A small-sized one-to-two mechanical optical switch

Abstract

This invention relates to an optical transmission component, specifically a small-sized one-to-two mechanical optical switch. It includes a relay body with an extension arm. The extension arm is connected to a wedge lens. A four-hole tube is located on each side of the wedge lens; one four-hole tube houses a single-fiber collimator, and the other a dual-fiber collimator. An optical transmission tube is positioned between the two four-hole tubes, containing a light-shielding sleeve. A socket adapted to the wedge lens is located on one side of the optical transmission tube. The relay body has multiple pins arranged in two rows. An electromagnetic structure for driving the wedge lens into and out of the socket is located on the extension arm. This optical switch provides a one-to-two function. When an optical fiber breaks or other transmission failures occur, the optical switch enables signal rerouting, switching from the primary route to a backup route to ensure uninterrupted communication.

Description

Technical Field

[0001] This invention relates to an optical transmission element, specifically a small-sized one-to-two mechanical optical switch. Background Technology

[0002] With the rapid development of optical communication technology and the widespread application of DWDM technology, optical fiber is not only widely used in backbone networks, but is also extending to metropolitan area networks and access networks, and gradually penetrating into thousands of households (FTTH).

[0003] Optical switches can directly realize functions such as optical path self-healing protection and routing selection in optical communication networks, overcoming the electronic bottleneck of optical-electrical-optical conversion and fully reflecting the characteristics of high-capacity, high-speed transmission and switching in optical networks. They can be widely used in optical network protection, optical signal add / drop multiplexing / demultiplexing (OADM), optical cross-connectors (OXC), testing of optical fiber communication system devices, and channel monitoring and testing of optical fiber networks, and are increasingly becoming a fundamental component for information exchange in optical networks.

[0004] However, most conventional optical switches currently rely on circuit modules for switching. When the optical fiber breaks or other route transmission failures occur, there is a gap in the switching between the main route and the backup route, and communication will be interrupted. Summary of the Invention

[0005] The purpose of this invention is to provide a small-sized one-to-two mechanical optical switch to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A small-sized one-to-two mechanical optical switch includes a relay body, an extension arm on the relay body, and the extension arm is connected to a wedge lens.

[0008] A four-hole tube is set on each side of the wedge lens, with a single-fiber collimator installed on one of the four-hole tubes and a double-fiber collimator installed on the other four-hole tube.

[0009] A light transmission tube is set between the two four-hole tubes. A light-shielding sleeve is installed inside the light transmission tube, and an insertion port adapted to a wedge lens is provided on one side of the light transmission tube.

[0010] The relay body has multiple pins arranged in two rows, and the extension arm has an electromagnetic structure for driving the wedge lens into and out of the socket.

[0011] When the wedge lens enters the socket, two pins on one row of pins are de-energized, while two pins on the other row of pins are energized.

[0012] When the wedge lens is removed from the socket, two pins on one row of pins are energized, two pins on the other row of pins are de-energized, and the light-shielding sleeve seals the socket.

[0013] The small-sized one-to-two mechanical optical switch described above: the electromagnetic structure connects to the fitting, and the wedge-shaped lens is fitted onto the fitting;

[0014] The light transmission tube has an elastic cavity and a sleeve that are interconnected inside. The light shield is slidably disposed in the elastic cavity and the sleeve. A second spring is also disposed in the elastic cavity to connect the light shield and the inner wall of the light transmission tube.

[0015] The fitting has a beveled surface at one end corresponding to the insertion port, and the head end of the light-shielding sleeve has a conical surface.

[0016] The small-sized one-to-two mechanical optical switch described above: the optical transmission tube is divided into two parts, namely the first tube body and the second tube body;

[0017] The interior of the second tube has a channel, the tail end of the light-shielding sleeve is slidably fitted into the channel, and the outer side of the head end of the light-shielding sleeve has a step, which divides the outer wall of the light-shielding sleeve into a coarse diameter section and a fine diameter section.

[0018] The conical surface is set at the end of the coarse diameter section, the second spring is sleeved on the outside of the fine diameter section, and one end of the second spring abuts against the step, the other end of the second spring abuts against the tail end face of the elastic cavity, and the tail end of the fine diameter section slides into the sleeve.

[0019] The insertion port is located on the first tube body, with one side of the insertion port flush with the head end face of the elastic cavity. Lugs are provided on the outer walls of both the first and second tube bodies.

[0020] The small-sized one-to-two mechanical optical switch described above: The electromagnetic structure includes two electromagnetic actuators mounted on the extension arm, a slider is provided between the two electromagnetic actuators, the slider is fixedly connected to the insertion piece, and the slider is also slidably engaged with the extension arm;

[0021] Two pins on one row of pins correspond to two locking pins on one of the mating brackets via two wiring terminals;

[0022] Two pins on the other row of pins correspond to two locking pins on another connector via two additional terminals.

[0023] The two docking frames are set at different heights and are both connected to tie rods, which are connected to plug fittings.

[0024] As described above, the small-sized one-to-two mechanical optical switch has a pin module installed on each side of the relay body, the wiring terminals are set on the pin module, and the pin module is connected to the PIN pin.

[0025] Each pin module is equipped with a row of terminals. The terminals that mate with the pins are located at the beginning and end of the same row of terminals, and the remaining terminals are connected to the connector.

[0026] A central module is installed at the center of the relay body. Two sets of guide posts are fixedly installed on the central module, and guide holes that slide with the guide posts are opened on the docking frame.

[0027] The small-sized one-to-two mechanical optical switch described above: the central module has a pull hole, the pull rod slides in the pull hole, a stop is fixedly installed on the pull rod, and the central module has a receiving hole;

[0028] A first spring is provided in the receiving hole. The first spring is sleeved on the outside of a section of the pull rod, and one end of the first spring abuts against the inner wall of the receiving hole, while the other end of the first spring abuts against the stop.

[0029] As described above, the small-sized one-to-two mechanical optical switch has a protruding post fixedly installed at one end of the pull rod near the optical transmission tube, the insertion part has an insertion channel, and straight grooves are provided on both sides of the insertion part. The straight grooves are connected to the insertion channel, and the protruding post is slidably embedded in the straight groove.

[0030] As described above, the small-sized one-to-two mechanical optical switch has two sets of first and second fixed posts fixed on the pull rod, which are distributed vertically.

[0031] Furthermore, the first fixed post and the second fixed post are located on both sides of the tie rod. One end of the first fixed post is rotatably connected to the upper end of one set of hinge rods, and the lower end of the hinge rod is connected to the docking frame on the same side through a set of extension posts.

[0032] One end of the second fixed column is rotatably connected to the lower end of another set of hinge rods, and the upper end of the hinge rods is connected to the docking frame on the same side through another set of extension columns.

[0033] The small-sized one-to-two mechanical optical switch described above: the pull rod has a two-section structure, and the two sections are connected by a fixing plate.

[0034] Compared with the prior art, the beneficial effects of the present invention are as follows: When the single-fiber collimator is used as the optical input end and the wedge lens is not in the optical transmission tube, the optical path is output through one of the pigtails of the dual-fiber collimator; when the wedge lens enters the optical transmission tube, the switching between the main route and the backup route is first achieved by switching the power on and off of a local pin of the relay body; secondly, the optical path is then refracted by the wedge lens and output through the other pigtail of the dual-fiber collimator; in this way, the optical switch in the present invention has a one-to-two function. When the optical fiber breaks or other route transmission failures occur, the optical switch in the present invention is used to realize the signal detour routing, switching from the main route to the backup route to ensure uninterrupted communication.

[0035] In addition, when the wedge lens is removed from the socket, the light-shielding sleeve can also seal the socket to prevent the light signal from being scattered, refracted, and diffusely reflected in the light transmission tube and the eight-hole tube, thus ensuring the consistency of the light signal as much as possible. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of a small-sized one-to-two mechanical optical switch.

[0037] Figure 2 This is a schematic diagram of the structure of a small-sized one-to-two mechanical optical switch from another angle.

[0038] Figure 3 This is a partial disassembly diagram of a small-sized one-to-two mechanical optical switch.

[0039] Figure 4 This is a schematic diagram of the eight-hole tube and the extension arm.

[0040] Figure 5 This is a schematic diagram of the structure after the eight-hole tube is disassembled.

[0041] Figure 6 This is a schematic diagram of the connector and the optical transmission tube.

[0042] Figure 7 In order to be in Figure 6 This is a structural diagram after the central module has been removed.

[0043] Figure 8 for Figure 7 A structural diagram from another angle.

[0044] Figure 9 This is a structural diagram of the tie rod and the connecting frames on both sides.

[0045] Figure 10 for Figure 9 Enlarged view of point A in the middle.

[0046] Figure 11 This is a schematic diagram of the structure after one end of the pull rod has been removed from the insertion channel.

[0047] Figure 12 This is a front view of the light transmission tube.

[0048] Figure 13 for Figure 12 MM-directed sectional view.

[0049] Figure 14 for Figure 13 A three-dimensional structural diagram.

[0050] Figure 15 for Figure 14 Disassembly diagram.

[0051] Figure 16 for Figure 15 A three-dimensional image.

[0052] In the diagram: 1. Relay body; 2. Dual-fiber collimator; 3. Single-fiber collimator; 4. Extension arm; 5. Wedge lens; 6. Light transmission tube; 61. First tube body; 62. Second tube body; 601. Socket; 602. Sleeve; 603. Elastic cavity; 7. Pin; 8. Connector; 801. Socket; 802. Straight slot; 9. Central module; 901. Accommodation hole; 902. Guide post; 903. Pull hole; 10. Pin module; 11. Electromagnetic driver; 12. Slider; 13. Terminal block; 14. Connector; 15. Connecting bracket; 16. Clamping foot; 17. Pull rod; 1701. Fixing plate; 1702. Protruding post; 18. First spring; 19. Stop; 20. First fixing post; 21. Second fixing post; 22. Hinge rod; 23. Extension post; 24. Light shield; 25. Second spring. Detailed Implementation

[0053] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0054] Please see Figures 1-16 As an embodiment of the present invention, the small-sized one-to-two mechanical optical switch includes a relay body 1, an extension arm 4 is provided on the relay body 1, and the extension arm 4 is connected to a wedge lens 5.

[0055] A four-hole tube is set on each side of the wedge lens 5. A single-fiber collimator 3 is installed on one of the four-hole tubes, and a double-fiber collimator 2 is installed on the other four-hole tube. The two four-hole tubes form an eight-hole tube.

[0056] A light transmission tube 6 is set between two four-hole tubes. A light-shielding sleeve 24 is set inside the light transmission tube 6, and an insertion port 601 adapted to the wedge lens 5 is set on one side of the light transmission tube 6.

[0057] The relay body 1 is provided with multiple pins 7, which are arranged in two rows. The extension arm 4 is provided with an electromagnetic structure for driving the wedge lens 5 into and out of the socket 601.

[0058] When the wedge lens 5 enters the socket 601, two pins 7 on one row of pins 7 are de-energized, while two pins 7 on the other row of pins 7 are energized.

[0059] When the wedge lens 5 is removed from the socket 601, two pins 7 on one row of pins 7 are energized, two pins 7 on the other row of pins 7 are de-energized, and the light shield 24 seals the socket 601.

[0060] In this embodiment, the single-fiber collimator 3 serves as the optical input terminal. When the wedge lens 5 is not in the optical transmission tube 6, the optical path is output through one of the pigtails of the dual-fiber collimator 2. When the wedge lens 5 enters the optical transmission tube 6, the switching between the main route and the backup route is first achieved by switching the power on and off of the local PIN 7 of the relay body 1. Then, the optical path is refracted by the wedge lens 5 and output through the other pigtail of the dual-fiber collimator 2. In this way, the optical switch in this invention has a one-to-two function. When the optical fiber breaks or other route transmission failures occur, the optical switch in this invention can be used to realize the signal detour routing, switching from the main route to the backup route to ensure uninterrupted communication.

[0061] In addition, when the wedge lens 5 exits the socket 601, the light shield 24 can also seal the socket 601 to prevent the light signal from being scattered, refracted and diffused in the light transmission tube 6 and the eight-hole tube, so as to ensure the consistency of the light signal as much as possible.

[0062] As a further embodiment of the present invention, the electromagnetic structure connecting fitting 8 has a wedge-shaped lens 5 fitted onto the fitting 8.

[0063] The light transmission tube 6 has an elastic cavity 603 and a sleeve 602 that are interconnected inside. The light shield 24 is slidably disposed in the elastic cavity 603 and the sleeve 602. A second spring 25 is also provided in the elastic cavity 603 to connect the light shield 24 and the inner wall of the light transmission tube 6.

[0064] Among them, the section of the fitting 8 corresponding to the socket 601 has a bevel, and the head end of the light-shielding sleeve 24 has a conical surface.

[0065] In this embodiment, as the insert 8, carrying the wedge lens 5, enters the light transmission tube 6 through the insertion port 601, a section of the inclined surface on the insert 8 contacts the conical surface at the head end of the light shield 24 and squeezes the conical surface to retract, thereby driving the light shield 24 to retract and further compress the second spring 25.

[0066] When the insert 8 with the wedge lens 5 exits from the socket 601, the second spring 25 can drive the light shield 24 to close the socket 601, so that the interior of the light transmission tube 6 forms a nearly complete cylindrical channel for the light path to be output along the predetermined route.

[0067] As a further embodiment of the present invention, in order to facilitate the placement of the light-shielding sleeve 24 and the second spring 25 into the elastic cavity 603, the light transmission tube 6 is divided into two parts, namely the first tube body 61 and the second tube body 62.

[0068] The second tube body 62 has a sleeve 602 inside, the tail end of the light shield 24 is slidably fitted into the sleeve 602, and the head end of the light shield 24 has a step formed on the outside, the step divides the outer wall of the light shield 24 into a coarse diameter section and a fine diameter section.

[0069] The conical surface is set at the end of the coarse diameter section, the second spring 25 is sleeved on the outside of the fine diameter section, and one end of the second spring 25 abuts against the step, and the other end of the second spring 25 abuts against the tail end face of the elastic cavity 603. The tail end of the fine diameter section is slidably fitted into the sleeve 602.

[0070] The insertion port 601 is provided on the first tube body 61, and one side of the insertion port 601 is flush with the head end face of the elastic cavity 603. Lugs are provided on the outer walls of both the first tube body 61 and the second tube body 62.

[0071] In this embodiment, the first tube 61 and the second tube 62 can be fixedly connected by the lug to form a complete optical transmission tube 6.

[0072] Note that one side of the wedge lens 5 is a flat surface and is parallel to the head end face of the elastic cavity 603. The other side of the wedge lens 5 is parallel to the inclined surface on the insert 8. A through hole is formed on the insert 8, and the wedge lens 5 is fitted into the through hole. Both sides of the wedge lens 5 are lower than the insert 8. In this way, the light shield 24 can be driven to move and reset by the interaction between the insert 8 and the conical surface at the head end of the light shield 24. The wedge lens 5 will not rub directly against the light shield 24, thus ensuring that the surface of the wedge lens 5 is not worn.

[0073] As a further embodiment of the present invention, the electromagnetic structure includes two electromagnetic actuators 11 mounted on the extension arm 4, a slider 12 is provided between the two electromagnetic actuators 11, the slider 12 is fixedly connected to the insertion piece 8, and the slider 12 is also slidably engaged with the extension arm 4.

[0074] Two pins 7 on one row of pins 7 correspond to two locking pins 16 on one of the docking brackets 15 via two wiring terminals 13;

[0075] The two pins 7 on the other row of pins 7 correspond to the two locking pins 16 on another docking bracket 15 through two other wiring terminals 13;

[0076] Two docking frames 15 are set at different heights and are both connected to tie rods 17, which are connected to the plug-in parts 8.

[0077] In this embodiment, two electromagnetic actuators 11 drive the slider 12 to move, thereby driving the insertion piece 8 and the wedge lens 5 fixed on the insertion piece 8 to enter and exit the insertion port 601.

[0078] During the process of the insertion component 8 driving the wedge lens 5 into and out of the insertion port 601, the pull rod 17 also drives the two docking frames 15 to rise and fall. The two locking feet 16 on the descending docking frame 15 are engaged with the corresponding two terminals 13, which energize them and ultimately energize the two pins 7 on the corresponding row. Meanwhile, the two locking feet 16 on the rising docking frame 15 are disengaged from the other two terminals 13 and de-energized.

[0079] As a further embodiment of the present invention, a pin module 10 is installed on each side of the relay body 1, a wiring terminal 13 is disposed on the pin module 10, and the pin module 10 is connected to the PIN pin 7.

[0080] Each pin module 10 is provided with a row of terminals 13. The terminals 13 that mate with the pins 16 are located at the beginning and end of the same row of terminals 13, and the remaining terminals 13 are connected to the connector 14.

[0081] A central module 9 is installed at the center of the relay body 1. Two sets of guide posts 902 are fixedly installed on the central module 9, and guide holes that slide with the guide posts 902 are opened on the docking frame 15.

[0082] In this embodiment, the first and last two terminals 13 of one row of terminals 13 correspond to PIN1 and PIN5 of PIN pin 7, respectively, and the first and last two terminals 13 of the other row of terminals 13 correspond to PIN6 and PIN10 of PIN pin 7, respectively.

[0083] PIN2, PIN3, and PIN4 connect to the three connectors 14 on one side, while PIN7, PIN8, and PIN9 connect to the three connectors 14 on the other side.

[0084] The guide post 902 and guide hole are designed to allow the docking frame 15 on both sides to move up and down.

[0085] As a further embodiment of the present invention, the central module 9 is provided with a pull hole 903, the pull rod 17 is slidably engaged with the pull hole 903, a stop member 19 is fixedly installed on the pull rod 17, and the central module 9 is provided with a receiving hole 901.

[0086] A first spring 18 is provided in the receiving hole 901. The first spring 18 is sleeved on the outside of a section of the pull rod 17, and one end of the first spring 18 abuts against the inner wall of the receiving hole 901, while the other end of the first spring 18 abuts against the stop member 19.

[0087] In this embodiment, the stop 19 and the receiving hole 901, along with the first spring 18 in the receiving hole 901, can keep the pull rod 17 always tending to move away from the eight-hole tube. This ensures that when the slider 12 moves away from the forming end point of the eight-hole tube (i.e., the wedge lens 5 is outside the light transmission tube 6), PIN1 and PIN5 remain energized, while PIN6 and PIN10 remain de-energized. When the electromagnetic driver 11 drives the wedge lens 5 to be inside the light transmission tube 6 via the slider 12 and the insertion member 8, PIN1 and PIN5 switch to the de-energized state, while PIN6 and PIN10 switch to the energized state.

[0088] As a further embodiment of the present invention, a protruding post 1702 is fixedly provided at one end of the pull rod 17 near the light transmission tube 6, an insertion channel 801 is provided on the insertion member 8, and straight grooves 802 are provided on both sides of the insertion member 8. The straight grooves 802 are connected to the insertion channel 801, and the protruding post 1702 is slidably embedded in the straight grooves 802.

[0089] In this embodiment, during the process of the insert 8 carrying the wedge lens 5 entering the light transmission tube 6 through the insertion port 601, in the initial stage, because the first spring 18 always gives the pull rod 17 a tendency to move away from the eight-hole tube, the protrusion 1702 slides in the straight groove 802, and the pull rod 17 also slides in the insertion channel 801, so that the pull rod 17 remains stationary.

[0090] When the protrusion 1702 reaches the end of the straight groove 802, as the insertion member 8 continues to insert the wedge lens 5 into the light transmission tube 6, the insertion member 8 will drive the protrusion 1702 to move closer to the light transmission tube 6, thereby driving the pull rod 17 to move closer to the light transmission tube 6 and further compressing the first spring 18; in this way, the two docking frames 15 will rise and fall, so that the two locking feet 16 on the descending docking frame 15 will engage with the corresponding two wiring terminals 13, and the two locking feet 16 on the rising docking frame 15 will disengage from the other two wiring terminals 13 and disconnect the power.

[0091] As a further embodiment of the present invention, two sets of first fixing posts 20 and second fixing posts 21 are fixed on the pull rod 17, with the first fixing posts 20 and the second fixing posts 21 distributed vertically.

[0092] The first fixed post 20 and the second fixed post 21 are located on both sides of the tie rod 17. One end of the first fixed post 20 is rotatably connected to the upper end of one set of hinge rods 22, and the lower end of the hinge rod 22 is connected to the docking frame 15 on the same side through a set of extension posts 23.

[0093] One end of the second fixed column 21 is rotatably connected to the lower end of another set of hinge rods 22, and the upper end of the hinge rods 22 is connected to the docking frame 15 on the same side through another set of extension columns 23.

[0094] In detail, the hinge rod 22 is rotatably connected to the extension column 23, and the extension column 23 is fixed on the docking frame 15.

[0095] In this embodiment, when the pull rod 17 approaches the light transmission tube 6, the first fixed column 20 drives the extension column 23 on the same side to move upward through the hinge rod 22 on the same side, thereby driving the docking frame 15 on that side to rise.

[0096] The second fixed column 21 drives the extension column 23 on the same side to move downward through the hinge 22 on that side, thereby causing the docking frame 15 on that side to descend.

[0097] As a further embodiment of the present invention, in order to facilitate and quickly insert the pull rod 17 into the pull hole 903, the pull rod 17 is configured as a two-section structure, and the two sections are connected by a fixing piece 1701.

[0098] In this embodiment, the two ends of the pull rod 17 can be inserted into the pull hole 903 by the fixing piece 1701, and then connected together by the fixing piece 1701 to form the pull rod 17 as a whole.

[0099] The above embodiments are exemplary and not restrictive. Therefore, any technical solutions that can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention are included within the scope of the present invention.

Claims

1. A small-sized one-to-two mechanical optical switch, comprising a relay body, wherein an extension arm is provided on the relay body, characterized in that, The extension arm is connected to the wedge lens. A four-hole tube is set on each side of the wedge lens. A single-fiber collimator is installed on one of the four-hole tubes, and a dual-fiber collimator is installed on the other four-hole tube. A light transmission tube is set between the two four-hole tubes. A light-shielding sleeve is installed inside the light transmission tube, and an insertion port adapted to a wedge lens is provided on one side of the light transmission tube. The relay body has multiple pins arranged in two rows, and the extension arm has an electromagnetic structure for driving the wedge lens into and out of the socket. When the wedge lens enters the socket, two pins on one row of pins are de-energized, while two pins on the other row of pins are energized. When the wedge lens is removed from the socket, two pins on one row of pins are energized, two pins on the other row of pins are de-energized, and the light shield seals the socket. The electromagnetic structure is connected to the fitting, and the wedge-shaped lens is fitted onto the fitting. The light transmission tube has an elastic cavity and a sleeve that are interconnected inside. The light shield is slidably disposed in the elastic cavity and the sleeve. A second spring is also disposed in the elastic cavity to connect the light shield and the inner wall of the light transmission tube. The fitting has a beveled surface at one end corresponding to the insertion port, and the head end of the light-shielding sleeve has a conical surface. One side of the wedge lens is flat and parallel to the head end face of the elastic cavity, while the other side of the wedge lens is parallel to the beveled surface on the fitting. A through hole is formed on the fitting, and the wedge lens is fitted into the through hole. Both sides of the wedge lens are lower than the fitting. The light-shielding sleeve is driven to move and reset by the interaction between the fitting and the conical surface at the head end of the light-shielding sleeve. The electromagnetic structure includes two electromagnetic actuators mounted on the extension arm, a slider is provided between the two electromagnetic actuators, the slider is fixedly connected to the insertion piece, and the slider is also slidably engaged with the extension arm. Two pins on one row of pins correspond to two locking pins on one of the mating brackets via two wiring terminals; Two pins on the other row of pins correspond to two locking pins on another connector via two additional terminals. The two docking frames are set at different heights and are both connected to pull rods, which are connected to the plug-in components. During the process of the plug-in components moving the wedge lens in and out of the socket, the pull rods also move the two docking frames up and down. When the docking frame is lowered, two locking pins on it engage with the corresponding two terminals, energizing them and ultimately energizing the two pins on the corresponding row. When the docking frame is raised, two locking pins on it disengage from the other two terminals, de-energizing them. A protruding post is fixedly provided at one end of the pull rod near the light transmission tube. An insertion channel is provided on the insertion member, and straight grooves are provided on both sides of the insertion member. The straight grooves are connected to the insertion channel, and the protruding post is slidably embedded in the straight grooves.

2. The small-sized one-to-two mechanical optical switch according to claim 1, characterized in that, The optical transmission tube consists of two parts, namely a first tube body and a second tube body; The interior of the second tube has a channel, the tail end of the light-shielding sleeve is slidably fitted into the channel, and the outer end of the head end of the light-shielding sleeve has a step, which divides the outer wall of the light-shielding sleeve into a coarse diameter section and a fine diameter section. The conical surface is set at the end of the coarse diameter section, the second spring is sleeved on the outside of the fine diameter section, and one end of the second spring abuts against the step, the other end of the second spring abuts against the tail end face of the elastic cavity, and the tail end of the fine diameter section slides into the sleeve. The insertion port is located on the first tube body, with one side of the insertion port flush with the head end face of the elastic cavity. Lugs are provided on the outer walls of both the first and second tube bodies.

3. A small-sized one-to-two mechanical optical switch according to claim 1, characterized in that, A pin module is installed on each side of the relay body, and the wiring terminals are set on the pin module, and the pin module is connected to the PIN pin. Each pin module is equipped with a row of terminals. The terminals that mate with the pins are located at the beginning and end of the same row of terminals, and the remaining terminals are connected to the connector. A central module is installed at the center of the relay body. Two sets of guide posts are fixedly installed on the central module, and guide holes that slide with the guide posts are opened on the docking frame.

4. A small-sized one-to-two mechanical optical switch according to claim 3, characterized in that, The central module has a pull hole, the pull rod slides in the pull hole, a stop is fixedly installed on the pull rod, and the central module has a receiving hole. A first spring is provided in the receiving hole. The first spring is sleeved on the outside of a section of the pull rod, and one end of the first spring abuts against the inner wall of the receiving hole, while the other end of the first spring abuts against the stop.

5. A small-sized one-to-two mechanical optical switch according to claim 1, characterized in that, The tie rod is fixed with two sets of first fixing posts and second fixing posts, which are distributed vertically. Furthermore, the first fixed post and the second fixed post are located on both sides of the tie rod. One end of the first fixed post is rotatably connected to the upper end of one set of hinge rods, and the lower end of the hinge rod is connected to the docking frame on the same side through a set of extension posts. One end of the second fixed column is rotatably connected to the lower end of another set of hinge rods, and the upper end of the hinge rods is connected to the docking frame on the same side through another set of extension columns.

6. A small-sized one-to-two mechanical optical switch according to claim 1, characterized in that, The pull rod has a two-section structure, and the two sections are connected by a fixing plate.

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