Underwater self-locking rotary switch and underwater equipment

Abstract

The utility model provides an underwater self-locking rotary switch and underwater equipment, and relates to the technical field of underwater equipment, the underwater self-locking rotary switch comprises a shell assembly and a knob, the shell assembly is internally provided with a cavity, the cavity is internally provided with a knob switch, and the side wall of the cavity is provided with a limiting groove; the first end of the knob is provided with a pressing part, the second end of the knob is inserted into the cavity, the second end of the knob is connected with the knob switch in an inserted mode, the second end of the knob is provided with a limiting piece, and the knob is suitable for being switched between an inserted state and a pulled-out state; in the insertion state, the limiting piece is in limiting fit with the limiting groove to prevent the knob from axially rotating; and in the pull-out state, the limiting piece is separated from the limiting groove. A limiting piece is arranged at the second end of a knob, and a limiting groove is formed in the inner wall of a cavity; in the inserted state, the limiting piece is matched with the limiting groove in a limiting mode to prevent the rotary knob from rotating axially, the self-locking function of the underwater switch is achieved, misoperation is avoided, the safety of the underwater switch is improved, and the underwater switch is more convenient to use.

Description

Technical Field

[0001] The utility model relates to the technical field of underwater equipment, in particular to an underwater self-locking rotary switch and underwater equipment. Background Art

[0002] An underwater switch is a switch that can be immersed in water or other liquids without malfunctioning. Generally, the waterproof level of an underwater switch is high. The higher the waterproof level, the greater the maximum water depth that the underwater switch can be used in. Existing underwater switches do not have a self-locking function, so they are prone to accidental contact during use, causing the switch to automatically open or close, which is inconvenient to use. Utility Model Content

[0003] The utility model provides an underwater self-locking rotary switch, which is used to solve the problem that the existing underwater switch has no self-locking function.

[0004] The utility model provides an underwater self-locking rotary switch, comprising:

[0005] The housing assembly has a cavity inside, a knob switch is arranged in the cavity, and a limit groove is arranged on the side wall of the cavity;

[0006] A knob, wherein a pressing portion is provided at the first end of the knob, the second end of the knob is inserted into the cavity, the second end of the knob is plug-connected with the knob switch, and a limiting member is provided at the second end of the knob, and the knob is suitable for switching between an inserted state and a pulled-out state; in the inserted state, the limiting member cooperates with the limiting groove to prevent the knob from axially rotating; in the pulled-out state, the limiting member is separated from the limiting groove, and the knob can be axially rotated to drive the knob switch to open or close.

[0007] According to an underwater self-locking rotary switch provided in an embodiment of the utility model, the housing assembly comprises:

[0008] A top cover is provided with a first through hole cavity;

[0009] A partition, the top cover is arranged on a first side of the partition, the partition is provided with a second through hole cavity, and the second end of the knob is inserted into the second through hole cavity and the first through hole cavity;

[0010] The bottom shell is arranged on the second side of the partition, and the bottom shell is provided with a mounting cavity. The second through hole cavity is connected with the mounting cavity and the first through hole cavity to form the cavity; the knob switch is located in the mounting cavity.

[0011] According to an underwater self-locking rotary switch provided by an embodiment of the utility model, the limit groove is located on the side wall of the first through hole cavity, and the side wall of the first through hole cavity is provided with a guide groove connected to the limit groove; in the pulled-out state, the limit member slides in cooperation with the guide groove.

[0012] According to an underwater self-locking rotary switch provided by an embodiment of the utility model, the guide groove extends along the circumferential direction, and the limit groove extends along the axial direction of the knob.

[0013] According to an embodiment of the utility model, an underwater self-locking rotary switch is provided, which also includes:

[0014] The rotating shaft is rotatably arranged in the second through hole cavity, the first end of the rotating shaft is plug-connected with the second end of the knob, and the second end of the rotating shaft is plug-connected with the knob switch.

[0015] According to an underwater self-locking rotary switch provided by an embodiment of the utility model, the second end of the knob is provided with a first plug-in slot, the first end of the rotating shaft is provided with a first plug-in portion, and the first plug-in portion is inserted into the first plug-in slot; the second end of the rotating shaft is provided with a second plug-in portion, and the knob switch is provided with a second plug-in slot, and the second plug-in portion is inserted into the second plug-in slot.

[0016] According to an underwater self-locking rotary switch provided by an embodiment of the utility model, a limiting step is provided inside the first through hole cavity, and a limiting stop ring is provided on the outer peripheral surface of the second end of the knob; in the pulled-out state, the limiting stop ring abuts against the limiting step.

[0017] According to an underwater self-locking rotary switch provided by an embodiment of the utility model, the outer peripheral surface of the second end of the knob is sealed with the inner wall of the first through hole cavity through a first sealing ring.

[0018] According to an underwater self-locking rotary switch provided by an embodiment of the utility model, the side of the partition facing the top cover is sealed with the top cover through a second sealing ring; the side of the partition facing the bottom shell is sealed with the bottom shell through a third sealing ring.

[0019] The utility model also provides an underwater device, comprising an underwater device body and any one of the above-mentioned underwater self-locking rotary switches, wherein a housing component is connected to the underwater device body.

[0020] The underwater self-locking rotary switch provided by the embodiment of the utility model is provided with a limit piece at the second end of the knob and a limit groove on the inner wall of the cavity; in the inserted state, the limit piece cooperates with the limit groove to prevent the axial rotation of the knob, thereby realizing the self-locking function of the underwater switch, avoiding misoperation, improving the safety of the underwater switch, and making it more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 It is a three-dimensional structural schematic diagram of an underwater self-locking rotary switch provided by an embodiment of the utility model;

[0023] Figure 2 It is a three-dimensional exploded schematic diagram of an underwater self-locking rotary switch provided by an embodiment of the utility model;

[0024] Figure 3 It is a schematic diagram of the top view of the underwater self-locking rotary switch provided by an embodiment of the utility model;

[0025] Figure 4 It is a side cross-sectional structural schematic diagram of an underwater self-locking rotary switch provided by an embodiment of the utility model;

[0026] Figure 5 It is a three-dimensional structural schematic diagram of a partition provided in an embodiment of the utility model.

[0027] Reference numerals:

[0028] 10. Shell assembly; 11. Knob switch; 13. Top cover; 14. Partition; 15. Bottom shell; 16. Limit retaining ring; 17. First sealing ring; 18. Second sealing ring; 19. Third sealing ring; 20. Knob; 21. Pressing part; 22. Limiting member; 23. First plug-in slot; 24. Connecting part; 25. Retaining ring; 30. Rotating shaft; 31. First plug-in part; 32. Second plug-in part; 33. Second plug-in slot; 130. First through hole cavity; 131. Limiting groove; 132. Guide groove; 140. Second through hole cavity; 150. Installation cavity. DETAILED DESCRIPTION

[0029] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0030] In the description of the embodiments of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0031] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0032] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0033] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model embodiment. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0034] Combine the following Figure 1-Figure 5 An underwater self-locking rotary switch according to an embodiment of the utility model is described.

[0035] Figure 1 The three-dimensional structure diagram of the underwater self-locking rotary switch provided by the embodiment of the utility model is illustrated. Figure 2 The three-dimensional exploded schematic diagram of the underwater self-locking rotary switch provided by the embodiment of the utility model is illustrated as follows: Figure 1 and Figure 2 As shown, the underwater self-locking rotary switch includes a housing assembly 10 and a knob 20. The housing assembly 10 has a cavity inside, which provides a sealed installation space for the knob switch 11, the rotating shaft 30 and the knob 20. The cavity extends along the axis of the knob 20, and the knob switch 11 is arranged in the cavity. The side wall of the cavity is provided with a limiting groove 131.

[0036] Figure 3 The schematic diagram of the top view of the underwater self-locking rotary switch provided by the embodiment of the utility model is illustrated as follows: Figure 3 As shown, a pressing portion 21 is provided at the first end of the knob 20. The pressing portion 21 is in the shape of a disk. The outer diameter of the pressing portion 21 is larger than the outer diameter of the knob 20 to increase the contact surface when the user operates, making it easier for the user to operate. In order to prevent the pressing portion 21 from slipping during rotation, the pressing portion 21 can be set to be in the shape of a long strip; of course, the pressing portion 21 can also be in the shape of a rectangle, a regular pentagon or other shapes.

[0037] The knob 20 is a round rod-shaped structure, and the second end of the knob 20 is inserted into the cavity. The second end of the knob 20 is plugged into the knob switch 11. A limit member 22 is provided at the second end of the knob 20, and the knob 20 is suitable for switching between an inserted state and an unplugged state; in the inserted state, the limit member 22 cooperates with the limit groove 131 to prevent the knob 20 from axially rotating; in the unplugged state, the limit member 22 is separated from the limit groove 131, and the knob 20 can be axially rotated at this time to drive the knob switch 11 to open or close.

[0038] The underwater self-locking rotary switch provided by the embodiment of the utility model is provided with a limit piece 22 at the second end of the knob 20, and a limit groove 131 is provided on the inner wall of the cavity; in the inserted state, the limit piece 22 and the limit groove 131 are limitedly cooperated to prevent the axial rotation of the knob 20, thereby realizing the self-locking function of the underwater switch, avoiding misoperation, improving the safety of the underwater switch, and making it more convenient to use.

[0039] In one embodiment of the utility model, the limiting member 22 is a pin, and a pin hole is provided at the second end of the knob 20. The limiting member 22 is inserted into the pin hole. Both ends of the limiting member 22 protrude from the outer peripheral surface of the second end of the knob 20 to cooperate with the limiting groove 131. The limiting member 22 can also be integrally formed with the knob 20. Of course, the specific type of the limiting member 22 is not limited to this, and it can also be a bump or a protrusion.

[0040] In one embodiment of the present invention, the underwater self-locking rotary switch further includes a circuit board, which is disposed in the mounting cavity 150 . The circuit board is electrically connected to the knob switch 11 , and the knob switch 11 controls the operation and stop of the circuit board.

[0041] In one embodiment of the present invention, Figure 4 The schematic diagram of the side cross-sectional structure of the underwater self-locking rotary switch provided by the embodiment of the utility model is illustrated as follows: Figure 4 As shown, the housing assembly 10 includes a top cover 13, a partition 14 and a bottom shell 15. The top cover 13 is provided with a first through hole cavity 130. Both ends of the first through hole cavity 130 are open so that the knob 20 can pass through the top cover 13. The cross section of the first through hole cavity 130 is circular so that the knob 20 can rotate relative to the top cover 13. The top cover 13 is provided on the first side of the partition 14, and the top cover 13 is connected to the partition 14 and the bottom shell 15 by screws; specifically, the partition 14 and the bottom shell 15 are both provided with screw through holes, and there are multiple screw through holes. The screw through holes of the partition 14 and the screw through holes of the bottom shell 15 are on the same straight line, and the screws pass through the screw through holes of the bottom shell 15 and the screw through holes of the partition 14 in sequence and then are threadedly matched with the top cover 13.

[0042] The partition 14 is provided with a second through hole cavity 140, and the second end of the knob 20 is inserted into the second through hole cavity 140 and the first through hole cavity 130. The bottom shell 15 is provided on the second side of the partition 14, and the bottom shell 15 is connected to the partition 14 by screws; specifically, the partition 14 is provided with a screw through hole, and the bottom shell 15 is provided with a threaded blind hole, and the partition 14 is threadedly matched with the threaded blind hole through the screw in the screw through hole.

[0043] The bottom shell 15 is provided with a mounting cavity 150 , and the second through hole cavity 140 is connected with the mounting cavity 150 and the first through hole cavity 130 to form a cavity; the knob switch 11 is located in the mounting cavity 150 .

[0044] It should be noted that the specific structure of the shell assembly 10 is not limited to the top cover 13, the partition 14 and the bottom shell 15. The partition 14 and the bottom shell 15 can also be integrally formed, or the top cover 13 and the partition 14 can be integrally formed.

[0045] In one embodiment of the present invention, a connecting portion 24 is provided on a side of the bottom shell 15 facing away from the partition 14 , and the connecting portion 24 is used to connect with underwater equipment.

[0046] Furthermore, the outer peripheral surface of the connection part 24 is provided with threads, and the connection part 24 is threadedly connected to the underwater equipment. Of course, the connection method of the connection part 24 and the underwater equipment is not limited thereto, and a card connection or plug connection method can also be adopted.

[0047] Furthermore, the interior of the connecting portion 24 is hollow and communicates with the installation cavity 150 , and a wire is passed through the interior of the connecting portion 24 , and the circuit board is electrically connected to the underwater device through the wire.

[0048] Furthermore, a first annular groove is provided on a side of the bottom shell 15 facing away from the partition 14 , a fourth sealing ring is provided in the first annular groove, and the bottom shell 15 is sealed with the underwater equipment through the fourth sealing ring.

[0049] In one embodiment of the present invention, Figure 5 The three-dimensional structure diagram of the partition provided by the embodiment of the utility model is illustrated as follows: Figure 5 As shown, two limiting grooves 131 are provided, and the two limiting grooves 131 are symmetrically arranged. The two limiting grooves 131 correspond to the two ends of the limiting member 22 one by one, and the limiting grooves 131 extend along the axial direction of the knob 20 .

[0050] In one embodiment of the utility model, the limiting groove 131 is located on the side wall of the first through hole cavity 130, and the side wall of the first through hole cavity 130 is provided with a guide groove 132 connected with the limiting groove 131, and two guide grooves 132 are provided, and the guide grooves 132 extend along the circumferential direction, and the guide grooves 132 are a section of arc-shaped groove body. In the inserted state, the two ends of the limiting member 22 are inserted into the corresponding limiting grooves 131. Due to the limiting effect of the limiting grooves 131, the knob 20 cannot rotate the shaft, and the underwater self-locking rotary switch cannot be opened and closed; when the underwater self-locking rotary switch and the underwater equipment are used underwater, due to the water pressure, the water will generate a force perpendicular to the pressing part 21 on the surface of the pressing part 21 to prevent the knob 20 from being ejected, and achieve a self-locking effect, and as the underwater depth increases, the water pressure increases accordingly.

[0051] In the pulled-out state, the stopper 22 slides with the guide groove 132. In the process of switching from the inserted state to the pulled-out state, the two ends of the stopper 22 enter the guide groove 132 from the stopper groove 131, and the two ends of the stopper 22 slide in the corresponding guide groove 132, thereby realizing the rotation of the knob 20. In this embodiment, the stopper groove 131 is located at one end of the guide groove 132. Of course, the stopper groove 131 can also be located in the middle of the guide groove 132. Furthermore, in order to reduce the resistance of the stopper 22 during movement, the connection between the stopper groove 131 and the guide groove 132 is rounded.

[0052] In one embodiment of the utility model, the underwater self-locking rotary switch also includes a rotating shaft 30, which is rotatably disposed in the second through hole cavity 140, and the first end of the rotating shaft 30 is plug-connected with the second end of the knob 20, and the second end of the rotating shaft 30 is plug-connected with the knob switch 11, and the rotating shaft 30 is used to connect the knob 20 and the knob switch 11.

[0053] Specifically, the second end of the knob 20 is provided with a first plug-in slot 23, the first plug-in slot 23 forms an opening at the end of the second end of the knob 20, the first plug-in portion 31 is inserted into the first plug-in slot 23 through the opening, and the two ends of the first plug-in slot 23 extend to the outer peripheral surface of the second end of the knob 20. The first end of the rotating shaft 30 is provided with a first plug-in portion 31, the cross section of the first plug-in portion 31 is rectangular, and can also be a triangle, a square or other shapes. The first plug-in portion 31 is inserted into the first plug-in slot 23, and the first plug-in portion 31 and the first plug-in slot 23 are slidably matched along the axis of the knob 20, so that the knob 20 can be switched between the inserted state and the unplugged state, and it can be ensured that the knob 20 and the rotating shaft 30 will not rotate relative to each other in the axial direction. The depth of the first plug-in portion 31 inserted into the first plug-in slot 23 in the inserted state is greater than the depth of the first plug-in portion 31 inserted into the first plug-in slot 23 in the unplugged state, so that the knob 20 and the rotating shaft 30 can be in a connected state when used.

[0054] Of course, the plug-in connection between the first end of the shaft 30 and the second end of the knob 20 is not limited thereto, and a first plug-in portion 31 may be provided at the second end of the knob 20, and a first plug-in groove 23 may be provided at the first end of the shaft 30, and the above-mentioned plug-in connection may also be realized.

[0055] The second end of the rotating shaft 30 is provided with a second plug-in portion 32, and the cross-section of the second plug-in portion 32 is rectangular, and of course, it can also be a triangle, a square or other shapes. The knob switch 11 is provided with a second plug-in slot 33, and the second plug-in portion 32 is inserted into the second plug-in slot 33. The plug-in connection method can facilitate the assembly of the knob 20, simplify the assembly process, and improve production efficiency. Of course, the plug-in connection method between the second end of the rotating shaft 30 and the knob switch 11 is not limited to this. The second plug-in slot 33 can also be provided at the second end of the rotating shaft 30, and the second plug-in portion 32 can be provided on the knob switch 11, and the plug-in connection method between the second end of the rotating shaft 30 and the knob switch 11 can also be realized.

[0056] In a preferred embodiment of the utility model, in the inserted state, there is a gap between the second end of the knob 20 and the first plug-in portion 31 in the axial direction of the knob 20 to prevent the knob 20 from transmitting pressure to the knob switch 11 and causing damage to the knob switch 11.

[0057] Furthermore, in the inserted state, the pressing portion 21 abuts against the top cover 13 to transmit the pressure to the housing assembly 10 to prevent the internal structure of the underwater self-locking rotary switch from being damaged.

[0058] In one embodiment of the utility model, a limiting step is provided inside the first through hole cavity 130, and the limiting step is used to cooperate with the limiting stop ring 16 to prevent the knob 20 from being completely pulled out. The outer circumference of the second end of the knob 20 is provided with a limiting stop ring 16. Specifically, the outer circumference of the second end of the knob 20 is provided with a clamping groove, and the knob 20 and the rotating shaft 30 are in a C shape. The limiting stop ring 16 is clamped in the clamping groove. The limiting stop ring 16 is used to limit the knob 20, which has the advantage of easy assembly. The outer diameter of the limiting stop ring 16 is smaller than the inner diameter of the limiting step. In the pulled-out state, the limiting stop ring 16 abuts against the limiting step.

[0059] In one embodiment of the present invention, the outer circumference of the second end of the knob 20 is sealed with the inner wall of the first through hole cavity 130 through the first sealing ring 17. Specifically, the outer circumference of the second end of the knob 20 is provided with an annular mounting groove, the first sealing ring 17 is provided in the annular mounting groove, the first sealing ring 17 is sealed with the inner wall of the first through hole cavity 130, and the sealing cooperation between the knob 20 and the top cover 13 is realized. Preferably, a retaining ring 25 is also provided in the annular mounting groove, the retaining ring 25 is made of a metal or plastic with relatively high hardness, and the retaining ring 25 is located on the side of the first sealing ring 17 facing the partition 14. The provision of the retaining ring 25 can prevent the first sealing ring 17 from being deformed due to being subjected to relatively high pressure, thereby improving the sealing performance of the first sealing ring 17.

[0060] In one embodiment of the utility model, the side of the partition 14 facing the top cover 13 is sealed with the top cover 13 through the second sealing ring 18. Specifically, a second annular groove is provided on the side of the partition 14 facing the top cover 13, screw through holes are arranged on the outer periphery of the second annular groove, and the second sealing ring 18 is provided in the second annular groove to seal the gap between the partition 14 and the top cover 13.

[0061] The side of the partition 14 facing the bottom shell 15 is sealed with the bottom shell 15 through the third sealing ring 19. Specifically, a third annular groove is provided on the side of the partition 14 facing the bottom shell 15, screw through holes are arranged on the outer periphery of the third annular groove, and the third sealing ring 19 is provided in the third annular groove to seal the gap between the partition 14 and the bottom shell 15.

[0062] The utility model further provides an underwater device, which includes an underwater device body and the underwater self-locking rotary switch described in any one of the above embodiments, and a housing component 10 is connected to the underwater device body.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. An underwater self-locking rotary switch, characterized in that: include: The housing assembly has a cavity inside, a knob switch is arranged in the cavity, and a limit groove is arranged on the side wall of the cavity; A knob, wherein a pressing portion is provided at the first end of the knob, the second end of the knob is inserted into the cavity, the second end of the knob is plug-connected with the knob switch, and a limiting member is provided at the second end of the knob, and the knob is suitable for switching between an inserted state and a pulled-out state; in the inserted state, the limiting member cooperates with the limiting groove to prevent the knob from axially rotating; in the pulled-out state, the limiting member is separated from the limiting groove, and the knob can be axially rotated to drive the knob switch to open or close.

2. The underwater self-locking rotary switch according to claim 1, characterized in that: The housing assembly comprises: A top cover is provided with a first through hole cavity; A partition, the top cover is arranged on a first side of the partition, the partition is provided with a second through hole cavity, and the second end of the knob is inserted into the second through hole cavity and the first through hole cavity; The bottom shell is arranged on the second side of the partition, and the bottom shell is provided with a mounting cavity. The second through hole cavity is connected with the mounting cavity and the first through hole cavity to form the cavity; the knob switch is located in the mounting cavity.

3. The underwater self-locking rotary switch according to claim 2, characterized in that: The limiting groove is located on the side wall of the first through hole cavity, and the side wall of the first through hole cavity is provided with a guide groove connected with the limiting groove; in the pulled-out state, the limiting member is slidably matched with the guide groove.

4. The underwater self-locking rotary switch according to claim 3, characterized in that: The guide groove extends along the circumferential direction, and the limiting groove extends along the axial direction of the knob.

5. The underwater self-locking rotary switch according to any one of claims 2 to 4, characterized in that: Also includes: The rotating shaft is rotatably arranged in the second through hole cavity, the first end of the rotating shaft is plug-connected with the second end of the knob, and the second end of the rotating shaft is plug-connected with the knob switch.

6. The underwater self-locking rotary switch according to claim 5, characterized in that: The second end of the knob is provided with a first plug-in slot, the first end of the rotating shaft is provided with a first plug-in portion, and the first plug-in portion is inserted into the first plug-in slot; the second end of the rotating shaft is provided with a second plug-in portion, the knob switch is provided with a second plug-in slot, and the second plug-in portion is inserted into the second plug-in slot.

7. The underwater self-locking rotary switch according to any one of claims 2 to 4, characterized in that: A limit step is arranged inside the first through hole cavity, and a limit stop ring is arranged on the outer peripheral surface of the second end of the knob; in the pulled-out state, the limit stop ring abuts against the limit step.

8. The underwater self-locking rotary switch according to any one of claims 2 to 4, characterized in that: The outer peripheral surface of the second end of the knob is sealed with the inner wall of the first through hole cavity through a first sealing ring.

9. The underwater self-locking rotary switch according to any one of claims 2 to 4, characterized in that: The side of the partition facing the top cover is sealed with the top cover through a second sealing ring; the side of the partition facing the bottom shell is sealed with the bottom shell through a third sealing ring.

10. An underwater device, characterized in that: It comprises an underwater equipment body and the underwater self-locking rotary switch according to any one of claims 1 to 9, wherein the housing assembly is connected to the underwater equipment body.

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