Optical fiber switching protection system suitable for optical fiber switching protection equipment

Abstract

The invention discloses an optical fiber switching protection system suitable for optical fiber switching protection equipment. The optical fiber switching protection system comprises a switch box; the input connector and the output connector group are arranged on two opposite sides of the switch box; the guide prism is positioned between the input joint and the output joint group; the driving structure drives the guide prism to rotate; the regulation and control device is electrically connected with the driving structure; wherein the output connector set comprises a main output connector, a first auxiliary output connector and a second auxiliary output connector, a first photosensitive film and a second photosensitive film which can be subjected to photosensitive deformation are arranged in the main output connector and the first auxiliary output connector respectively, and a contact switch is arranged on the outer side of the first photosensitive film so that the contact switch can be switched off when the first photosensitive film deforms outwards; a trigger structure is arranged on the outer side of the second light sensing film; the regulation and control device is electrically connected with the contact switch, and the regulation and control device is in linkage with the trigger structure. According to the invention, automatic switching of three levels of optical paths can be completed, intervention steps of operation and maintenance personnel are reduced, and communication interruption caused by faults of a single standby optical path is avoided.

Description

Technical Field

[0001] This application relates to the field of optical fiber communication technology, and in particular to an optical fiber switching protection system suitable for optical fiber switching protection equipment. Background Technology

[0002] In optical fiber communication systems, optical fiber switching protection devices are crucial components for the stable transmission of faulty optical signals. Their core function is to quickly switch the optical signal to the backup optical path when the primary optical path fails, thus preventing communication interruptions.

[0003] In the prior art, such as the optical fiber protection device switching switch with application number 202020167357.X, the optical path switching is achieved through an optical fiber switching switch box, an optical fiber input connector, multiple sets of optical fiber output connectors, and a switching adjustment mechanism (including a ring adjustment frame, a prism, a light-blocking plate, and a light-transmitting frame), which solves the problem that traditional equipment needs to be disassembled before it can be tested.

[0004] However, the above patent still has limitations: (1) Optical path switching relies on the rotation of the ring adjustment frame driven by the servo motor. It lacks an autonomous trigger adjustment mechanism based on the optical path fault status. Only when the operator actively discovers the optical path fault can the optical path be switched by controlling the servo motor. It is limited to the two-level switching of the main and backup output connectors and cannot realize automated multi-level switching. (2) Its detection function is only for the optical signal of the fiber optic input and output connectors. It does not perform real-time perception and feedback on the fault status of the output connector (such as optical path interruption). It cannot directly trigger the switching logic based on the transmission interruption fault, resulting in limited switching response efficiency. Summary of the Invention

[0005] This application aims to at least partially solve one of the technical problems in the aforementioned technologies.

[0006] To achieve the above objectives, the first aspect of this application proposes an optical fiber switching protection system suitable for optical fiber switching protection equipment, comprising: a switch box; an input connector and an output connector group disposed on opposite sides of the switch box; a guide prism located between the input connector and the output connector group; a drive structure for driving the guide prism to rotate; and a control device electrically connected to the drive structure; wherein the output connector group includes a main output connector, a first auxiliary output connector, and a second auxiliary output connector, and the main output connector and the first auxiliary output connector are respectively provided with a first photosensitive film and a second photosensitive film that are photosensitive and deformable, and a contact switch is provided on the outside of the first photosensitive film to disconnect the contact switch when the first photosensitive film deforms outward; a trigger structure is provided on the outside of the second photosensitive film; the control device is electrically connected to the contact switch and is linked with the trigger structure, and the control device is configured to control the rotation angle of the drive structure according to the on / off state of the contact switch and the trigger state of the trigger structure, so as to switch the input optical path to the corresponding output connector in the output connector group.

[0007] In addition, the fiber optic switching protection system for fiber optic switching protection equipment proposed above in this application may also have the following additional technical features:

[0008] As a further description of the above technical solution: the driving structure includes a voice coil motor, a rack, a gear, and a rack sleeve, wherein the voice coil motor is electrically connected to a power source; the rack is disposed at the moving end of the linear drive of the voice coil motor, and the rack is slidably embedded in the rack sleeve; the gear is coaxially disposed with the rotation axis of the guide prism, and the gear is meshed with the rack.

[0009] As a further description of the above technical solution: the guiding prism includes a first mirror, a second mirror, a third mirror, and a fourth mirror connected in sequence, wherein the first mirror and the third mirror are opposite to each other and arranged in parallel; the second mirror and the fourth mirror are opposite to each other and arranged in parallel.

[0010] As a further description of the above technical solution: the contact switch includes a first connecting piece, a second connecting piece, and a connecting post, wherein the first connecting piece is disposed outside the main output connector; the second connecting piece is movably disposed outside the first connecting piece via a guide post, and the first connecting piece is connected to the first photosensitive film via the connecting post; wherein conductive contacts are provided on the opposing surfaces of the first connecting piece and the second connecting piece.

[0011] As a further description of the above technical solution: the control device includes a first lever, a second lever, and a sliding rheostat, wherein the sliding rheostat is electrically connected to the driving structure; one end of the elastically resettable first lever is connected to the sliding contact of the sliding rheostat, and the other end is engaged with the second lever; the second lever is provided with a limiting post to restrict its rotation range; wherein, when the second photosensitive film deforms outward, the triggering structure avoids the second lever; when the second photosensitive film is reset, the triggering structure hooks the second lever to disengage the first lever from the second lever, and the first lever drives the sliding contact to move under the reset action.

[0012] As a further description of the above technical solution: the triggering structure includes a movable plate, a hook, and a spring sheet, wherein the movable plate is movably disposed outside the first auxiliary output connector via a guide rod; the center of the second photosensitive film is connected to the movable plate; the hook is rotatably disposed on the movable plate and is squeezed by the spring sheet to abut against the end of the second lever.

[0013] As a further description of the above technical solution: a torsion spring for driving reset is sleeved on the rotating shaft of the first lever.

[0014] As a further description of the above technical solution: one end of the first lever is provided with a shift fork head, and the sliding contact is embedded in the shift fork head; the other end of the first lever is provided with a first hook foot, and the first hook foot is hooked to a second hook foot on the second lever.

[0015] As a further description of the above technical solution: a third hook is provided at the end of the second lever away from the second hook foot, and when the second photosensitive film deforms outward, the hook abuts against the third hook foot.

[0016] According to the fiber optic switching protection system applicable to fiber optic switching protection equipment of this application, by setting up a multi-level redundancy design of a main output connector, a first auxiliary output connector, and a second auxiliary output structure in the output connector group, and combining the linkage mechanism of the first photosensitive film, the second photosensitive film, and the control device, it can realize automatic multi-level switching under fault conditions. That is, during normal operation, the optical path is transmitted through the main output connector; when the main output structure fails, the first photosensitive film resets to connect the contact switch, and the control device drives the guide prism to switch the optical path to the first auxiliary output connector; if the first auxiliary output connector further fails, the second photosensitive film resets to trigger the control device to adjust the drive structure and switch the optical path to the second auxiliary output connector. This system can complete the automatic switching of the three-level optical path without manual intervention, which not only reduces the intervention steps of operation and maintenance personnel, but also effectively avoids communication interruption caused by the failure of a single backup optical path.

[0017] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0019] Figure 1 This is a schematic diagram of the structure of an optical fiber switching protection system applicable to an optical fiber switching protection device according to an embodiment of this application;

[0020] Figure 2 This is a schematic diagram of the structure of an optical fiber switching protection system applicable to an optical fiber switching protection device according to another embodiment of this application;

[0021] Figure 3 This is a schematic diagram of the structure of an optical fiber switching protection system applicable to an optical fiber switching protection device according to another embodiment of this application;

[0022] Figure 4 This is a schematic diagram of a driving structure according to an embodiment of this application;

[0023] Figure 5 This is a schematic diagram of the structure of a contact switch according to an embodiment of this application;

[0024] Figure 6 This is a schematic diagram of the structure of a control device according to an embodiment of this application;

[0025] Figure 7 This is a schematic diagram of a trigger structure according to an embodiment of this application;

[0026] Figure 8 This is a schematic diagram of the structure of a guide prism according to an embodiment of this application;

[0027] As shown in the figure:

[0028] 100. Switch box; 200. Input connector; 300. Output connector assembly; 310. Main output connector; 301. Contact switch; 320. First auxiliary output connector; 302. Triggering structure; 3021. Moving plate; 3022. Hook; 3023. Spring; 330. Second auxiliary output connector; 400. Guide prism; 410. First mirror; 420. Second mirror; 430. Third mirror; 440. Fourth mirror; 500. Drive structure 501. Power supply; 510. Voice coil motor; 530. Gear; 520. Rack; 540. Rack sleeve; 601. First photosensitive film; 602. Second photosensitive film; 700. Control device; 730. Sliding rheostat; 731. Sliding contact; 710. First lever; 712. Fork head; 711. First hook foot; 713. Torsion spring; 720. Second lever; 721. Limiting post; 722. Second hook foot; 723. Third hook foot. Detailed Implementation

[0029] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0030] The fiber optic switching protection system applicable to fiber optic switching protection devices according to embodiments of this application will now be described with reference to the accompanying drawings.

[0031] like Figures 1 to 3 As shown, the fiber optic switching protection system applicable to fiber optic switching protection equipment in this application embodiment may include a switch box 100, an input connector 200 and an output connector group 300 disposed on opposite sides of the switch box 100, a guide prism 400 located between the input connector 200 and the output connector group 300, a drive structure 500 for driving the guide prism 400 to rotate, and a control device 700 electrically connected to the drive structure 500.

[0032] The output connector group 300 includes a main output connector 310, a first auxiliary output connector 320, and a second auxiliary output connector 330. The main output connector 310 and the first auxiliary output connector 320 are respectively provided with a first photosensitive film 601 and a second photosensitive film 602 that can be photosensitively deformed. A contact switch 301 is provided on the outside of the first photosensitive film 601 to disconnect the contact switch 301 when the first photosensitive film 601 deforms outward. A trigger structure 302 is provided on the outside of the second photosensitive film 602.

[0033] The control device 700 is electrically connected to the contact switch 301, and the control device 700 is linked with the trigger structure 302. The control device 700 is configured to control the rotation angle of the drive structure 500 according to the on / off state of the contact switch 301 and the trigger state of the trigger structure 302, so as to switch the input optical path to the corresponding output connector in the output connector group 300.

[0034] The control device 700 is configured to a first state, a second state, and a third state.

[0035] In the first state, the optical path passes through the main output connector 310, the contact switch 301 is disconnected, and the control device 700 is not powered.

[0036] In the second state, the main output connector 310 malfunctions, and the optical path cannot be transmitted within the main output structure. The first photosensitive film 601 is reset and the contact switch 301 is connected. The drive structure 500 drives the guide prism 400 to transmit the optical path to the first auxiliary output connector 320. The second photosensitive film 602 deforms outward and the control device 700 is powered on, but the trigger structure 302 does not trigger the control device 700.

[0037] In the third state, the first output connector 320 malfunctions, and the optical path cannot be transmitted within the first output connector 320. The second photosensitive film 602 is reset, triggering the adjustment trigger end of the control device 700 to change the current magnitude of the drive structure 500, forcing the rotation angle of the drive structure 500 to change, thereby causing the guide prism 400 to transmit the optical path to the second output connector 330.

[0038] To clearly illustrate the previous embodiment, in one embodiment of this application, as follows: Figure 4 As shown, the drive structure 500 includes a voice coil motor 510, a rack 520, a gear 530, and a rack sleeve 540.

[0039] Among them, the voice coil motor 510 is electrically connected to the power supply 501, the rack 520 is disposed at the moving end of the linear drive of the voice coil motor 510, and the rack 520 is slidably embedded in the rack sleeve 540. The gear 530 is coaxially disposed with the rotating shaft of the guide prism 400, and the gear 530 is meshed with the rack 520.

[0040] It should be noted that the voice coil motor 510 has the advantages of small size and fast response, making it more suitable for the needs of fiber optic switching equipment.

[0041] Understandably, due to the special structure of the voice coil motor 510, its working heat source is based on the Lorentz force law. When current passes through the coil placed in the magnetic field, a force perpendicular to the direction of the current and the direction of the magnetic field is generated, thereby driving the coil to make linear motion. According to the Ampere force principle, the stroke thrust of the voice coil motor 510 is proportional to the input current, i.e., F=B×L×I, where B is the air gap magnetic induction intensity, L is the coil length, and I is the current. It is known that without changing the air gap magnetic induction intensity and the coil length, the linear stroke of the voice coil motor 510 can be controlled by controlling the magnitude of the current.

[0042] To clearly illustrate the previous embodiment, in one embodiment of this application, as follows: Figure 6 and Figure 7 As shown, the control device 700 includes a first lever 710, a second lever 720, and a sliding rheostat 730.

[0043] The sliding rheostat 730 is electrically connected to the drive structure 500. One end of the elastically resettable first lever 710 is connected to the sliding contact 731 of the sliding rheostat 730 (specifically, a torsion spring 713 for drive reset is sleeved on the rotation shaft of the first lever 710), and the other end is engaged with the second lever 720. The second lever 720 is provided with a limiting post 721 to limit its rotation range.

[0044] When the second photosensitive film 602 deforms outward, the trigger structure 302 avoids the second lever 720; when the second photosensitive film 602 resets, the trigger structure 302 hooks the second lever 720 so that the first lever 710 is disengaged from the second lever 720, and the first lever 710 drives the sliding contact 731 to move under the reset action.

[0045] Specifically, when the main output connector 310 is working normally, the input connector 200 transmits the optical signal through the guide prism 400 and then transmits the optical signal to the main output connector 310. The optical signal continuously irradiates the first photosensitive film 601. At this time, the first photosensitive film 601 changes shape, so that the contact switch 301 is in the open state, that is, the control device 700 is in the first state at this time.

[0046] When the main output connector 310 fails to transmit the optical signal normally due to its own malfunction (such as optical path interruption, loose connector, etc.), the first photosensitive film 601 loses its illumination, automatically resets, and switches the contact switch 301 from open to connected. After the contact switch 301 is connected, the circuit is open, providing the initial current to the voice coil motor 510, which drives the guide prism 400 to rotate, so that the optical signal is transmitted to the first auxiliary output connector 320. Under the continuous illumination of the optical signal in the first auxiliary output connector 320, the second photosensitive film 602 deforms, synchronously driving the trigger structure 302 to move outward and avoid the second lever 720. At this time, the second lever 720 is blocked by the limit post 721 and remains in its original position, and is locked with the first lever 710. The resistance of the sliding rheostat 730 in the control device 700 is stabilized, the voice coil motor 510 maintains the current, the angle of the guide prism 400 remains unchanged, and the optical path is maintained in the first auxiliary output connector 320. That is, at this time, the control device 700 is in the second state.

[0047] When the optical signal is further interrupted at the first output connector 320, the second photosensitive film 602 loses illumination and resets. When the film resets, it drives the trigger structure 302 to hook the end of the second lever 720, causing the second lever 720 to rotate around its own axis. The limiting post 721 loses its constraint on the second lever 720, causing the second lever 720 to disengage from the first lever 710. The first lever 710 rotates under its own elastic reset action, thereby driving the sliding contact 731 of the sliding rheostat 730 to move, thereby changing the current in the circuit. This causes the voice coil motor 510 to drive the prism 400 to rotate, so as to transmit the optical signal to the second output connector 330. At this time, the control device 700 is in the third state.

[0048] In one embodiment of this application, such as Figure 7 As shown, the trigger structure 302 includes a movable plate 3021, a hook 3022, and a spring 3023.

[0049] The movable plate 3021 is movably disposed outside the first output connector 320 via a guide rod. The center of the second photosensitive film 602 is connected to the movable plate 3021. The hook 3022 is rotatably disposed on the movable plate 3021 and is pressed by the spring piece 3023 to abut against the end of the second lever 720.

[0050] To clearly illustrate the previous embodiment, in one embodiment of this application, a fork head 712 is provided at one end of the first lever 710, and a sliding contact 731 is embedded in the fork head 712. A first hook foot 711 is provided at the other end of the first lever 710. The first hook foot 711 is hooked to the second hook foot 722 on the second lever 720. A third hook foot 723 is provided at the end of the second lever 720 away from the second hook foot 722. When the second photosensitive film 602 deforms outward, the hook 3022 abuts against the third hook foot 723.

[0051] It should be noted that when the first output connector 320 is connected to the optical path, the optical signal causes the second photosensitive film 602 to deform outward. Since the center of the second photosensitive film 602 is fixed to the moving plate 3021, the thrust generated by the deformation drives the moving plate 3021 to slide along the guide rod toward the second lever 720. During the sliding process of the moving plate, the hook 3022 is simultaneously driven to move closer to the third hook foot 723 of the second lever 720. Due to the elastic compression of the spring piece 3023, the hook end of the hook 3022 rotates along the outer edge of the third hook foot 723 until the hook end of the hook 3022 exceeds the third hook foot 723 and is embedded in the third hook foot 723 under the compression of the spring piece 3023.

[0052] At this time, since the second lever 720 is blocked by the limit post 721 and cannot rotate, the second lever 720 and the first lever 710 remain stably connected. Since the first lever 710 cannot rotate, the shift fork head 712 remains stationary, the sliding contact 731 of the sliding rheostat 730 is fixed in position, the resistance value connected to the circuit remains unchanged, the current of the voice coil motor 510 is stable, the guide prism 400 angle is fixed, and the optical path continues to remain within the first output connector 320.

[0053] When the optical path of the first output structure is interrupted, the second photosensitive film 602 drives the trigger structure 302 to reset. Then, the hook 3022 pulls the third hook foot 723 in the opposite direction, causing the second lever 720 to rotate. As a result, the first lever 710 disengages from the hook between the second lever 720 and rotates under the reset action of the torsion spring 713. This causes the shift fork head 712 to push the sliding contact 731 to move on the sliding rheostat 730, changing the resistance value in the circuit. This causes the input current of the voice coil motor 510 to change, thereby guiding the rotation of the prism 400 to transmit the optical signal to the second output connector 330.

[0054] In addition, the first photosensitive film 601 and the second photosensitive film 602 are made of photosensitive shape memory polymer materials, that is, polymer materials that can be triggered by light signals to change shape and can recover to their initial shape after the light signals are removed.

[0055] As one possibility, the first photosensitive film 601 and the second photosensitive film 602 may be made of azobenzene-based photosensitive shape memory polymer materials, which will undergo cis-trans isomerization under the illumination of a specific wavelength signal, resulting in a change in the molecular chain arrangement, thereby causing the film to undergo outward stretching or bending deformation.

[0056] As another possible scenario, the first photosensitive film 601 and the second photosensitive film 602 are shape memory polymer materials containing photocrosslinking groups. Photocrosslinking monomers are introduced into the molecular chain of the material, and under normal conditions, the film is in a pre-stretched "temporary form." When illuminated by a light signal, the photocrosslinking groups undergo a crosslinking reaction, and the molecular chain is fixed in a "deformed form" (i.e., bulging outwards). When there is no light, the crosslinking bonds break, and the molecular chain returns to its initial form before pre-stretching, thus restoring the film to its original state. This material has high mechanical strength, and when the film deforms, it can provide sufficient mechanical force to trigger the contact switch 301 to open or close, or to drive the trigger structure 302 to move, avoiding malfunction due to excessively soft material.

[0057] It is understandable that the first photosensitive film 601 and the second photosensitive film 602 can absorb light through diffuse reflection within the corresponding output connector, or the inner wall of the corresponding connector can be smoothly polished to absorb light through reflection of the light surface.

[0058] like Figure 8 As shown, the guide prism 400 includes a first mirror 410, a second mirror 420, a third mirror 430, and a fourth mirror 440 connected in sequence.

[0059] The first mirror 410 and the third mirror 430 are arranged opposite to each other and parallel to each other, while the second mirror 420 and the fourth mirror 440 are arranged opposite to each other and not parallel to each other.

[0060] It should be noted that, in the first state, the first mirror 410 is perpendicular to the optical path, so that the optical path passes through the first mirror 410 and the third mirror 430, and transmits the optical path in a straight line to the main output connector 310; in the second state, the second mirror 420 is perpendicular to the input optical path, and after passing through the second mirror 420, the optical path is transmitted to the first auxiliary output connector 320 via the fourth mirror 440; in the third state, the fourth mirror 440 is perpendicular to the input optical path, and the optical path is transmitted to the second auxiliary output connector 330 via the second mirror 420.

[0061] like Figure 5 As shown, the contact switch 301 includes a first connecting piece 3011, a second connecting piece 3012, and a connecting post 3013.

[0062] The first connecting piece 3011 is disposed outside the main output connector 310, and the second connecting piece 3012 is movably disposed outside the first connecting piece 3011 via a guide post. The first connecting piece 3011 is connected to the first photosensitive film 601 via a connecting post 3013. The opposing surfaces of the first connecting piece 3011 and the second connecting piece 3012 are provided with conductive contacts.

[0063] It should be noted that when the first photosensitive film 601 deforms under light, the first connecting piece is pushed outward by the connecting post, thereby separating the first connecting piece from the second connecting piece and disconnecting the contact switch 301. When the first photosensitive film 601 resets, the first connecting piece and the second connecting piece reconnect, thereby connecting the contact switch 301.

[0064] In summary, the fiber optic switching protection system for fiber optic switching protection devices according to the embodiments of this application, through the multi-level redundancy design of the output connector group 300 consisting of a main output connector 310, a first auxiliary output connector 320, and a second auxiliary output structure, and combined with the linkage mechanism of the first photosensitive film 601, the second photosensitive film 602, and the control device 700, can achieve automated multi-level switching under fault conditions. That is, during normal operation, the optical path is transmitted through the main output connector 310; when the main output structure fails, the first photosensitive film 601 resets to connect the contact switch 301, and the control device 700 drives the guide prism 400 to switch the optical path to the first auxiliary output connector 320; if the first auxiliary output connector 320 further fails, the second photosensitive film 602 resets to trigger the control device 700 to adjust the drive structure 500, switching the optical path to the second auxiliary output connector 330. This system can complete the automatic switching of the three-level optical path without manual intervention, which not only reduces the intervention steps of maintenance personnel, but also effectively avoids communication interruption caused by the failure of a single backup optical path.

[0065] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0066] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0067] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A fiber optic switching protection system suitable for fiber optic switching protection equipment, characterized in that, include: Switch box (100); Input connectors (200) and output connector groups (300) are disposed on opposite sides of the switch box (100). A guide prism (400) located between the input connector (200) and the output connector group (300). A drive structure (500) that drives the guide prism (400) to rotate. A control device (700) electrically connected to the drive structure (500). The output connector group (300) includes a main output connector (310), a first auxiliary output connector (320), and a second auxiliary output connector (330). The main output connector (310) and the first auxiliary output connector (320) are respectively provided with a first photosensitive film (601) and a second photosensitive film (602) that can be photosensitively deformed. A contact switch (301) is provided on the outside of the first photosensitive film (601) to disconnect the contact switch (301) when the first photosensitive film (601) deforms outward. A trigger structure (302) is provided on the outside of the second photosensitive film (602). The control device (700) is electrically connected to the contact switch (301), and the control device (700) is linked with the trigger structure (302). The control device (700) is configured to control the rotation angle of the drive structure (500) according to the on / off state of the contact switch (301) and the trigger state of the trigger structure (302), so as to switch the input optical path to the corresponding output connector in the output connector group (300).

2. The fiber optic switching protection system for fiber optic switching protection equipment according to claim 1, characterized in that, The drive structure (500) includes a voice coil motor (510), a rack (520), a gear (530), and a rack sleeve (540), wherein the voice coil motor (510) is electrically connected to a power supply (501); The rack (520) is disposed at the moving end of the linear drive of the voice coil motor (510), and the rack (520) is slidably embedded in the rack sleeve (540); The gear (530) is coaxially arranged with the rotation axis of the guide prism (400), and the gear (530) is meshed with the rack (520).

3. The fiber optic switching protection system for fiber optic switching protection equipment according to claim 1, characterized in that, The guiding prism (400) includes a first mirror (410), a second mirror (420), a third mirror (430), and a fourth mirror (440) connected in sequence, wherein, The first mirror (410) and the third mirror (430) are arranged opposite to each other and parallel to each other; The second mirror (420) and the fourth mirror (440) are arranged opposite to each other and are not parallel.

4. The fiber optic switching protection system for fiber optic switching protection equipment according to claim 1, characterized in that, The contact switch (301) includes a first connecting piece (3011), a second connecting piece (3012), and a connecting post (3013), wherein, The first connecting piece (3011) is disposed outside the main output connector (310); The second connecting piece (3012) is movably disposed outside the first connecting piece (3011) via a guide post, and the first connecting piece (3011) is connected to the first photosensitive film (601) via a connecting post (3013); The first connecting piece (3011) and the second connecting piece (3012) have conductive contacts on their opposite surfaces.

5. The fiber optic switching protection system for fiber optic switching protection equipment according to claim 1, characterized in that, The control device (700) includes a first lever (710), a second lever (720), and a sliding rheostat (730), wherein, The sliding rheostat (730) is electrically connected to the driving structure (500); One end of the elastically resettable first lever (710) is connected to the sliding contact (731) of the sliding rheostat (730), and the other end is engaged with the second lever (720); The second lever (720) is provided with a limiting post (721) to restrict its range of rotation; When the second photosensitive film (602) deforms outward, the trigger structure (302) avoids the second lever (720); when the second photosensitive film (602) resets, the trigger structure (302) hooks the second lever (720) so that the first lever (710) is disengaged from the second lever (720), and the first lever (710) drives the sliding contact (731) to move under the reset action.

6. The fiber optic switching protection system for fiber optic switching protection equipment according to claim 5, characterized in that, The triggering structure (302) includes a movable plate (3021), a hook (3022), and a spring (3023), wherein, The movable plate (3021) is movably disposed outside the first auxiliary output connector (320) via a guide rod; The center of the second photosensitive film (602) is connected to the movable plate (3021); The hook (3022) is rotatably mounted on the movable plate (3021) and is pressed by the spring piece (3023) to abut against the end of the second lever (720).

7. The fiber optic switching protection system for fiber optic switching protection equipment according to claim 5, characterized in that, A torsion spring (713) for driving reset is sleeved on the rotation shaft of the first lever (710).

8. The fiber optic switching protection system for fiber optic switching protection equipment according to claim 6, characterized in that, One end of the first lever (710) is provided with a fork head (712), and the sliding contact (731) is embedded in the fork head (712); The other end of the first lever (710) is provided with a first hook (711), which is hooked to a second hook (722) on the second lever (720).

9. The fiber optic switching protection system for fiber optic switching protection equipment according to claim 8, characterized in that, The second lever (720) is provided with a third hook (723) at the end away from the second hook (722). When the second photosensitive film (602) deforms outward, the hook (3022) abuts against the third hook (723).

Images