Passive optical switch

Abstract

The utility model relates to a passive optical switch, which comprises a shell and a permanent magnet, a light path assembly for reflecting light signals emitted by an external optical time domain reflectometer is arranged in the shell, and the light path assembly is fixed on a doorway of an object to be detected; a light path blocking mechanism capable of blocking the light path assembly from reflecting light signals out is also arranged in the shell; the permanent magnet is fixed on a door body for opening or closing the doorway, is attached to one side of the shell when the doorway is closed by the door body, and drives the light path blocking mechanism to act through magnetic force to block the light path assembly from reflecting light signals out when the doorway is closed by the door body. The beneficial effects of the utility model are that monitoring can be realized without a power supply, and the device can be normally used even in a scene where normal power supply is not convenient.

Description

Technical Field

[0001] The utility model relates to the field of optical communication, in particular to a passive optical switch. Background Art

[0002] The commonly used optical switches on the market are mechanical optical switches and electromagnetic optical switches. Both require corresponding power supply to be used normally, and are large in size. They cannot be used in special scenarios where the environment is harsh, old, and the space is narrow, or it is inconvenient to supply power normally but real-time monitoring is required, such as smart manhole covers, cabinet doors, etc., and cannot monitor in real time whether the manhole covers or cabinet doors are opened. Utility Model Content

[0003] In summary, in order to overcome the deficiencies of the prior art, the technical problem to be solved by the present invention is to provide a passive optical switch.

[0004] The utility model solves the above-mentioned technical problems with the following technical solutions: a passive optical switch, comprising a shell and a permanent magnet; an optical path component for reflecting an optical signal emitted by an external optical time domain reflectometer is provided in the shell, and the optical path component is fixed on the doorway of an object to be detected; an optical path blocking mechanism for blocking the optical path component from reflecting the optical signal is also provided in the shell; the permanent magnet is fixed on a door body that opens or closes the doorway, and is attached to one side of the shell when the door body closes the doorway, and the permanent magnet drives the optical path blocking mechanism to operate through magnetic force when the door body closes the doorway to block the optical path component from reflecting the optical signal.

[0005] The beneficial effect of the utility model is that monitoring can be achieved without power supply, and it can be used normally even in a scene where normal power supply is inconvenient.

[0006] On the basis of the above technical solution, the present invention can also be improved as follows.

[0007] Furthermore, the optical path component includes an optical fiber collimator, a reflector and a pigtail; an outer steel tube is provided in the shell; the front part of the optical fiber collimator is located inside the outer steel tube, and the rear end thereof is connected to the pigtail, and the pigtail is connected to an external optical time domain reflectometer through an optical fiber; the reflector is fixed in the outer steel tube and at a position corresponding to the front of the optical fiber collimator, and the reflector is coaxially arranged with the optical fiber collimator; the optical path blocking mechanism is installed in the shell at a position corresponding to between the optical fiber collimator and the reflector, and slides toward the outer steel tube under the action of the magnetic force of the permanent magnet to block the reflection of the optical signal.

[0008] The beneficial effects of adopting the above further technical solution are: achieving the transmission of optical signals, and switching states by blocking the optical signals to achieve monitoring.

[0009] Furthermore, it also includes a fiber sleeve, which is wrapped around the outside of the pigtail.

[0010] The beneficial effect of adopting the above further technical solution is: protecting the pigtail.

[0011] Furthermore, the optical path blocking mechanism includes a slide and two springs; the slide is located in the shell and corresponds to the position on the rear side of the outer steel tube, the two springs are respectively located on the left and right sides of the outer steel tube, and one end of the two springs respectively abuts against the two sides of the slide, and the other ends of the two springs respectively abut against the corresponding positions of the cover plate of the shell; a stopper is provided on the slide at a position corresponding to the position between the optical fiber collimator and the reflector, the stopper freely passes through the side wall of the outer steel tube and reaches between the optical fiber collimator and the reflector, and under the action of the magnetic force of the permanent magnet, the slide compresses the spring to drive the stopper to slide to block the reflection of the optical signal.

[0012] The beneficial effect of adopting the above further technical solution is: monitoring whether the door is opened or closed by switching the state of the optical signal emitted and monitored by an external optical time domain reflectometer.

[0013] Furthermore, a conical opening groove corresponding to the outer steel tube is provided on one side of the slide seat close to the outer steel tube, and the opening groove is larger at one end close to the outer steel tube.

[0014] The beneficial effect of adopting the above further solution is: ensuring that the stopper slides without deflection.

[0015] Furthermore, a lug is provided on the outer side of the shell, and a screw hole is provided on the lug for fixing the lug to the door through a screw.

[0016] The beneficial effect of adopting the above further solution is that the housing can be fixed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the utility model installed on the object to be detected (cabinet);

[0018] Figure 2 for Figure 1 A magnified view of;

[0019] Figure 3 for Figure 1 B enlarged view;

[0020] Figure 4 It is a schematic diagram of the structure of the utility model after the permanent magnet is removed;

[0021] Figure 5 for Figure 4 A cross-sectional view of

[0022] Figure 6 for Figure 4 A schematic diagram of the structure after the cover is removed;

[0023] Figure 7 for Figure 4 Schematic diagram of the structure after removing the shell;

[0024] Figure 8 for Figure 7 A schematic diagram of the structure after the cover is removed;

[0025] Fig. 9 It is a schematic diagram of the structure after the slide seat and the stopper are connected;

[0026] Fig.10 It is a schematic diagram of the structure of the outer steel pipe;

[0027] Fig.11 A schematic diagram of a block blocking a light signal from being reflected;

[0028] Fig.12 for Fig.11 Side view of

[0029] Fig.13 It is a schematic diagram of the block not blocking the light signal from being reflected;

[0030] Fig.14 for Fig.13 Side view of.

[0031] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0032] 1. Cover plate, 2. Shell, 3. Fiber sleeve, 4. Pressure spring, 5. Outer steel tube of fiber collimator, 6. Fiber collimator, 7. Reflector, 8. Stopper, 9. Object to be tested (example: telecommunication cabinet), 10. Permanent magnet, 11. Pigtail, 12. Slide, 13. Lug, 14. Screw hole. DETAILED DESCRIPTION

[0033] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0034] like Figure 1-3As shown, a passive optical switch includes a shell 2 and a permanent magnet 10. An optical path component for reflecting the optical signal emitted by an external optical time domain reflectometer is provided in the shell 2, and the optical path component is fixed on the doorway of the object to be detected 9. An optical path blocking mechanism that can block the optical path component from reflecting the optical signal is also provided in the shell 2. The permanent magnet 10 is fixed on the door body that opens or closes the doorway, and is attached to one side of the shell 2 when the door body closes the doorway. When the door body closes the doorway, the permanent magnet 10 drives the optical path blocking mechanism to operate through magnetic force to block the optical path component from reflecting the optical signal. A lug 13 is provided on the outside of the shell 2, and a screw hole 14 is provided on the lug 13 to fix it to the doorway through a screw.

[0035] like Figure 4 and 5 As shown, the optical path component includes a fiber collimator 6, a reflector 7 and a pigtail 11. An outer steel tube 5 is provided in the housing 2. The front portion of the fiber collimator 6 is located inside the outer steel tube, and the rear end thereof is connected to the pigtail 11, and the pigtail 11 is connected to an external optical time domain reflectometer through an optical fiber. The reflector 7 is fixed in the outer steel tube 5 and corresponds to a position in front of the fiber collimator 6, and the reflector 7 is coaxially arranged with the fiber collimator 6. The optical path blocking mechanism is installed in the housing 2 at a position corresponding to between the fiber collimator 6 and the reflector 7, and slides toward the outer steel tube 5 under the action of the magnetic force of the permanent magnet 10 to block the reflection of the optical signal. The switch also includes a fiber sleeve 3, which is wrapped around the outside of the pigtail 11.

[0036] like Figure 6-10 As shown, the optical path blocking mechanism includes a slide 12 and two springs 4. The slide 12 is located in the housing 2 and corresponds to the rear side of the outer steel tube 5. The two springs 4 are located on the left and right sides of the outer steel tube 5, and one end of the two springs 4 respectively abuts against the two sides of the slide 12, and the other ends of the two springs 4 respectively abut against the corresponding positions of the cover plate 1 of the housing 2. A stopper 8 is provided on the slide 12 at a position corresponding to the position between the optical fiber collimator 6 and the reflector 7. The stopper 8 freely passes through the side wall of the outer steel tube 5 and reaches between the optical fiber collimator 6 and the reflector 7. Under the action of the magnetic force of the permanent magnet 10, the slide 12 compresses the spring 4 to drive the stopper 8 to slide to block the reflection of the optical signal. A conical opening groove corresponding to the outer steel tube 5 is provided on the side of the slide 12 close to the outer steel tube 5, and the end of the opening groove close to the outer steel tube 5 is larger.

[0037] like Fig.11 and 12As shown, when the door is closed, the permanent magnet 10 attracts the block 8 and the slide 12 through magnetic force, the slide 12 compresses the two springs 4, and the block 8 moves toward the center line of the fiber collimator 6 and the reflector 7 and covers the center line of both (the initial state of the block 8 is between the fiber collimator 6 and the reflector 7, but does not cover the center line of both). The optical signal emitted by the external optical time domain reflectometer can no longer be reflected back by the transmitting mirror 7 through the fiber collimator 6, and the optical time domain reflectometer determines that no abnormal signal is generated, that is, it determines that the door is in a closed state at this time. Fig.12 and 13 As shown, when the door is opened, the permanent magnet 10 is separated from the shell 2, and its magnetic force cannot attract the block 8. Under the action of the two springs 4, the block 8 returns to the initial position and resets without covering the center line of the fiber collimator 6 and the reflector 7. The optical signal emitted by the external optical time domain reflectometer is reflected back through the fiber collimator 6 and the transmitting mirror 7. The optical time domain reflectometer determines that an abnormal signal is generated, that is, it determines that the door is open at this time. The state of the optical signal emitted and monitored by the external optical time domain reflectometer is switched by the movement of the optical path blocking mechanism, and then the manhole cover or cabinet door is monitored in real time to see whether it is opened. Monitoring can be achieved without power supply, and it can be used normally even in scenes where normal power supply is inconvenient.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A passive optical switch, characterized in that: The invention comprises a shell (2) and a permanent magnet (10); the shell (2) is provided with an optical path component for reflecting the optical signal emitted by an external optical time domain reflectometer, and the optical path component is fixed on the doorway of the object to be detected (9); the shell (2) is also provided with an optical path blocking mechanism capable of blocking the optical path component from reflecting the optical signal; the permanent magnet (10) is fixed on a door body that opens or closes the doorway, and is attached to one side of the shell (2) when the door body closes the doorway, and the permanent magnet (10) drives the optical path blocking mechanism to operate through magnetic force when the door body closes the doorway, thereby blocking the optical path component from reflecting the optical signal.

2. The passive optical switch according to claim 1, characterized in that: The optical path component comprises an optical fiber collimator (6), a reflector (7) and a pigtail (11); an outer steel tube (5) is arranged inside the housing (2); the front part of the optical fiber collimator (6) is located inside the outer steel tube (5), and the rear end thereof is connected to the pigtail (11), and the pigtail (11) is connected to an external optical time domain reflectometer through an optical fiber; the reflector (7) is fixed inside the outer steel tube (5) and at a position corresponding to the front of the optical fiber collimator (6), and the reflector (7) and the optical fiber collimator (6) are coaxially arranged; the optical path blocking mechanism is installed in the housing (2) at a position corresponding to between the optical fiber collimator (6) and the reflector (7), and slides toward the outer steel tube (5) under the action of the magnetic force of the permanent magnet (10) to block the reflection of the optical signal.

3. The passive optical switch according to claim 2, characterized in that: It also comprises a fiber sleeve (3), wherein the fiber sleeve (3) is wrapped around the outside of the pigtail (11).

4. The passive optical switch according to claim 2, characterized in that: The optical path blocking mechanism comprises a slide seat (12) and two springs (4); the slide seat (12) is located in the housing (2) and at a position corresponding to the rear side of the outer steel tube (5); the two springs (4) are respectively located on the left and right sides of the outer steel tube (5); one end of the two springs (4) respectively abuts against the two sides of the slide seat (12); the other ends of the two springs (4) respectively abut against corresponding positions of the cover plate (1) of the housing (2); a stopper (8) is provided on the slide seat (12) at a position corresponding to between the optical fiber collimator (6) and the reflector (7); the stopper (8) freely passes through the side wall of the outer steel tube (5) and reaches between the optical fiber collimator (6) and the reflector (7); and under the action of the magnetic force of the permanent magnet (10), the slide seat (12) compresses the spring (4) to drive the stopper (8) to slide to block the reflection of the optical signal.

5. The passive optical switch according to claim 4, characterized in that: A conical opening groove corresponding to the outer steel tube (5) is provided on one side of the slide seat (12) close to the outer steel tube (5), and the end of the opening groove close to the outer steel tube (5) is larger.

6. The passive optical switch according to any one of claims 1 to 5, characterized in that: The outer side of the shell (2) is provided with a lug (13), and the lug (13) is provided with a screw hole (14) for fixing the lug to the door through screws.

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