Compact shockproof underwater sealing device switch

Abstract

The application relates to the technical field of underwater sealing devices, in particular to a compact anti-impact underwater sealing device cabin switch. The compact anti-impact underwater sealing device cabin switch comprises an extracabin fastening and an intracabin fastening with a T-shaped cross section, a cabin-penetrating sealing shaft, a semicircular pull ring rotatably arranged at the top end of the cabin-penetrating sealing shaft, a spring cover and a spring which are sleeved on the cabin-penetrating sealing shaft in a slidable mode, a female spring needle and a male spring needle; the spring cover is arranged below the pull ring, the top end of the spring is arranged on the lower surface of the spring cover and the bottom end of the spring is arranged on the lower half of the cabin-penetrating sealing shaft. The upper surface of the extracabin fastening is uniformly provided with a plurality of fixed holes in the circumferential direction, and the pull ring is provided with fixed insertion rods matched with the fixed holes. The switch scheme only needs to lift the pull ring during power-on and power-off processes, and the pull ring is placed down again after being rotated by half a circle, so that the seal of the underwater sealing device is not damaged, the operation is simple and convenient, and the time consumption is short.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of underwater sealing devices, in particular to a compact anti-impact underwater sealing device out-of-cabin switch. BACKGROUND

[0002] As an underwater operating platform powered by a battery, an underwater autonomous vehicle and other underwater sealing devices need to be controlled from outside the cabin to turn on or off the power. In the existing design, the watertight cover needs to be opened to complete the power-on operation, and then the watertight cover needs to be closed again. The whole operation process is relatively cumbersome and time-consuming, and there is a possibility of damage to the sealing ring during repeated disassembly and assembly, which threatens the sealing performance of the underwater sealing device.

[0003] If multiple underwater sealing devices are powered on, especially on a transport aircraft, the operation conditions are poor, making it unrealistic to repeatedly disassemble and assemble the watertight cover. Therefore, the existing technology of opening the watertight cover to complete the power-on operation is not suitable for the application scenario of underwater sealing device air drop.

[0004] In order to solve this problem, some underwater sealing devices have begun to apply sealing switches from other fields. However, since seawater will impact the out-of-cabin switch of the underwater sealing device during air drop, these out-of-cabin switches that have not been specially optimized cannot resist the impact and may cause unexpected power-off.

[0005] Some large underwater sealing devices use professional out-of-cabin switches, but these switches have complex structures, large axial lengths, and large space occupation, which are not suitable for application in small underwater sealing devices and can only be applied in large underwater sealing devices. SUMMARY

[0006] The present application provides a compact anti-impact underwater sealing device out-of-cabin switch to solve the problem that the control switch of the existing underwater sealing device is located in the watertight cabin and the operation is cumbersome.

[0007] In addition, the present application also aims to provide an out-of-cabin switch that can resist seawater impact during air drop and has a simple structure and small space occupation.

[0008] To achieve the above-mentioned purposes, the technical scheme of the present application is as follows:

[0009] The present application provides a compact anti-impact underwater sealing device out-of-cabin switch, which comprises a "T"-shaped out-of-cabin fastening and in-cabin fastening, a through-cabin sealing shaft, a semicircular pull ring rotatably arranged at the top end of the through-cabin sealing shaft, a spring cover and a spring slidably sleeved on the through-cabin sealing shaft, a female spring needle, and a male spring needle; the spring cover is arranged below the pull ring, the top end of the spring is abutted against the lower surface of the spring cover, and the bottom end is abutted against the lower half of the through-cabin sealing shaft.

[0010] The upper surface of the out-cabin fastener is uniformly provided with a plurality of fixing holes in the circumferential direction, and the pull ring is provided with fixing insertion rods matched with the fixing holes; the out-cabin fastener and the in-cabin fastener are both middle-through structures, the out-cabin fastener is arranged in the through hole of the in-cabin fastener through the mounting hole of the sealed cabin shell, and the out-cabin fastener is sealingly arranged with the sealed cabin shell;

[0011] The through-cabin sealing shaft is arranged in the through hole of the out-cabin fastener, and the lower half of the through-cabin sealing shaft is sealingly arranged with the inner wall of the through hole of the out-cabin fastener;

[0012] The spring needle female is arranged at the bottom end of the through-cabin sealing shaft and in the lower half of the through hole of the in-cabin fastener, the spring needle female can rotate synchronously with the through-cabin sealing shaft, and the spring needle male is arranged on the side wall of the lower half of the through hole of the in-cabin fastener.

[0013] In an embodiment, the out-cabin fastener comprises an out-cabin fastener cap and an out-cabin fastener column arranged below the out-cabin fastener cap, the upper surface of the out-cabin fastener cap is uniformly provided with a plurality of fixing holes in the circumferential direction, the lower surface of the out-cabin fastener cap is provided with an annular sealing groove, the annular sealing groove of the out-cabin fastener cap is arranged with an annular sealing ring I, and the outer surface of the lower half of the out-cabin fastener column is provided with external thread.

[0014] In an embodiment, the top end of the out-cabin fastener is arranged with a mounting groove in the shape of a trapezoid in cross section, which communicates with the through hole of the out-cabin fastener.

[0015] In an embodiment, the in-cabin fastener comprises an in-cabin fastener cap and an in-cabin fastener column arranged below the in-cabin fastener cap.

[0016] In an embodiment, the upper part of the through hole of the in-cabin fastener is provided with internal thread, the side wall of the lower part of the through hole of the in-cabin fastener is provided with a mounting hole, and the spring needle male is arranged in the mounting hole of the side wall of the in-cabin fastener through a spring needle insulation sleeve.

[0017] In an embodiment, the top end of the through-cabin sealing shaft is arranged with an axial hole perpendicular to the axis, and the pull ring is rotatably arranged in the axial hole through a pin shaft or a bolt; the bottom end of the through-cabin sealing shaft is arranged with an expansion part.

[0018] In an embodiment, the expansion part of the through-cabin sealing shaft is arranged with an annular sealing groove, and the annular sealing groove of the expansion part is arranged with a sealing ring II.

[0019] In an embodiment, the lower surface of the expansion part is provided with a threaded hole extending inwardly, the through-bulkhead transmission is arranged below the expansion part, the spring pin female is arranged below the through-bulkhead transmission, and the fixing screw is screwed with the threaded hole of the expansion part through the spring pin female and the through-bulkhead transmission.

[0020] In an embodiment, the upper and lower surfaces of the through-bulkhead transmission are respectively provided with a plurality of grooves, the lower surface of the expansion part is provided with a plurality of protrusions I, and the upper surface of the spring pin female is provided with a plurality of protrusions II, the protrusions I are embedded in the grooves of the upper surface of the through-bulkhead transmission, and the protrusions II are embedded in the grooves of the lower surface of the through-bulkhead transmission.

[0021] In an embodiment, the outer side of the spring pin male is provided with a plurality of lead feet.

[0022] The present application has the following beneficial effects:

[0023] 1) The switch scheme only needs to lift the pull ring during power-on and power-off, and after rotating half a circle, the pull ring is put down again, without damaging the seal of the underwater sealing device, and the operation is simple and time-saving.

[0024] 2) The switch design is compact, the axial length is short, and is suitable for small underwater sealing devices.

[0025] 3) The switch is designed to prevent impact, which can effectively avoid accidents and power-off caused by impact during air drop. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained according to the structures shown in these drawings without creative labor.

[0027] Fig. 1 is a schematic diagram of the overall structure of the present application.

[0028] Fig. 2 is a sectional view of the present application; the figure is in the power-on state.

[0029] Fig. 3 is a schematic diagram of the structure when the pull ring of the present application is lifted.

[0030] In the figure, 1, out-of-cabin fastening; 11, out-of-cabin fastening cap; 111, fixing hole; 112, sealing ring I; 12, spring cover; 13, out-of-cabin fastening column; 2, in-cabin fastening; 21, in-cabin fastening cap; 22, in-cabin fastening column; 3, cabin-penetrating sealing shaft; 31, expansion part; 311, sealing ring II; 312, protrusion I; 32, cabin-penetrating transmission; 33, cabin-penetrating sealing shaft insulation sleeve; 34, spring pin female; 341, protrusion II; 35, fixing screw; 36, spring; 4, spring pin male; 41, spring pin insulation sleeve; 42, lead pin; 5, pull ring; 51, rotating shaft; 52, fixed insertion rod.

[0031] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments in combination with the accompanying drawings. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0033] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly.

[0034] In addition, if the embodiments of the present application involve descriptions of "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing throughout the text is that it includes three parallel schemes, taking "A and / or B" as an example, including A scheme, or B scheme, or A and B schemes. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist and is not within the protection scope of the present application.

[0035] As Figs. 1-3As shown, the application provides a compact anti-impact underwater sealing device cabin switch, which comprises a cabin fastening 1 and an inner cabin fastening 2 with a cross-section shape of "T" character, a cabin sealing shaft 3, a semicircular pull ring 5 rotatably arranged at the top end of the cabin sealing shaft 3, a spring cover 12 and a spring 36 slidably sleeved on the cabin sealing shaft 3, a spring needle female 34 and a spring needle male 4; the spring cover 12 is arranged below the pull ring 5, the top end of the spring 36 is abutted against the lower surface of the spring cover 12 and the bottom end is abutted against the lower half of the cabin sealing shaft 3.

[0036] The upper surface of the cabin fastening 1 is uniformly provided with a plurality of fixed holes 111 in the circumferential direction, and the pull ring 5 is provided with fixed insertion rods 52 matched with the fixed holes 111; the cabin fastening 1 and the inner cabin fastening 2 are both of a middle-through structure, the cabin fastening 1 is arranged in the through hole of the inner cabin fastening 2 through the mounting hole of the sealing cabin shell, and the cabin fastening 1 is sealingly arranged with the sealing cabin shell.

[0037] The cabin sealing shaft 3 is arranged in the through hole of the cabin fastening 1, and the lower half of the cabin sealing shaft 3 is sealingly arranged with the inner wall of the through hole of the cabin fastening 1.

[0038] The spring needle female 34 is arranged at the bottom end of the cabin sealing shaft 3 and in the lower half of the through hole of the inner cabin fastening 2, and the spring needle female 34 can rotate synchronously with the cabin sealing shaft 3, and the spring needle male 4 is arranged on the side wall of the lower half of the through hole of the inner cabin fastening 2.

[0039] In the embodiment of the application, the whole shape of the cross section of the cabin fastening 1 is "T" character, and the cabin fastening 1 is provided with a through hole along the axis; the cabin fastening 1 is divided into two parts, namely a cabin fastening cap 11 and a cabin fastening column body 13 arranged below the cabin fastening cap 11, and the cabin fastening cap 11 and the cabin fastening column body 13 are both cylindrical. The upper surface of the cabin fastening cap 11 is uniformly provided with a plurality of fixed holes 111 in the circumferential direction, and the fixed holes 111 are used for cooperating with the fixed insertion rods 52 of the pull ring 5 to fix the pull ring 5 and limit the rotation of the pull ring 5 in the horizontal plane; the lower surface of the cabin fastening cap 11 is provided with an annular sealing groove, and an annular sealing ring I 112 is arranged in the annular sealing groove; during installation, the sealing ring I 112 is deformed under the extrusion of the cabin fastening cap 11 and the sealing cabin shell to complete the sealing and prevent seawater from penetrating into the sealing cabin of the underwater sealing device from the mounting hole of the sealing cabin shell.

[0040] The lower half of the outer surface of the out-cabin fastening column 13 is provided with external thread, the through hole of the upper half of the in-cabin fastening 2 is provided with internal thread, the out-cabin fastening column 13 is threadedly connected with the through hole of the in-cabin fastening 2, that is, the out-cabin fastening 1 is inserted into the through hole of the in-cabin fastening 2; by tightening the out-cabin fastening 1, the out-cabin fastening cap 11 cooperates with the in-cabin fastening cap 21 to extrude the seal cabin shell, so that the present application is fixed on the seal cabin shell. The top end of the out-cabin fastening 1 is provided with a mounting groove in the shape of a trapezoid in cross section, which is in communication with the through hole of the out-cabin fastening 1, and is used to limit the accommodation of the spring cover 12.

[0041] In the embodiment of the present application, the in-cabin fastening 2 is in the shape of a "T" in cross section, and is provided with a through hole along the axis; the in-cabin fastening 2 is divided into two parts, namely an in-cabin fastening cap 21 and an in-cabin fastening column 22 arranged below the in-cabin fastening cap 21, and both the in-cabin fastening cap 21 and the in-cabin fastening column 22 are cylindrical. The through hole of the in-cabin fastening 2 is divided into an upper part and a lower part, the upper part is provided with internal thread, and the upper part is threadedly connected with the out-cabin fastening column 13 of the out-cabin fastening 1; the diameter of the upper part is larger than that of the lower part, and the side wall of the lower part is provided with a mounting hole, that is, the side wall of the lower half of the in-cabin fastening 2 is provided with a mounting hole, the spring ejector pin 4 is arranged in the mounting hole of the side wall of the in-cabin fastening 2 through a spring ejector pin insulating sleeve 41, and the spring ejector pin insulating sleeve 41 insulates the spring ejector pin 4 from the in-cabin fastening 2.

[0042] In the embodiment of the present application, the bottom end of the cabin-penetrating sealing shaft 3 is provided with an expansion part 31, and the whole cabin-penetrating sealing shaft is in the shape of a "T" in cross section; the top end of the cabin-penetrating sealing shaft 3 is provided with a shaft hole perpendicular to the axis, and the pull ring 5 is rotatably arranged in the shaft hole through a pin shaft or a bolt, and the pull ring 5 can rotate around the shaft hole; the expansion part 31 of the cabin-penetrating sealing shaft 3 is provided with an annular sealing groove, and the annular sealing groove of the expansion part 31 is provided with a sealing ring II 311, and the cabin-penetrating sealing shaft 3 is sealed with the out-cabin fastening 1 through the sealing ring II 311, so as to prevent seawater from penetrating into the sealed cabin from the through hole of the out-cabin fastening 1.

[0043] The top end of the cabin-penetrating sealing shaft 3 is rotatably provided with a pull ring 5, the cabin-penetrating sealing shaft 3 is sleeved with a spring cover 12 and a spring 36, the spring cover 12 is arranged below the pull ring 5, the spring 36 has a top end abutting against the lower surface of the spring cover 12 and a bottom end abutting against the expansion part 31, and the spring cover 12 and the spring 36 can slide up and down along the cabin-penetrating sealing shaft 3; the spring 36 abuts against the pull ring 5 to limit the pull ring 5 from being lifted. The pull ring 5 limits the cabin-penetrating sealing shaft 3 from sliding out of the through hole of the extravehicular fastener 1 downward, and the following cabin-penetrating transmission 32 limits the cabin-penetrating sealing shaft 3 from sliding out of the through hole of the extravehicular fastener 1 upward. The extravehicular fastener 1, the cabin-penetrating sealing shaft 3, the spring cover 12, the spring 36 and the pull ring 5 jointly realize the anti-impact function, that is, even if the present application is subjected to a greater impact, the pull ring 5 will be firmly locked under the joint action of the spring 36 and the fixed insertion rod 52 and will not rotate to trigger power-off to cause an accident.

[0044] The lower surface of the expansion part 31 is provided with an inwardly extending threaded hole, the cabin-penetrating transmission 32 is arranged below the expansion part 31, the spring needle female 34 is arranged below the cabin-penetrating transmission 32, the fixed screw 35 is threadedly connected with the threaded hole of the expansion part 31 by penetrating the spring needle female 34 and the cabin-penetrating transmission 32, and the fixed screw 35 is insulated from the spring needle female 34 by the cabin-penetrating sealing shaft insulation sleeve 33. The upper and lower surfaces of the cabin-penetrating transmission 32 are respectively provided with a plurality of grooves, the lower surface of the expansion part 31 is provided with a plurality of protrusions I 312, and the upper surface of the spring needle female 34 is provided with a plurality of protrusions II 341; the protrusions I 312 are embedded in the grooves on the upper surface of the cabin-penetrating transmission 32, and the protrusions II 341 are embedded in the grooves on the lower surface of the cabin-penetrating transmission 32; the cabin-penetrating sealing shaft 3, the cabin-penetrating transmission 32, the cabin-penetrating sealing shaft insulation sleeve 33 and the spring needle female 34 form an integral whole, the integral whole rotates to realize the contact and disengagement between the spring needle female 34 and the spring needle male 4, thereby realizing power-on and power-off.

[0045] The cabin-penetrating transmission 32, the cabin-penetrating sealing shaft insulation sleeve 33 and the spring needle insulation sleeve 41 are all made of insulating materials to insulate the circuit in the cabin from the shell of the underwater sealing device.

[0046] In the embodiment of the present application, the spring pin female 34 and the spring pin male 4 are a pair, and the specific details are not described here. The cabin sealing shaft 3, the cabin sealing transmission 32, the cabin sealing shaft insulation sleeve 33, and the spring pin female 34 form an integral whole, the spring pin female 34 can rotate synchronously with the cabin sealing shaft 3, and the spring pin female 34 is arranged in the lower half of the through hole of the cabin inner fastening 2; the spring pin male 4 is arranged in the lower half of the side wall of the through hole of the cabin inner fastening 2, and the outer side of the spring pin male 4 is provided with a plurality of lead pins 42 which can be connected with wires and connected to a loop control power on / off circuit. Specifically, when the spring pin female 34 rotates to a certain angle, the spring pin female 34 contacts the spring pin male 4, the spring pin male 4 is turned on, and the entire circuit is powered on; when the spring pin female 34 rotates 180° on the basis of the angle, the spring pin female 34 is completely separated from the spring pin male 4, and the entire circuit is powered off.

[0047] In the embodiment of the present application, the pull ring 5 is a semicircular ring structure, the pull ring 5 is rotatably arranged at the top end of the cabin sealing shaft 3 through a rotating shaft 51, and the pull ring 5 is provided with a fixed insertion rod 52 matched with the fixed hole 111. In the initial state, the pull ring 5 is laid down, the spring cover 12 is tightly pressed against the side surface of the pull ring 5 under the action of the spring 36, and the pull ring 5 is prevented from being accidentally lifted; when it is necessary to rotate the cabin sealing shaft 3, the pull ring 5 is lifted, the bottom edge of the pull ring 5 extrudes the spring cover 12, the spring 36 is compressed, and the pull ring 5 is pulled up against the resistance of the spring 36 and rotated.

[0048] The present application is clamped on the sealed cabin shell through the threaded connection between the cabin outer fastening 1 and the cabin inner fastening 2. The inner and outer surfaces of the installation position need to be flat. The installation complete state is shown in Fig. 1 (power-on state). The part above the cabin outer fastening 1 is installed outside the cabin, and the part below the cabin inner fastening 2 is installed inside the cabin.

[0049] When the power is on / off, the pull ring 5 (see Fig. 3 ) is lifted, and after rotating half a circle, it is laid down again to embed the fixed insertion rod 52 of the pull ring 5 in the fixed hole 111 of the cabin outer fastening 1, so as to lock the pull ring 5 from rotating. The operation of power on and power off is the same.

[0050] The spring pin male 4 selected in the present scheme has a working voltage ≤36V and a working current ≤2A, which meets the control requirements of existing underwater sealing devices.

[0051] The above merely describes optional embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation made under the inventive concept of the present application, or direct / indirect application in other related technical fields, is included in the patent protection scope of the present application.

Claims

1. A compact shock-proof underwater sealing device switch, characterized in that: The application relates to a through-cabin sealing shaft (3) and a through-cabin sealing device, which comprises an extracabin fastener (1) and an intracabin fastener (2), the extracabin fastener (1) and the intracabin fastener (2) are in the shape of a T, the through-cabin sealing shaft (3) is rotatably arranged at the top end of the extracabin fastener (1), a semicircular pull ring (5) is arranged at the top end of the through-cabin sealing shaft (3), a spring cover (12) and a spring (36) are slidably sleeved on the through-cabin sealing shaft (3), a spring pin female (34) and a spring pin male (4) are arranged on the through-cabin sealing shaft (3). The upper surface of the extracabin fastener (1) is uniformly provided with a plurality of fixed holes (111) in the circumferential direction, the pull ring (5) is provided with fixed insertion rods (52) matched with the fixed holes (111), the extracabin fastener (1) and the intracabin fastener (2) are both in a middle-through structure, the extracabin fastener (1) is arranged in the through hole of the intracabin fastener (2) through an installation hole in a sealed extracabin shell, and the extracabin fastener (1) is sealingly arranged in the sealed extracabin shell. The through-cabin sealing shaft (3) is arranged in the through hole of the extracabin fastener (1), and the lower half of the through-cabin sealing shaft (3) is sealingly arranged in the inner wall of the through hole of the extracabin fastener (1). The spring pin female (34) is arranged at the bottom end of the through-cabin sealing shaft (3) and in the lower half of the through hole of the intracabin fastener (2), the spring pin female (34) can rotate synchronously with the through-cabin sealing shaft (3), and the spring pin male (4) is arranged on the side wall of the lower half of the through hole of the intracabin fastener (2).

2. A compact shock proof underwater sealing device for an off-board switch according to claim 1, characterized in that: The extracabin fastener (1) comprises an extracabin fastener cap (11) and an extracabin fastener column body (13) arranged below the extracabin fastener cap (11), the upper surface of the extracabin fastener cap (11) is uniformly provided with a plurality of fixed holes (111) in the circumferential direction, the lower surface of the extracabin fastener cap (11) is provided with an annular sealing groove, the annular sealing groove of the extracabin fastener cap (11) is provided with an annular sealing ring I (112), and the lower half of the outer surface of the extracabin fastener column body (13) is provided with external thread.

3. A compact shock proof underwater sealing device for an off-board switch according to claim 2, characterized in that: The top end of the extracabin fastener (1) is provided with a trapezoidal installation groove communicated with the through hole of the extracabin fastener (1).

4. A compact shock proof underwater sealing device package for an off-board switch according to claim 1, characterized in that: The intracabin fastener (2) comprises an intracabin fastener cap (21) and an intracabin fastener column body (22) arranged below the intracabin fastener cap (21).

5. A compact shock proof underwater seal device package for an off-board switch according to claim 4, characterized in that: The upper part of the through hole of the intracabin fastener (2) is provided with internal thread, the side wall of the lower part of the through hole of the intracabin fastener (2) is provided with an installation hole, and the spring pin male (4) is arranged in the side wall installation hole of the intracabin fastener (2) through a spring pin insulating sleeve (41).

6. A compact shock proof underwater sealed device package off shore switch as claimed in claim 1 wherein: The top end of the through-cabin sealing shaft (3) is provided with an axial hole perpendicular to the axis, and the pull ring (5) is rotatably arranged in the axial hole through a pin shaft or a bolt; and the bottom end of the through-cabin sealing shaft (3) is provided with an expansion part (31).

7. A compact shock proof underwater seal device package for an off-board switch according to claim 6, characterized in that: The expansion part (31) of the through-cabin sealing shaft (3) is provided with an annular sealing groove, and the annular sealing groove of the expansion part (31) is provided with a sealing ring II (311).

8. A compact shock proof underwater sealing device for an off-board switch according to claim 7, characterized in that: The lower surface of the expansion part (31) is provided with a thread hole extending inwardly, a through-passage transmission (32) is arranged below the expansion part (31), a spring needle female (34) is arranged below the through-passage transmission (32), and a fixing screw (35) is threadedly connected with the thread hole of the expansion part (31) through the spring needle female (34) and the through-passage transmission (32).

9. A compact shock proof underwater seal device for an off-board switch according to claim 8, characterized in that: The upper and lower surfaces of the through-passage transmission (32) are respectively provided with a plurality of grooves, the lower surface of the expansion part (31) is provided with a plurality of protrusions I (312), and the upper surface of the spring needle female (34) is provided with a plurality of protrusions II (341); the protrusions I (312) are embedded in the grooves on the upper surface of the through-passage transmission (32), and the protrusions II (341) are embedded in the grooves on the lower surface of the through-passage transmission (32).

10. A compact shock proof underwater sealing device for an off-board switch according to claim 9, characterized in that: The outer side of the spring needle male (4) is provided with a plurality of lead pins (42).

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