Connecting device of external light source

Abstract

The embodiment of the invention provides a connecting device of an external light source. The connecting device is connected with a PCB through a fastener. According to the invention, the problem of quality risk due to the fact that the external light source is connected to the PCB in a welding mode in the prior art is solved, and the effect of safely installing the external light source is further achieved.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of communications, and in particular, to a connection device for an external light source. Background Art

[0002] With the rapid development of new communication services such as intelligent driving, Internet of Things, video services, and 5G networks, the demand for network bandwidth has increased dramatically, bringing about the problem of continuous increase in the demand for system equipment bandwidth. The IEEE / OIF standard organization has doubled the Serdes rate in about three years, and the industry's chip Serdes rate has increased by one generation in about three years. The improvement of CPO (co-packaged optics) technology has become a trend of future development. Among them, CPO switches are the key components of CPO technology.

[0003] In the related art, the external light source is mainly installed in the CPO switch by using a connector, and the connector is welded on the PCB board. However, since the optical port of the connector is a plastic component and cannot withstand the reflow soldering temperature, the connector cannot be automatically welded and needs to be manually welded after the switch board is welded and assembled. The manual welding operation has a great quality risk and cannot be mass-produced.

[0004] Therefore, the installation problem of external light sources needs to be improved urgently. Summary of the invention

[0005] An embodiment of the present invention provides a connection device for an external light source, so as to at least solve the problem of quality risk caused by connecting the external light source to a PCB board by welding in the related art.

[0006] According to an embodiment of the present invention, a connecting device for an external light source is provided, including: the connecting device is connected to a PCB board via a fastener.

[0007] According to another embodiment of the present invention, a CPO switch is provided, comprising the above-mentioned connecting device.

[0008] According to the present invention, the external light source is installed by using a connecting device, and the connecting device is connected to the PCB board by a fastener. Therefore, the influence of high temperature of welding on the external light source is avoided, thereby solving the problem of quality risk in the related art due to connecting the external light source to the PCB board by welding, and thus achieving the effect of safe installation of the external light source. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural diagram of a CPO system in the related art;

[0010] Figure 2It is a structural schematic diagram of an optoelectronic same-port connector in the related art;

[0011] Figure 3 It is a structural schematic diagram of a cage in the related art;

[0012] Figure 4 It is a connection diagram of an optoelectronic same-port connector, a cage, and a PCB board in the related art;

[0013] Figure 5 is a connection diagram of an optoelectronic same-port connector, a cage, and a PCB board according to an embodiment of the present invention;

[0014] Figure 6 is a schematic structural diagram of an optoelectronic same-port connector according to an embodiment of the present invention;

[0015] Figure 7 is an exploded view of a cage and heat sink structure according to an embodiment of the present invention. DETAILED DESCRIPTION

[0016] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings and in combination with the embodiments.

[0017] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0018] Figure 1 It is a structural diagram of a CPO system in the related art.

[0019] The CPO switch is briefly introduced as follows: Figure 1 As shown in the figure, the switch chip is closely surrounded by 16 CPO optical engine modules, which is equivalent to implementing the optoelectronic modulation part of the original panel pluggable optical module in the OE (optical engine) inside the CPO switch host, and the panel only retains the light source module and the panel I / O (input / output) optical port connector. The light output of the panel pluggable light source needs to be input to the OE optical engine inside the switch through a polarization-maintaining optical fiber ribbon, and the OE optical engine needs to be connected to the panel I / O port optical connector through a single-mode optical fiber ribbon to realize the reception (Rx×N) and transmission (Tx×N) of N channel service optical signals.

[0020] Figure 2 It is a structural diagram of an optoelectronic same-port connector in the related technology. Figure 3 is a schematic diagram of the structure of a cage in the related art, Figure 4 It is a connection diagram of an optoelectronic same-port connector, a cage, and a PCB board in the related technology.

[0021] like Figure 2 and Figure 4As shown, one end of the optoelectronic same-port connector is fixed to the PCB board by welding through the provision of electrical pins.

[0022] like Figure 3 and Figure 4 As shown, the bottom of the cage is provided with multiple groups of pins, so that the cage is fixed on the PCB board through the pins. Since the pins have a certain length, the PCB board needs to be provided with positioning holes of corresponding length, so there are certain requirements for the thickness of the PCB board.

[0023] The electrical port pins of the above-mentioned optoelectronic connectors are all designed with pin pins, which need to be welded through holes, and the matching cage also needs to be fixed through through holes. At the same time, since the external light source has 8 built-in lasers, lasers are temperature-related components, and the luminous power drops sharply at high temperatures, and the power consumption increases sharply. Therefore, the existing optoelectronic connectors and cages have the following key problems:

[0024] 1. Manual welding is required.

[0025] Since the optical port of the optoelectronic same-port connector is a plastic component that cannot withstand the reflow soldering temperature, this connector cannot be automatically soldered. It needs to be manually soldered after the switch board is soldered and assembled. Manual soldering operations have great quality risks and cannot be mass-produced.

[0026] 2. Double-sided mounting is limited.

[0027] At present, the electrical port pin length of the optoelectronic same-port connector is 3.68mm, and the pin welding through-hole runs through from the PCB surface to the bottom surface. Therefore, if an optoelectronic same-port connector is to be mounted on the PCB surface and bottom surface respectively, there are strict requirements on the thickness of the PCB and the through-hole method. Therefore, the current optoelectronic same-port connector method is not conducive to double-sided mounting.

[0028] 3. Insufficient heat dissipation capacity.

[0029] The external light source has 8 built-in lasers. Lasers are temperature-dependent components. The luminous power drops sharply and the power consumption increases sharply at high temperatures. In addition, lasers are prone to failure at high temperatures.

[0030] In order to solve the above problem, a connecting device for an external light source is provided in this embodiment. Figure 5 Schematic diagram of the connection of the optoelectronic same-port connector, cage, and PCB board according to an embodiment of the present invention. Figure 5 As shown, the connecting device is connected to the PCB board via fasteners.

[0031] Since the external light source is installed by using a connecting device, and the connecting device is connected to the PCB board by fasteners, the influence of high temperature of welding on the external light source is avoided, thereby solving the problem of quality risk in the related art caused by connecting the external light source to the PCB board by welding, thereby achieving the effect of safe installation of the external light source.

[0032] Furthermore, the connection device comprises: an optoelectronic same-port connector and a cage, and the optoelectronic same-port connector is plug-connected to the cage.

[0033] Furthermore, the cage is connected to the PCB board via fasteners.

[0034] Furthermore, the optoelectronic same-port connector is connected to the PCB board via a fastener.

[0035] Furthermore, the optoelectronic connector and the cage are both connected to the PCB board via fasteners.

[0036] Through the above device, after the optoelectronic same-port connector and the cage are plugged and connected, the cage is fixed on the PCB board by fasteners, and then the optoelectronic same-port connector can also be fixed on the PCB board, which changes the traditional welding method and avoids the damage to the optical port of the optoelectronic same-port connector caused by the high temperature of welding. Therefore, the problem of quality risk in fixing the optoelectronic same-port connector and the cage on the PCB board by welding in the related technology is solved, thereby achieving the effect of safely installing the optoelectronic same-port connector and the cage.

[0037] Furthermore, two groups of optoelectronic same-port connectors and cages are provided and are respectively mounted on two sides of the PCB board through fasteners.

[0038] Furthermore, the optoelectronic same-port connector is connected to the PCB board via a fastener.

[0039] Furthermore, the optoelectronic connector and the cage are both connected to the PCB board via fasteners.

[0040] Furthermore, the fastener includes one of the following: a bolt, a stud, a screw, a self-tapping screw, a wood screw, a pin, a rivet assembly and a connecting pair, and a magnetic part.

[0041] Furthermore, a positioning pin is provided at one end of the optoelectronic same-port connector, and a positioning hole for plugging with the positioning pin is opened at one end of the cage.

[0042] The cage is a box structure with an installation space inside, and an opening is provided at one end for connecting the optoelectronic same-port connector. The inner wall of the cage opening is provided with a positioning hole. Positioning pins are installed on both sides of the end of the optoelectronic same-port connector close to the cage. When one end of the optoelectronic same-port connector is inserted into the opening of the cage, the positioning pins are inserted into the positioning holes to fix the optoelectronic same-port connector and the cage. The positioning pins can be metal pins, or pins made of wood or plastic.

[0043] Furthermore, a positioning hole is provided at one end of the optoelectronic same-port connector, and a positioning pin plugged into the positioning hole is provided at one end of the cage.

[0044] In an exemplary embodiment, the cage is a box structure with an installation space provided inside, and an opening is provided at one end for connecting the optoelectronic same-port connector, and a positioning pin is provided on the inner wall of the cage opening. Positioning holes are provided on both sides of the end of the optoelectronic same-port connector close to the cage, and when one end of the optoelectronic same-port connector is inserted into the opening of the cage, the positioning pin is inserted into the positioning hole to fix the optoelectronic same-port connector and the cage. The positioning pin can be a metal pin, or a pin made of wood or plastic.

[0045] Figure 6 is a schematic diagram of the structure of an optoelectronic same-port connector according to an embodiment of the present invention. Figure 6 As shown,

[0046] Furthermore, the side wall of the optoelectronic same-port connector is provided with an elastic plug-in which is interference-fitted with the positioning hole on the PCB board.

[0047] In an exemplary embodiment, the elastic plug-in may be made of a plastic material or a rubber material.

[0048] Therefore, the setting of the elastic plug-in can not only ensure that the optoelectronic same-port connector and the PCB board are further firmly connected, but also further enhance the connection strength between the optoelectronic same-port connector and the cage. The positioning hole can be a circular hole, an elliptical hole, or a polygonal hole, and the shape of the cross section of the elastic plug-in is similar to the shape of the cross section of the positioning hole. And the cross section area of ​​the elastic plug-in is larger than the cross section area of ​​the positioning hole, so that the elastic plug-in can be inserted into the positioning hole within the range of elastic deformation, and the deformation recovery ability of the elastic plug-in is utilized to clamp the elastic plug-in in the positioning hole, so as to further improve the connection strength between the optoelectronic same-port connector and the PCB board. And the end of the elastic plug-in away from the optoelectronic same-port connector is provided with a rounded corner, so as to facilitate the insertion of the elastic plug-in into the positioning hole.

[0049] Figure 7 is an exploded view of the cage and radiator structure according to an embodiment of the present invention, as shown in Figure 7 As shown,

[0050] Furthermore, the connecting device also includes a water-cooling tube plate and a spring sheet;

[0051] The side wall of the cage is provided with a mounting groove, and the spring piece is arranged in the mounting groove;

[0052] The water-cooling tube plate abuts against the spring sheet.

[0053] Furthermore, the mounting groove is arranged close to the position of the laser.

[0054] In an exemplary embodiment, the depth of the mounting groove may be equal to the thickness of the spring sheet, so that the side wall of the water-cooling tube sheet can abut against the side wall of the spring sheet. Of course, the depth of the mounting groove may also be less than the thickness of the spring sheet, further facilitating the abutment of the water-cooling tube sheet with the spring sheet. When the water-cooling tube sheet is placed in the mounting groove of the cage and the water-cooling tube sheet abuts against the spring sheet, a cable tie may be used to bind the water-cooling tube sheet to the cage, or other connection methods may be used, which are not limited in the embodiments of the present invention.

[0055] Furthermore, the area of ​​the spring sheet can be smaller than the area of ​​the installation slot, and the spring sheet can be fixed to the cage by gluing or binding with a cable tie. Alternatively, since the spring sheet is elastic, the area of ​​the spring sheet can be larger than the area of ​​the installation slot, and the spring sheet can be clamped in the installation slot within the elastic range of the spring sheet.

[0056] Furthermore, the positioning pin and the positioning hole are connected by colloid.

[0057] In an exemplary embodiment, after the positioning pin is inserted into the positioning hole, glue may be poured into the positioning hole to fix the positioning pin and the positioning hole.

[0058] Furthermore, the connection device also includes: a magnetic strip, which is detachably connected to the side wall of the PCB board and is magnetically fixed to the optoelectronic same-port connector and / or the cage.

[0059] Furthermore, the magnetic sticker is a strong magnetic sticker.

[0060] In an exemplary embodiment, the strong magnetic strip can be made of a soft magnetic material, such as barium ferrite magnetic rubber, which has strong magnetic properties. Glue is applied on one side of the barium ferrite magnetic rubber so that one side of the barium ferrite magnetic rubber is bonded to the PCB board, and the other side is fixed to the metal parts or cage in the optoelectronic connector by the magnetism of the magnetic strip.

[0061] In an exemplary embodiment, the side wall of the strong magnetic strip is covered with a film or coating, such as a polymer coating, to reduce the probability of the strong magnetic strip being damaged or corroded.

[0062] Furthermore, the surface of the spring is coated with thermal grease.

[0063] Because thermal grease has good thermal conductivity, filling performance, high temperature resistance, insulation performance, and corrosion resistance, it greatly improves the heat dissipation efficiency and reliability, and effectively ensures the efficiency of safe operation of the laser.

[0064] Furthermore, the shrapnel is made of brass.

[0065] Since brass has good heat dissipation and elasticity, not only can the shrapnel be stuck in the installation slot by utilizing its own elasticity, but it also facilitates the transfer of heat energy, further improving the heat dissipation efficiency of the laser.

[0066] Furthermore, the metal pin pad of the optoelectronic connector contacts the PCB pad.

[0067] Directly contacting the metal pin pad of the optoelectronic connector with the PCB pad is beneficial to:

[0068] 1. Stable electrical signal transmission: Direct contact between the metal pin pad and the PCB pad can provide more stable electrical signal transmission and reduce signal distortion and interference.

[0069] 2. Low transmission loss: There is no additional contact resistance between the metal pin pad and the PCB pad, which can reduce the energy loss during transmission.

[0070] 3. Low plugging and unplugging times: Direct contact between the metal pin pad and the PCB pad can reduce the number of plugging and unplugging times, reducing the wear and possibility of failure of the connector.

[0071] 4. Improve connection stability: Direct contact between the metal pin pad and the PCB pad can improve the stability of the connection and reduce the problem of disconnection or signal interruption caused by looseness or poor contact.

[0072] 5. Improve connection speed: Direct contact between metal pin pad and PCB pad can improve the connection speed and response time, which greatly meets the requirements for higher transmission speed.

[0073] In summary, the effects achieved by the connection device are as follows:

[0074] 1. A solder-free and crimp-free photoelectric same-port connection device is designed, which can be disassembled and reused. Solder-free avoids the influence of soldering temperature on the optical port components.

[0075] 2. A solder-free and crimped optoelectronic same-port connector and cage are designed, so that the external light source module can be assembled on one side or two sides, without any requirements on the PCB thickness and stacking design, and no longer occupies the inner layer routing of the PCB, etc.

[0076] 3. By designing blank areas, shrapnel, water-cooled tube plates and other components in the cage, efficient heat dissipation is achieved, ensuring the stability and reliability of the external light source laser, greatly reducing the failure rate of the laser and reducing power consumption.

[0077] 4. By designing the positioning pin of the optoelectronic same-port connector and fixing it with the positioning hole on the cage, and then using the screws on both sides of the cage to lock it, the reliability problems caused by traditional welding connector welding are avoided, such as poor welding, connector stress causing solder to detach from the board, and other failure problems.

[0078] Furthermore, the optical port of the optoelectronic same-port connector is connected to the optical port end of the CPO through an optical fiber, and the CPO is closely distributed around the Switch chip. The optoelectronic same-port connector is connected to the optical port end of the CPO through an optical fiber, and has the advantages of high bandwidth, low loss, anti-interference, high reliability, close distribution and flexibility, and can provide stable and efficient data transmission capabilities.

[0079] In this embodiment, a CPO switch is also provided, including the above-mentioned connecting device.

[0080] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A connection device for an external light source, characterized in that: The connecting device is connected to the PCB board via a fastener.

2. The connection device according to claim 1, characterized in that The connecting device comprises an optoelectronic same-port connector and a cage, and the optoelectronic same-port connector is plug-connected to the cage.

3. The connection device according to claim 2, characterized in that The cage is connected to the PCB board via the fastener.

4. The connection device according to claim 2, characterized in that The optoelectronic same-port connector is connected to the PCB board through the fastener.

5. The connection device according to claim 2, characterized in that The optoelectronic same-port connector and the cage are both connected to the PCB board through the fastener.

6. The connection device according to claim 1, characterized in that: The fasteners include one of the following: bolts, studs, screws, self-tapping screws, wood screws, pins, rivet assemblies and connecting pairs, and magnetic parts.

7. The connection device according to claim 2, characterized in that: One end of the optoelectronic same-port connector is provided with a positioning pin, and one end of the cage is provided with a positioning hole plugged with the positioning pin.

8. The connection device according to claim 2, characterized in that: A positioning hole is provided at one end of the photoelectric same-port connector, and a positioning pin plugged into the positioning hole is provided at one end of the cage.

9. The connection device according to claim 2, characterized in that: It also includes water-cooled tube sheets and shrapnel; The side wall of the cage is provided with a mounting groove, and the spring piece is arranged in the mounting groove; The water-cooling tube plate abuts against the spring sheet.

10. The connection device according to claim 2, characterized in that: The side wall of the optoelectronic same-port connector is provided with an elastic plug-in unit which is interference-fitted with the positioning hole on the PCB board.

11. The connection device according to claim 7 or 8, characterized in that: The positioning pin and the positioning hole are connected via colloid.

12. The connection device according to claim 10, characterized in that Also includes: The magnetic strip is detachably connected to the side wall of the PCB board and is magnetically fixed to the optoelectronic connector and / or the cage.

13. The connection device according to claim 12, characterized in that The magnetic sticker is a strong magnetic sticker.

14. The connection device according to claim 9, characterized in that The surface of the spring is coated with thermal conductive silicone grease.

15. The connection device according to claim 9, characterized in that The shrapnel is made of brass.

16. The connection device according to claim 2, characterized in that: The metal pin pad of the optoelectronic same-port connector contacts the PCB pad.

17. The connection device according to claim 2, characterized in that: The photoelectric same-port connector and the cage are provided in two groups and are respectively installed on two sides of the PCB board through the fasteners.

18. The connection device according to claim 9, characterized in that The mounting groove is arranged close to the position of the laser.

19. A CPO switch, characterized in that: Comprising a connecting device as claimed in any one of claims 1 to 18.

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