 disposed inside the rear side of the two lower side plates 22 , and recesses are disposed on both sides of the pin header 31 that cooperates with the protrusion 20 .

[0044] The projection of the protrusion 20 on the vertical plane is a triangle or a semicircle, and the projection on the horizontal plane is a rectangle.

[0045] In the present invention, due to the arrangement of the pin header 31, the assembly here also needs to include the pin header 31 therein, so a protrusion 20 is arranged inside the rear side of the lower side plate 22, which cooperates with the concave and convex parts on both sides of the pin header 31 to achieve the positioning of the pin header 31; generally speaking, the protrusion 20 and the concave part of this concave and convex cooperation are arranged as a horizontal structure.

[0046] The upper shell 1 includes a top plate 11, upper side plates 12 vertically arranged on both sides of the top plate 11, and a rear end plate 13 vertically arranged on the rear side of the top plate 11. The rear end plate 13 is matched with the rear end surface of the lower side plate 22, and the upper side plate 12 is matched with the upper end surface and assembly parts of the lower side plate 22; screw holes 14 corresponding to bolts are provided in conjunction with the top plate 11.

[0047] A pressing block 15 is disposed at the bottom of the top plate 11 that cooperates with the optical transceiver assembly 4 , and the pressing block 15 is disposed against the optical transceiver assembly 4 .

[0048] In the present invention, the upper shell 1 obviously includes a top plate 11, and the upper side plate 12 and the rear end plate 13 cooperate with the upper edge and rear edge of the lower side plate 22; obviously, the lower edge of the upper side plate 12 at the E-shaped baffle 27 is also set as a step structure to facilitate the setting of the E-shaped baffle 27.

[0049] In the present invention, considering that the rear half of the optical module as a whole is heavier, a pressure block 15 is provided under the top plate 11. The pressure block 15 should be just against the optical transceiver assembly 4, specifically, the receiving end and / or the transmitting end of the optical transceiver assembly 4, to balance the overall optical module and facilitate assembly.

[0050] In the present invention, generally speaking, the top plate 11, the upper side plate 12 and the rear end plate 13 are integrated.

[0051] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A micro SFF optical module, comprising a housing, characterized in that: The housing comprises an upper housing and a lower housing, wherein a PCB assembly and an optical transceiver assembly are arranged in a cavity between the upper housing and the lower housing; the PCB assembly, the upper housing and the lower housing are arranged in cooperation with each other through an assembly part, and the upper housing, the lower housing and the assembly part are connected by bolts; The optical transceiver assembly includes an optical generator and an optical receiver, and a partition plate is provided perpendicular to the bottom plate on the front side of the limiting member between the optical generator and the optical receiver, and the optical generator and the optical receiver are arranged side by side on both sides of the partition plate; a positioning column is provided on the partition plate, and the assembly also includes an E-shaped baffle plate arranged outside the positioning column, and the two sides of the E-shaped baffle plate are arranged on the steps at the top of the lower side plate, and the positioning hole cooperating with the positioning column is arranged in the middle of the E-shaped baffle plate.

2. A micro SFF optical module according to claim 1, characterized in that: The lower shell includes a bottom plate and lower side plates vertically arranged on both sides of the bottom plate, and the assembly parts include a limiter arranged on the bottom plate to match the optical transceiver assembly, and the bottom plate is provided with screw holes corresponding to the bolts.

3. The micro SFF optical module according to claim 1, characterized in that: The limiting member is provided with two vertical slide grooves respectively matching the light generator and the light receiver; the front part of the limiting member, the partition plate and the rear part of the E-shaped baffle are respectively provided with arc grooves corresponding to the bolts.

4. The micro SFF optical module according to claim 2, characterized in that: The limiting member is higher than the lower side plate, the PCB assembly includes a soft-hard combined PCB board, the front of the PCB assembly is arranged on the top of the limiting member, the rear side of the PCB assembly is connected to the pin header, and the end of the pin header is arranged on the rear side of the shell.

5. The micro SFF optical module according to claim 4, characterized in that: The assembly also includes a protrusion arranged inside the rear sides of the two lower side plates, and recesses are arranged on both sides of the pins matching the protrusion.

6. The micro SFF optical module according to claim 5, characterized in that: The projection of the convex block on the vertical plane is a triangle or a semicircle, and the projection on the horizontal plane is a rectangle.

7. The micro SFF optical module according to claim 1, characterized in that: The upper shell includes a top plate, upper side plates vertically arranged on both sides of the top plate, and a rear end plate vertically arranged on the rear side of the top plate. The rear end plate is matched with the rear end surface of the lower side plate, and the upper side plate is matched with the upper end surface of the lower side plate and the assembly parts; screw holes corresponding to the bolts are provided in conjunction with the top plate.

8. The micro SFF optical module according to claim 7, characterized in that: A pressing block is arranged at the bottom of the top plate matched with the optical transceiver assembly, and the pressing block is pressed against the optical transceiver assembly.

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