An optical watertight travel switch

Abstract

The present invention provides an optical watertight travel switch, comprising: a housing, an optical generating component, an optical receiving component, a sealing mechanism, a driving mechanism, an optical generating component mounting cavity and an optical receiving component mounting cavity. The present invention is different from a common travel switch device. The gap between the movable component and the housing of the present invention does not need to be sealed. Even if water penetrates into the gap of the driving mechanism, the water will be blocked by the flexible sleeve, and the sealed window glass will provide secondary protection for the electrical part to ensure that the electrical components will not be damaged by water immersion. When an external travel or action signal arrives, the movable component will radially squeeze the flexible sleeve, thereby interrupting the optical signal path. The optical receiving component can determine whether the external travel or action is in place by flipping the signal based on whether the optical signal is in place, thereby achieving a switch control effect.

Description

Technical Field

[0001] The invention relates to the field of optical technology, in particular to an optical watertight travel switch. Background Art

[0002] The working principle of the travel switch device is to switch and determine the circuit working state through the moving position of the moving parts. If used in an underwater environment, the dynamic watertight performance between the moving parts and the electrical parts becomes an important indicator of the watertight travel switch. However, when the moving parts move, there is a risk of water leakage even with waterproof measures such as sealing rings, which can cause the electrical parts to short-circuit and fail.

[0003] The gap space required for the movement of the moving parts in common travel switches and the watertight protection of the electrical components connected to the gap space are a major limiting factor in the underwater application of travel switches. Summary of the invention

[0004] The present invention is to solve the problem of dynamic watertight protection of the switch, and proposes an optical watertight travel switch, which adopts the characteristic that optical signals can be transmitted non-contact, the electrical components are fully sealed, and the installation positions of the optical generating component and the optical receiving component adopt multiple watertight protection measures; the electrical components and the movable components are fully isolated, and there is no direct physical contact between the electrical components and the movable components, and the movable components only rely on the deformation of the flexible sleeve to control the on and off of the optical path; the whole machine has high reliability, avoiding the dynamic watertight problem caused by the movable components, and the water leakage caused by the movement of the movable components will not damage the operation of the whole machine.

[0005] The present invention provides an optical watertight travel switch, comprising a housing, an optical generating assembly fixed inside the housing, an optical receiving assembly fixed inside the housing and arranged on an output optical path of the optical generating assembly, a sealing mechanism connected to both the output end of the optical generating assembly and the receiving end of the optical receiving assembly, and a driving mechanism arranged at the upper end and both sides of the sealing mechanism, wherein the optical receiving assembly is used to receive a light signal emitted by the optical generating assembly and convert it into an electrical signal for output;

[0006] The optical generating component, the optical receiving component and the sealing mechanism form a sealing body, and the driving mechanism is located outside the sealing body;

[0007] The method of using the optical watertight limit switch is as follows: under the action of external force, the driving mechanism compresses the sealing mechanism to deform and blocks the receiving light path of the optical receiving component, so that the optical receiving component outputs a low-level signal. After the external force disappears, the driving mechanism resets, the optical receiving component receives the light signal emitted by the optical generating component and converts it into an electrical signal output, and the electrical signal is a high-level signal.

[0008] The optical watertight travel switch described in the present invention is preferably configured such that the driving mechanism includes a movable component passing through the housing and arranged at the upper end of the sealing mechanism and an elastic body fixed at the bottom of the movable component and located at both sides of the sealing mechanism.

[0009] In the optical watertight travel switch described in the present invention, as a preferred embodiment, the elastic body is a spring or a spring sheet.

[0010] The optical watertight travel switch of the present invention, as a preferred embodiment, further comprises an optical generating component installation cavity fixed to the outside of the optical generating component and an optical receiving component installation cavity fixed to the outside of the optical receiving component;

[0011] The optical generating component installation cavity comprises an optical generating component installation cavity body fixed to the outside of the optical generating component and sealed, a first installation arm arranged outside the optical generating component installation cavity body and located on the output light path of the optical generating component, and a first light path transmission hole arranged on the central axis of the first installation arm, wherein the first light path transmission hole is a through hole;

[0012] The optical receiving component installation cavity includes an optical receiving component installation cavity body that fixes the external seal of the optical receiving component, a second installation arm that is arranged outside the optical receiving component installation cavity body and located on the output light path of the optical receiving component, and a second light path transmission hole that is arranged on the central axis of the second installation arm, and the second light path transmission hole is a through hole.

[0013] An optical watertight travel switch described in the present invention, as a preferred embodiment, the sealing mechanism includes a flexible sleeve connected to the outside of the first mounting arm and the second mounting arm, a first window glass arranged inside the first optical path transmission hole, a first fastening ring arranged outside the first mounting arm and the flexible sleeve, a second window glass arranged inside the second optical path transmission hole and a second fastening ring arranged outside the second mounting arm and the flexible sleeve.

[0014] The optical watertight travel switch described in the present invention is preferably sealed between the first mounting arm and the flexible sleeve with watertight glue, between the first optical path transmission hole and the first window glass with watertight glue, and the inside of the optical generating component mounting cavity body is filled with waterproof glue;

[0015] The second mounting arm and the flexible sleeve are sealed with watertight glue, the second optical path transmission hole and the second window glass are sealed with watertight glue, and the inside of the optical receiving component mounting cavity body is filled with waterproof glue;

[0016] The optical generating component mounting cavity body and the first mounting arm are an integrated structure; the optical receiving component mounting cavity body and the second mounting arm are an integrated structure.

[0017] The optical watertight travel switch described in the present invention is preferably provided with a first sealing cover plate on a side of the optical generating component mounting cavity body opposite to the first mounting arm, and a second sealing cover plate on a side of the optical receiving component mounting cavity body opposite to the second mounting arm;

[0018] The optical generating component installation cavity body and the first sealing cover plate are sealed with watertight glue, and the optical receiving component installation cavity body and the second sealing cover plate are sealed with watertight glue.

[0019] The optical watertight travel switch described in the present invention, as a preferred embodiment, the optical generating assembly includes a light source driving printed circuit board fixed inside the optical generating assembly mounting cavity body and a light source connected to the light source driving printed circuit board;

[0020] The optical receiving assembly includes a photoelectric conversion device driving printed board fixed inside the optical receiving assembly mounting cavity body and a photoelectric conversion device connected to the photoelectric conversion device driving printed board;

[0021] The light source is a collimated light device or a divergent light device, and the photoelectric conversion device is an electric vacuum device or a photoelectric device.

[0022] In the optical watertight travel switch described in the present invention, as a preferred embodiment, the light source is a semiconductor laser or a diode;

[0023] The photoelectric conversion device is any one of the following: a phototube, a photomultiplier tube, a photoresistor, a phototransistor and a CCD.

[0024] The optical watertight travel switch described in the present invention, as a preferred embodiment, also includes a cable connected to both the optical generating component and the optical receiving component, a power module and a signal processing module.

[0025] An optical watertight travel switch comprises a housing assembly, an optical generating assembly, an optical receiving assembly, a cable assembly, a driving mechanism, and a sealing mechanism;

[0026] The shell component is processed with an optical generating component installation cavity and an optical receiving component installation cavity, as well as cable routing holes facing the two installation cavities; the shell component is respectively provided with sealing cover plates for the optical generating component installation cavity and the optical receiving component installation cavity; the shell component is processed with a flexible sleeve installation arm, and an optical path transmission hole is opened on the central axis of each installation arm; the component is processed with a driving mechanism activity hole;

[0027] Point-to-point optical signal transmission is achieved between the optical generating component and the optical receiving component through the first optical path transmission hole, the first window glass, the flexible sleeve, the second window glass, and the second optical path transmission hole;

[0028] The cable assembly realizes external electrical communication between the optical generating assembly and the optical receiving assembly through the cable routing hole;

[0029] In the driving mechanism, the movable part passes through the movable hole to squeeze the flexible sleeve, and the elastic object realizes the reset of the movable part after the external force is unloaded;

[0030] In the sealing mechanism, the first window glass and the second window glass are respectively placed in the light path transmission hole and waterproofly sealed with watertight glue; the flexible sleeve is installed on the mounting arms on both sides, bonded with watertight glue, and fixed with fastening rings, respectively;

[0031] The electrical components and active components are completely isolated, and the dynamic watertightness problem caused by the active components will not affect the electrical components;

[0032] The action mode of the active parts of the driving mechanism is not limited to the slideway extrusion mode, but is also applicable to the action modes such as rocker, twisting, two-way push and pull that can compress the deformation of the flexible sleeve;

[0033] The resetting elastic object of the driving mechanism is adjusted according to the action mode of the movable part described in the claim, and the elastic object can be a spring, a spring sheet, etc.;

[0034] The optical transmission hole is separated by corrosion-resistant glass windows and sealed with transparent waterproof glue to provide watertight protection for electrical components.

[0035] The flexible casing is made of corrosion-resistant, ductile, wear-resistant and watertight materials;

[0036] The physical connection between the flexible sleeve and the mounting arm is bonded with sealant and fixed again with a fastening ring to achieve double sealing protection;

[0037] The installation cavity of the optical generating component and the optical receiving component can be filled with insulating waterproof glue to provide further watertight protection for the circuit;

[0038] The light source of the optical generating component may be a collimated optical device such as a semiconductor laser;

[0039] The light source of the optical generating component may be a light emitting diode or other divergent light device;

[0040] The photoelectric conversion device of the optical receiving assembly may be an electric vacuum device such as a photoelectric tube, a photomultiplier tube, etc.;

[0041] The photoelectric conversion device of the optical receiving component can adopt photoelectric devices such as photoresistors, phototransistors, CCD and other semiconductor devices;

[0042] A power module provides driving power for the optical generating component and the optical receiving component;

[0043] The signal processing module processes the output signal of the optical watertight travel switch, outputs the in-place information, and provides the switch control quantity.

[0044] The present invention proposes an optical watertight travel switch, which is composed of a housing component, an optical generating component, an optical receiving component, a cable component, a driving mechanism and a sealing mechanism. The housing component includes a watertight cable routing hole, an optical generating component installation cavity, an optical receiving component installation cavity, a driving mechanism movable hole, an optical path transmission hole and a flexible sleeve installation arm; the optical generating component includes a light source and a light source driving printed circuit board; the optical receiving component includes a photoelectric conversion device and a driving printed circuit board; the cable component includes power supply and signal transmission cables of the optical generating component and the optical receiving component and watertight glue; the driving mechanism includes a movable part and a resetting elastic object; the sealing mechanism includes a corrosion-resistant flexible sleeve, a corrosion-resistant window glass, a waterproof sealant and a fastening ring.

[0045] The shell assembly cooperates with the cable assembly, optical generating assembly, optical receiving assembly, driving mechanism, and sealing assembly to process the corresponding watertight cable routing holes, optical generating assembly installation cavity, optical receiving assembly installation cavity, driving mechanism movable hole, optical path transmission hole, and flexible sleeve installation arm. Sealant should be poured between the watertight cables and the shell at both ends of the watertight cable routing holes; after the optical generating assembly and the optical receiving assembly are installed in their respective installation cavities, they are connected to the watertight cables to achieve external electrical connection and signal transmission; corrosion-resistant window glass is installed in the optical path transmission holes on both sides of the optical generating assembly and the optical receiving assembly, and transparent waterproof sealant is added to fix them; the corrosion-resistant flexible sleeve is installed on the installation arms on both sides of the shell, and fixed with a fastening ring and waterproof sealant.

[0046] The driving mechanism passes through the corresponding movable hole of the shell structure, and an elastic object is placed in the free movable direction thereof for the reset movement of the movable part.

[0047] The present invention has the following advantages:

[0048] (1) Different from common travel switch devices, the gap between the movable part and the housing of the present invention does not need to be sealed. Even if water penetrates into the gap of the driving mechanism, the water will be blocked by the flexible sleeve, and the sealed window glass will provide secondary protection for the electrical part to ensure that the electrical parts will not be damaged by water immersion. When the external travel or action signal arrives, the movable part will radially squeeze the flexible sleeve, thereby interrupting the optical signal path. The optical receiving component can judge whether the external travel or action is in place by flipping the signal based on whether the optical signal is in place, thereby achieving the switch control effect.

[0049] (2) The present invention adopts a miniaturized, semi-sealed design. The optical watertight travel switch signal-related devices are light sources and photoelectric conversion devices, both of which are miniaturized devices, which can realize the miniaturization of the travel switch. The light source 22 can use divergent light or collimated light, and can be any light-emitting diode, semiconductor laser, etc.; the photoelectric conversion device 32 can use electric vacuum devices such as phototubes and photomultiplier tubes, or semiconductor devices such as photoresistors, phototransistors, and CCDs. Combined with the characteristics, the present invention realizes full sealing of electrical components and full isolation of electrical components and moving parts, which is more suitable for underwater environment applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 This is a schematic diagram of the structure of an optical watertight travel switch;

[0051] Figure 2 It is a side view of an optical watertight travel switch;

[0052] Figure 3 The present invention is a state diagram of an optical watertight travel switch when a travel signal of the optical watertight travel switch arrives.

[0053] Reference numerals:

[0054] 1. Housing; 2. Optical generating component; 21. Light source driving printed circuit board; 22. Light emitting source; 3. Optical receiving component; 31. Photoelectric conversion device driving printed circuit board; 32. Photoelectric conversion device; 4. Sealing mechanism; 41. Flexible sleeve; 42. First window glass; 43. First fastening ring; 44. Second window glass; 45. Second fastening ring; 5. Driving mechanism; 51. Moving parts; 52. Elastomer; 6. Optical generating component mounting cavity; 61. Optical generating component mounting cavity body; 62. First mounting arm; 63. First light path transmission hole; 7. Optical receiving component mounting cavity; 71. Optical receiving component mounting cavity body; 72. Second mounting arm; 73. Second light path transmission hole; 8. Electric cable. DETAILED DESCRIPTION

[0055] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0056] Example 1

[0057] like Figure 1-2As shown, an optical watertight travel switch comprises a housing 1, an optical generating component 2 fixed inside the housing 1, an optical receiving component 3 fixed inside the housing 1 and arranged on the output optical path of the optical generating component 2, a sealing mechanism 4 connected to both the output end of the optical generating component 2 and the receiving end of the optical receiving component 3, a driving mechanism 5 arranged at the upper end and both sides of the sealing mechanism 4, an optical generating component installation cavity 6 fixed to the outside of the optical generating component 2 and sealed, an optical receiving component installation cavity 7 fixed to the outside of the optical receiving component 3 and sealed, and a cable 8 connected to both the optical generating component 2 and the optical receiving component 3, a power module, and a signal processing module;

[0058] The optical receiving component 3 is used to receive the optical signal emitted by the optical generating component 2 and convert it into an electrical signal for output;

[0059] The optical generating assembly 2, the optical receiving assembly 3 and the sealing mechanism 4 form a sealing body, and the driving mechanism 5 is located outside the sealing body;

[0060] Under the action of external force, the driving mechanism 5 compresses the sealing mechanism 4 to deform and blocks the receiving light path of the optical receiving component 3, so that the optical receiving component 3 outputs a low-level signal. After the external force disappears, the driving mechanism 5 is reset, and the optical receiving component 3 receives the light signal emitted by the optical generating component 2 and converts it into an electrical signal for output, and the electrical signal is a high-level signal.

[0061] The driving mechanism 5 includes a movable part 51 passing through the housing 1 and arranged at the upper end of the sealing mechanism 4, and an elastic body 52 fixed at the bottom of the movable part 51 and located at both sides of the sealing mechanism 4;

[0062] The elastic body 52 is a spring or a spring sheet;

[0063] The optical generating component installation cavity 6 comprises an optical generating component installation cavity body 61 fixed and sealed outside the optical generating component 2, a first installation arm 62 arranged outside the optical generating component installation cavity body 61 and located on the output light path of the optical generating component 2, and a first light path transmission hole 63 arranged on the central axis of the first installation arm 62, and the first light path transmission hole 63 is a through hole;

[0064] The optical receiving component installation cavity 7 includes an optical receiving component installation cavity body 71 for fixing the external seal of the optical receiving component 3, a second installation arm 72 arranged outside the optical receiving component installation cavity body 71 and located on the output optical path of the optical receiving component 3, and a second optical path transmission hole 73 arranged on the central axis of the second installation arm 72, and the second optical path transmission hole 73 is a through hole;

[0065] The sealing mechanism 4 includes a flexible sleeve 41 connected to the outside of the first mounting arm 62 and the second mounting arm 72, a first window glass 42 arranged inside the first light path transmission hole 63, a first fastening ring 43 arranged outside the first mounting arm 62 and the flexible sleeve 41, a second window glass 44 arranged inside the second light path transmission hole 73, and a second fastening ring 45 arranged outside the second mounting arm 72 and the flexible sleeve 41;

[0066] The first mounting arm 62 and the flexible sleeve 41 are sealed with watertight glue, the first optical path transmission hole 63 and the first window glass 42 are sealed with watertight glue, and the inside of the optical generating component mounting cavity body 61 is filled with waterproof glue;

[0067] The second mounting arm 72 and the flexible sleeve 41 are sealed with watertight glue, the second optical path transmission hole 73 and the second window glass 44 are sealed with watertight glue, and the inside of the optical receiving component mounting cavity body 71 is filled with waterproof glue;

[0068] The optical generating component mounting cavity body 61 and the first mounting arm 62 are an integrated structure; the optical receiving component mounting cavity body 71 and the second mounting arm 72 are an integrated structure;

[0069] A first sealing cover plate is provided on a side of the optical generating component installation cavity body 61 opposite to the first installation arm 62, and a second sealing cover plate is provided on a side of the optical receiving component installation cavity body 71 opposite to the second installation arm 72;

[0070] The optical generating component installation cavity body 61 and the first sealing cover plate are sealed with watertight glue, and the optical receiving component installation cavity body 71 and the second sealing cover plate are sealed with watertight glue;

[0071] The optical generating assembly 2 includes a light source driving printed circuit board 21 fixed inside the optical generating assembly mounting cavity body 61 and a light source 22 connected to the light source driving printed circuit board 21;

[0072] The optical receiving assembly 3 includes a photoelectric conversion device driving printed circuit board 31 fixed inside the optical receiving assembly mounting cavity body 71 and a photoelectric conversion device 32 connected to the photoelectric conversion device driving printed circuit board 31;

[0073] The light source 22 is a collimated light device or a divergent light device, and the photoelectric conversion device 32 is an electric vacuum device or a photoelectric device;

[0074] The light source 22 is a semiconductor laser or a diode;

[0075] The photoelectric conversion device 32 is any one of the following: a phototube, a photomultiplier tube, a photoresistor, a phototransistor and a CCD.

[0076] Example 2

[0077] like Figure 1-2 As shown, an optical watertight travel switch comprises:

[0078] The housing 1 comprises: a watertight cable routing hole; an optical generating component installation cavity 6, which comprises an optical generating component installation cavity body 61, a first installation arm 62, a first optical path transmission hole 63, and a first sealing cover plate; an optical receiving component installation cavity 7, which comprises an optical receiving component installation cavity body 71, a second installation arm 72, a second optical path transmission hole 73, a second sealing cover plate, and a driving mechanism movable hole;

[0079] The optical generating component 2 comprises: a light source driving printed circuit board 21 and a light source 22;

[0080] The optical receiving component 3 includes: a photoelectric conversion device driving printed circuit board 31 and a photoelectric conversion device 32;

[0081] The cable assembly includes: a watertight cable 8, a watertight glue;

[0082] The driving mechanism 5 comprises: a movable component 51 and a resetting elastic object 52;

[0083] The sealing mechanism 4 comprises: a corrosion-resistant flexible sleeve 41 ; a corrosion-resistant first window glass 42 ; a first fastening ring 43 ; a corrosion-resistant second window glass 44 ; and a second fastening ring 45 .

[0084] All ports of the watertight cable routing hole are filled with watertight glue; the contact parts between the sealing cover plate and the optical generating component installation cavity body 61 and the optical receiving component installation cavity body 71 are filled with sealant and fixed by crimping; the optical generating component installation cavity body 61 and the optical receiving component installation cavity body 71 can be injected with waterproof glue after the optical generating component 2 and the optical receiving component 3 are installed; the first optical path transmission hole 63, the second optical path transmission hole 73 and the first window glass 42 and the second window glass 44 are injected and fixed with transparent waterproof sealant; the flexible sleeve 6 and the first mounting arm 62 and the second mounting arm 72 are connected with sealant, and are further sealed and fixed with the first fastening ring 43 and the second fastening ring 45;

[0085] The method of use of Example 1-2 is:

[0086] The advantageous design of the present invention is that the gap between the movable component 5 of the driving mechanism and the housing 1 does not need to consider the watertightness, while the difficulty of dynamic waterproof sealing is the main limiting factor for the underwater application of common photoelectric travel switches.

[0087] The working principle of the present invention is as follows: before the external force comes, the light source 22 generates a light path along the collimated flexible sleeve 41 to reach the photoelectric conversion device 32, and the driving circuit transmits a high-level signal; Figure 3As shown, when external force comes, the movable component 5 will radially squeeze the flexible sleeve 41, causing the optical path to be interrupted, the elastic body 52 is compressed, and the photoelectric conversion device 32 has a signal flip due to the lack of optical signal input, and the drive circuit transmits a low-level signal; when the external force disappears, the elastic body 52 releases the pressure to push the movable component 51 to reset, and the optical path is reconnected, then the photoelectric conversion device 32 has a signal flip again, and the drive circuit transmits a high-level signal, thereby achieving a switch control effect.

[0088] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An optical watertight travel switch, characterized in that: It comprises a housing (1), an optical generating component (2) fixed inside the housing (1), an optical receiving component (3) fixed inside the housing (1) and arranged on the output light path of the optical generating component (2), a sealing mechanism (4) connected to the output end of the optical generating component (2) and the receiving end of the optical receiving component (3), and a driving mechanism (5) arranged on the upper end and both sides of the sealing mechanism (4), wherein the optical receiving component (3) is used to receive the optical signal emitted by the optical generating component (2) and convert it into an electrical signal for output; The optical generating component (2), the optical receiving component (3) and the sealing mechanism (4) form a sealing body, and the driving mechanism (5) is located outside the sealing body; The method for using the optical watertight travel switch is as follows: the driving mechanism (5) compresses the sealing mechanism (4) to deform and block the receiving light path of the optical receiving component (3) under the action of an external force, so that the optical receiving component (3) outputs a low-level signal; after the external force disappears, the driving mechanism (5) is reset, the optical receiving component (3) receives the light signal emitted by the optical generating component (2) and converts it into an electrical signal for output, and the electrical signal is a high-level signal.

2. An optical watertight travel switch according to claim 1, characterized in that: The driving mechanism (5) comprises a movable component (51) passing through the housing (1) and arranged at the upper end of the sealing mechanism (4), and an elastic body (52) fixed to the bottom of the movable component (51) and located on both sides of the sealing mechanism (4).

3. An optical watertight travel switch according to claim 2, characterized in that: The elastic body (52) is a spring or a spring sheet.

4. The optical watertight travel switch according to claim 1, characterized in that: It also includes an optical generating component installation cavity (6) fixed to the outside of the optical generating component (2) and sealed, and an optical receiving component installation cavity (7) fixed to the outside of the optical receiving component (3) and sealed; The optical generating component installation cavity (6) comprises an optical generating component installation cavity body (61) fixed and sealed on the outside of the optical generating component (2), a first installation arm (62) arranged outside the optical generating component installation cavity body (61) and located on the output light path of the optical generating component (2), and a first light path transmission hole (63) arranged on the central axis of the first installation arm (62), wherein the first light path transmission hole (63) is a through hole; The optical receiving component installation cavity (7) comprises an optical receiving component installation cavity body (71) for fixing the external seal of the optical receiving component (3), a second installation arm (72) arranged outside the optical receiving component installation cavity body (71) and located on the output light path of the optical receiving component (3), and a second light path transmission hole (73) arranged on the central axis of the second installation arm (72), wherein the second light path transmission hole (73) is a through hole.

5. The optical watertight travel switch according to claim 4, characterized in that: The sealing mechanism (4) comprises a flexible sleeve (41) connected to the outside of the first mounting arm (62) and the second mounting arm (72), a first window glass (42) arranged inside the first light path transmission hole (63), a first fastening ring (43) arranged outside the first mounting arm (62) and the flexible sleeve (41), a second window glass (44) arranged inside the second light path transmission hole (73), and a second fastening ring (45) arranged outside the second mounting arm (72) and the flexible sleeve (41).

6. The optical watertight travel switch according to claim 5, characterized in that: The first mounting arm (62) and the flexible sleeve (41) are sealed with watertight glue, the first optical path transmission hole (63) and the first window glass (42) are sealed with watertight glue, and the interior of the optical generating component mounting cavity body (61) is filled with waterproof glue; The second mounting arm (72) and the flexible sleeve (41) are sealed with watertight glue, the second optical path transmission hole (73) and the second window glass (44) are sealed with watertight glue, and the interior of the optical receiving component mounting cavity body (71) is filled with waterproof glue; The optical generating component mounting cavity body (61) and the first mounting arm (62) are an integrated structure; the optical receiving component mounting cavity body (71) and the second mounting arm (72) are an integrated structure.

7. The optical watertight travel switch according to claim 4, characterized in that: A first sealing cover plate is provided on the side of the optical generating component installation cavity body (61) opposite to the first installation arm (62), and a second sealing cover plate is provided on the side of the optical receiving component installation cavity body (71) opposite to the second installation arm (72); The optical generating component installation cavity body (61) and the first sealing cover plate are sealed using watertight glue, and the optical receiving component installation cavity body (71) and the second sealing cover plate are sealed using watertight glue.

8. The optical watertight travel switch according to claim 4, characterized in that: The optical generating component (2) comprises a light source driving printed circuit board (21) fixed inside the optical generating component mounting cavity body (61) and a light emitting light source (22) connected to the light source driving printed circuit board (21); The optical receiving component (3) comprises a photoelectric conversion device driving printed circuit board (31) fixed inside the optical receiving component mounting cavity body (71) and a photoelectric conversion device (32) connected to the photoelectric conversion device driving printed circuit board (31); The luminous light source (22) is a collimated light device or a divergent light device, and the photoelectric conversion device (32) is an electric vacuum device or a photoelectric device.

9. An optical watertight travel switch according to claim 8, characterized in that: The light source (22) is a semiconductor laser or a diode; The photoelectric conversion device (32) is any one of the following: a phototube, a photomultiplier tube, a photoresistor, a phototransistor and a CCD.

10. The optical watertight travel switch according to claim 1, characterized in that: It also includes a cable (8) connected to the optical generating component (2) and the optical receiving component (3), a power supply module and a signal processing module.

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