WO2021017555A1

WO2021017555A1 - Waterproof housing for oscilloscope

Info

Publication number: WO2021017555A1
Application number: PCT/CN2020/087613
Authority: WO
Inventors: 贺军; 褚晓忠
Original assignee: 南京瑞贻电子科技有限公司
Priority date: 2019-07-29
Filing date: 2020-04-28
Publication date: 2021-02-04
Also published as: CN110426574A; CN110426574B

Abstract

A waterproof housing for an oscilloscope, comprising an upper cover (1), a base (8), and an annular plastic sealing ring (3). A hollow screw thread sleeve (6) extends integrally upwards on an upper end surface of the base (8). The upper cover (1) is covered on the upper end surface of the base (8), and is rotatably and insertedly connected to the outer wall of the hollow screw thread sleeve (6) by means of an internal screw thread. An annular limiting panel (9) extends integrally downwards on an edge side wall of a bottom end surface of the upper cover (1), and an annular limiting groove (10) positioned to an inner side of the annular limiting panel (9) is opened in an edge position of the bottom end surface of the upper cover (1). The annular plastic sealing ring (3) is positioned between the upper cover (1) and the base (8), and is matched with the inner cavity of the annular limiting groove (10) of the upper cover (1). A matching groove (7) is recessed integrally downwards on an edge side wall of a top end surface of the base (8), and the annular limiting panel (9) is matched with and insertedly connected to the inner cavity of the matching groove (7). The waterproof housing for an oscilloscope is able to improve the waterproof performance of the oscilloscope, and also does not impact use of the oscilloscope with externally connected cables.

Description

Waterproof shell of wave recorder

Technical field

The invention relates to the related technical field of wave recorder waterproof, in particular to a wave recorder waterproof housing.

Background technique

Wave recorders have been widely used in power systems to record transient, steady-state analog and event information of generators, transformers, power transmission lines, power stations, and power plants, monitor power system operation, save test data, record and capture Fault information is an important instrument that provides a basis for studying the operation mode of the power grid and evaluating the performance of the protection device. At present, the shell of the wave recorder is made of plastic or thin metal shell, but these shells in the prior art do not have the waterproof function. The circuit of the wave instrument is affected by the water entering and damp, which will cause the circuit to be short-circuited and affect the actual use. Therefore, a waterproof case of the wave recorder is designed to solve the above problems.

technical problem

The purpose of the present invention is to provide a waterproof housing of a wave recorder to solve the problems raised in the background art.

Technical solutions

In order to achieve the above objective, the present invention provides the following technical solutions: a waterproof housing of a wave recorder, comprising an upper cover, a base and an annular plastic sealing ring, the upper end surface of the base has a hollow threaded sleeve extending upward in the same body, and the upper cover The cover is closed on the upper end surface of the base, and is rotatably inserted into the outer wall of the hollow threaded sleeve through internal threads. The bottom end surface edge side wall of the upper cover has an annular limit plate extending downward in the same body. The bottom end surface edge of the upper cover The position is provided with an annular limiting groove located inside the annular limiting plate, the annular plastic sealing ring is located between the upper cover and the base, and the annular plastic sealing ring matches the inner cavity of the annular limiting groove of the upper cover, the base The edge side wall of the top surface of the top surface is recessed downwardly with a matching groove, and the annular limiting plate is mated and inserted into the inner cavity of the matching groove.

Preferably, the outer wall of the upper cover and the base have the same major diameter.

Preferably, the vertical height of the annular limiting plate is equal to the vertical height of the inner cavity of the matching groove, and the vertical height of the annular plastic sealing ring is equal to the vertical height of the inner cavity of the annular limiting groove.

Preferably, the outer wall of the annular plastic sealing ring is fixedly attached with a first annular hollow sealing gasket, and the inner cavity of the first annular hollow sealing gasket has a rectangular structure, and the outer wall of the first annular hollow sealing gasket is fixedly attached below the outer wall. A second annular hollow sealing gasket is provided, and the inner cavity of the second annular hollow sealing gasket has a circular structure. The inner cavity side wall of the second annular hollow sealing gasket is provided with the inner cavity of the first annular hollow sealing gasket. Ring notch.

Preferably, the first annular hollow sealing gasket is located in the inner cavity of the annular limiting groove, and the second annular hollow sealing gasket is located in the inner cavity of the matching groove.

Preferably, the radial side wall of the upper cover is provided with a waterproof card sleeve card slot, and the inner cavity of the waterproof card sleeve card slot is fixedly inserted with an external signal connection post on the side wall far away from the opening. The inner cavity of the sleeve card slot is slidably inserted with a waterproof card sleeve, and the inner cavity of the waterproof card sleeve card slot and the waterproof card sleeve are both T-shaped structures, and the side wall of the waterproof card sleeve inner cavity far away from the opening is inserted with The external signal connection column is matched with a matching socket sleeve, and a conductive block is inserted into the side wall of the inner cavity of the matching socket sleeve away from the external signal connection column.

Preferably, two vertical PVC plastic springs are arranged between the outer wall of the waterproof ferrule on the side away from the opening and the inner cavity of the waterproof ferrule groove on the side wall away from the opening.

Preferably, the upper and lower side walls of the waterproof ferrule are provided with rectangular holes, and the inner cavities of the two rectangular holes are close to the opening of the waterproof ferrule. The two PVC plastic plates are provided with semicircular stop balls on one side wall away from the inner cavity of the waterproof ferrule, and the upper and lower sides of the inner cavity of the waterproof ferrule slot are provided with a semicircular The semi-circular limit groove matched with the limit ball.

Preferably, the specific method of use is as follows.

(S1). Before use, fix the relevant circuit of the recorder and the integrated circuit board in the cavity of the hollow threaded sleeve on the upper end surface of the base, and then cover the upper cover on the upper end surface of the base, and connect it with The outer wall of the hollow threaded sleeve is rotated and inserted. At the same time, the annular plastic sealing ring is located between the upper cover and the base, and the annular plastic sealing ring matches the inner cavity of the annular limit groove of the upper cover, and the annular limit plate is in the matching groove The cavity is matched and plugged.

(S2). In addition, the first annular hollow sealing gasket is fixedly attached to the outer wall of the annular plastic sealing ring, and the second annular hollow sealing gasket is fixedly attached below the outer wall of the first annular hollow sealing gasket, so that the first annular hollow sealing gasket Located in the inner cavity of the annular limit groove, and the second annular hollow sealing washer is located in the inner cavity of the matching groove, so that when the hollow threaded sleeve of the upper cover and the base is rotated, the second annular hollow sealing washer is pressed by the annular limit plate , Using the bottom end surface of the annular plastic sealing ring to squeeze the first annular hollow sealing washer, and in this process, the first annular hollow sealing washer and the second annular hollow sealing washer are connected through the annular gap, so when the sealing is rotated, the first The space volume between the annular hollow sealing gasket and the second annular hollow sealing gasket can make up for each other. On the one hand, it can avoid crushing the first and second annular hollow sealing gaskets due to excessive internal pressure. On the other hand, it can also pass The volume exchange makes up, improves the sealing effect, and improves the waterproof effect.

(S3). The radial housing of the upper cover is provided with a waterproof ferrule that is relatively isolated from the inner cavity of the upper cover. In a natural state, the waterproof ferrule is affected by the elastic force of the upper and lower springs, and the waterproof ferrule is far away from the groove of the waterproof ferrule The external signal connection post in the inner cavity disconnects the connection path with the external circuit to further improve the waterproof effect. When an external signal cable plug is needed, the external signal cable plug can be directly inserted into the inner cavity of the waterproof ferrule. The signal cable plug can push up the upper and lower two PVC plastic plates, and push the semi-circular limit ball into the semi-circular limit slot to limit the waterproof ferrule from being ejected by the spring from the inner cavity of the waterproof ferrule slot, affecting the external signal line The cable plug is attached to the conductive block and connected with the external signal connection post.

Beneficial effect

1. The present invention is a waterproof housing of a wave recorder. When the hollow threaded sleeve of the upper cover and the base is rotated, the second annular hollow sealing gasket is pressed by the annular limiting plate, so that the second annular hollow sealing gasket is compressed Then it closely fits the outer wall of the annular limit plate, and the bottom end surface of the annular plastic sealing ring is used to squeeze the first annular hollow sealing washer, so that the first annular hollow sealing washer is squeezed and closely fits the outer wall of the annular plastic sealing ring. The connection tightness makes it possible to improve the waterproof performance of the wave recorder.

2. In the present invention, an annular gap is provided between the inner cavity side wall of the second annular hollow sealing gasket and the inner cavity of the first annular hollow sealing gasket, and the space between the first annular hollow sealing gasket and the second annular hollow sealing gasket The volumes can make up for each other. On the one hand, the first annular hollow sealing gasket and the second annular hollow sealing gasket can be prevented from being crushed due to excessive internal pressure. On the other hand, the volume exchange can be used to make up for the sealing effect and the waterproof effect.

3. In the present invention, the radial housing of the upper cover is provided with a waterproof ferrule which is relatively isolated from the inner cavity of the upper cover. In a natural state, the waterproof ferrule is affected by the elastic force of the upper and lower springs, and the waterproof ferrule is far away from the waterproof ferrule. The external signal connection post in the cavity of the slot disconnects the connection path with the external circuit to further improve the waterproof effect. When an external signal cable plug is required, the external signal cable plug can be directly inserted into the internal cavity of the waterproof ferrule. At the same time, The external signal cable plug can push up the upper and lower two PVC plastic plates, and push the semi-circular limit ball into the semi-circular limit slot to restrict the waterproof ferrule from being ejected by the spring from the inner cavity of the waterproof ferrule slot, affecting the external signal The cable plug is attached to the conductive block and connected to the external signal connection column, which does not affect the use of the external cable of the recorder.

Description of the drawings

Figure 1 is an exploded view of the main structure of the present invention.

Figure 2 is a cross-sectional view of the upper cover structure of the present invention.

Figure 3 is a cross-sectional view of the annular plastic sealing ring of the present invention.

Figure 4 is a partial cross-sectional view of the upper cover of the present invention.

In the picture: 1. Upper cover; 2. Waterproof ferrule; 3. Annular plastic sealing ring; 4. First annular hollow sealing gasket; 5. Second annular hollow sealing gasket; 6. Hollow threaded sleeve; 7. Matching recess Slot; 8, base; 9, ring-shaped limit plate; 10, ring-shaped limit slot; 11, ring-shaped gap; 12, external signal connection column; 13, PVC plastic spring; 14, semi-circular limit slot; 15, half Round limit ball; 16, PVC plastic board; 17, conductive block; 18, matching plug sleeve; 19, waterproof card sleeve card slot.

Embodiments of the invention

The embodiments of this application solve the problems raised in the prior art by providing a waterproof housing of the wave recorder; the following will clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only It is a part of the embodiments of the present invention, not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

Please refer to Figures 1-4. This embodiment provides a waterproof housing of a wave recorder, which includes an upper cover 1, a base 8 and an annular plastic sealing ring 3. The upper end surface of the base 8 has a hollow threaded sleeve 6 extending upward in the same body. The cover 1 is closed on the upper end surface of the base 8, and is rotated and inserted into the outer wall of the hollow threaded sleeve 6 through internal threads. The edge side wall of the bottom end surface of the upper cover 1 extends downwardly with a ring-shaped limiting plate 9, and the upper cover 1 An annular limit groove 10 located inside the annular limit plate 9 is provided on the edge of the bottom end surface. The annular plastic sealing ring 3 is located between the upper cover 1 and the base 8, and the annular plastic sealing ring 3 and the annular limit groove of the upper cover 1 The inner cavity of 10 is matched, the top edge side wall of the base 8 is recessed downwardly with a matching groove 7, and the annular limit plate 9 is mated and inserted into the inner cavity of the matching groove 7.

The outer wall of the upper cover 1 and the base 8 have the same large diameter, so that the matching installation is not affected.

The vertical height of the annular limit plate 9 is equal to the vertical height of the inner cavity of the matching groove 7, and the vertical height of the annular plastic sealing ring 3 is equal to the vertical height of the inner cavity of the annular limit groove 10, which will not increase the installation size error.

The outer wall of the annular plastic sealing ring 3 is fixedly attached with a first annular hollow sealing gasket 4, and the inner cavity section of the first annular hollow sealing gasket 4 is a rectangular structure. Two annular hollow sealing gaskets 5, and the inner cavity of the second annular hollow sealing gasket 5 has a circular structure, and the inner cavity side wall of the second annular hollow sealing gasket 5 is provided with a cavity communicating with the inner cavity of the first annular hollow sealing gasket 4 The annular gap 11, the space volume between the first annular hollow sealing gasket 4 and the second annular hollow sealing gasket 5 can make up for each other, on the one hand, avoid crushing the first annular hollow sealing gasket 4 and the second annular hollow gasket due to excessive internal pressure On the other hand, the sealing gasket 5 can also be compensated by volume exchange to improve the sealing effect and the waterproof effect.

The first annular hollow sealing washer 4 is located in the inner cavity of the annular limiting groove 10, and the second annular hollow sealing washer 5 is located in the inner cavity of the matching groove 7.

The radial side wall of the upper cover 1 is provided with a waterproof card sleeve card slot 19, and the inner cavity of the waterproof card sleeve card slot 19 is fixedly inserted with an external signal connection column 12 on the side wall away from the opening. The inner cavity is slidingly inserted with a waterproof card sleeve 2, and the inner cavity of the waterproof card sleeve card slot 19 and the waterproof card sleeve 2 are both T-shaped structures. The side wall of the waterproof card sleeve 2 away from the opening is inserted with an external signal The connecting column 12 is matched with a mating socket 18 to be inserted, and a conductive block 17 is inserted into the inner cavity of the matching socket 18 away from the external signal connecting column 12.

Two PVC plastic springs 13 distributed up and down are arranged between the outer wall of the waterproof ferrule 2 on the side away from the opening and the inner cavity of the waterproof ferrule groove 19 on the side wall away from the opening.

The upper and lower side walls of the waterproof ferrule 2 are provided with rectangular holes, and the inner cavity of the two rectangular holes is close to the opening of the waterproof ferrule 2 and the side wall is inclined 45 degrees to the inner cavity of the waterproof ferrule 2 with a PVC plastic plate 16. The side wall of the two PVC plastic plates 16 away from the inner cavity of the waterproof ferrule 2 is provided with a semicircular limit ball 15. The upper and lower sides of the inner cavity of the waterproof ferrule groove 19 are provided with a semicircular limiter. The semicircular limit groove 14 matched with the position ball 15.

In this embodiment, before use, the relevant circuits of the recorder and the integrated circuit board are fixedly installed in the inner cavity of the hollow threaded sleeve 6 on the upper end surface of the base 8, and then the upper cover 1 is closed on the upper end surface of the base 8. And through the internal thread and the outer wall of the hollow threaded sleeve 6, at the same time, the annular plastic sealing ring 3 is located between the upper cover 1 and the base 8, and the annular plastic sealing ring 3 and the upper cover 1 in the annular limit groove 10 The cavity is matched, and the annular limit plate 9 is matched and inserted into the inner cavity of the matching groove 7; in addition, the first annular hollow sealing gasket 4 is fixedly attached to the outer wall of the annular plastic sealing ring 3, and the outer wall of the first annular hollow sealing gasket 4 The second annular hollow sealing washer 5 is fixedly attached below, so that the first annular hollow sealing washer 4 is located in the inner cavity of the annular limiting groove 10, and the second annular hollow sealing washer 5 is located in the inner cavity of the matching groove 7, so that it rotates When the cover 1 and the hollow threaded sleeve 6 of the base 8 are used, the annular limiting plate 9 is used to press the second annular hollow sealing washer 5, so that the second annular hollow sealing washer 5 is squeezed and tightly attached to the annular limiting plate 9 The outer wall uses the bottom end surface of the annular plastic sealing ring 3 to squeeze the first annular hollow sealing gasket 4, so that the first annular hollow sealing gasket 4 is squeezed and closely fits the outer wall of the annular plastic sealing ring 3, which improves the connection and sealing performance, and During this process, the first annular hollow sealing washer 4 and the second annular hollow sealing washer 5 are connected through the annular gap 11, so when rotating and sealing, the space between the first annular hollow sealing washer 4 and the second annular hollow sealing washer 5 The volumes can make up for each other. On the one hand, it can avoid crushing the first annular hollow sealing gasket 4 and the second annular hollow sealing gasket 5 due to excessive internal pressure. On the other hand, it can also be compensated by volume exchange to improve the sealing effect and waterproof Effect; by providing a waterproof ferrule 2 in the radial shell of the upper cover 1 that is relatively isolated from the inner cavity of the upper cover 1, in a natural state, the waterproof ferrule 2 is affected by the elastic force of the upper and lower springs 13, and the waterproof ferrule 2 is far away from the waterproof The external signal connection post 12 in the inner cavity of the card sleeve slot 19 disconnects the connection path with the external circuit to further improve the waterproof effect. When an external signal cable plug is needed, the external signal cable plug can be directly inserted into the waterproof card sleeve 2Inner cavity, at the same time, the external signal cable plug can lift the upper and lower two PVC plastic plates 16 and push the semicircular limit ball 15 into the semicircular limit slot 14, restricting the waterproof card sleeve 2 by the PVC plastic spring 13 The inner cavity of the waterproof card sleeve card slot 19 is ejected, which affects the external signal cable plug to fit the conductive block 17 and connect with the external signal connection post 12.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "vertical", "upper", "lower", "horizontal" and the like are based on the directions or positional relationships shown in the drawings, and are only for It is convenient to describe and simplify the description of the present invention, rather than indicating or implying that the pointed device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, "first", "second", "third", and "fourth" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance.

In the description of the present invention, it should also be noted that the terms "set", "installation", "connected", and "connected" should be interpreted broadly unless otherwise clearly defined and restricted. For example, it can be a fixed connection or a fixed connection. It can be a detachable connection, or an integral connection, a mechanical connection, an electrical connection, a direct connection, or a connection through an intermediate medium, or a communication between two components. For those of ordinary skill in the art, the specific meaning of the above-mentioned terms in the present invention can be understood according to specific circumstances.

Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, and substitutions can be made to these embodiments without departing from the principle and spirit of the present invention. And variations, the scope of the present invention is defined by the appended claims and their equivalents.

Claims

A water-proof housing of a wave recorder, comprising an upper cover (1), a base (8) and an annular plastic sealing ring (3), characterized in that: the upper end surface of the base (8) has a hollow threaded sleeve ( 6) The upper cover (1) is closed on the upper end surface of the base (8), and is rotated and inserted into the outer wall of the hollow threaded sleeve (6) through internal threads, and the bottom end surface edge side of the upper cover (1) A ring-shaped limiting plate (9) extends downwards from the wall body. The bottom edge of the upper cover (1) is provided with an annular limiting groove (10) located inside the ring-shaped limiting plate (9). The ring-shaped plastic The sealing ring (3) is located between the upper cover (1) and the base (8), and the annular plastic sealing ring (3) matches the inner cavity of the annular limit groove (10) of the upper cover (1), and the base ( 8) A matching groove (7) is recessed downwardly in the side wall of the top surface edge of the top surface, and the annular limit plate (9) is mated and inserted into the inner cavity of the matching groove (7).
The waterproof housing of a wave recorder according to claim 1, wherein the outer wall of the upper cover (1) and the base (8) have the same large diameter.
The waterproof housing of a wave recorder according to claim 1, wherein the vertical height of the annular limit plate (9) is equal to the vertical height of the inner cavity of the matching groove (7), and the annular plastic The vertical height of the sealing ring (3) is equal to the vertical height of the inner cavity of the annular limit groove (10).
The waterproof housing of a wave recorder according to claim 1, wherein the outer wall of the annular plastic sealing ring (3) is fixedly attached with a first annular hollow sealing gasket (4), and the first annular hollow sealing The inner cavity cross section of the gasket (4) is a rectangular structure, and a second annular hollow sealing gasket (5) is fixedly attached under the outer wall of the first annular hollow sealing gasket (4), and the second annular hollow sealing gasket (5) The inner cavity section of the second annular hollow sealing gasket (5) has a circular structure, and the inner cavity side wall of the second annular hollow sealing gasket (5) is provided with an annular gap (11) communicating with the inner cavity of the first annular hollow sealing gasket (4).
The waterproof housing of a wave recorder according to claim 4, wherein the first annular hollow sealing gasket (4) is located in the inner cavity of the annular limit groove (10), and the second annular hollow sealing gasket (5) Located in the inner cavity of the matching groove (7).
The waterproof housing of a wave recorder according to claim 1, characterized in that: the radial sidewall of the upper cover (1) is provided with a waterproof ferrule slot (19), and the waterproof ferrule snap slot ( The side wall of the inner cavity of 19) far away from the opening is fixedly inserted with an external signal connection column (12), and the inner cavity of the waterproof card sleeve card slot (19) is slidably inserted with a waterproof card sleeve (2), and is waterproof The inner cavity of the card sleeve card slot (19) and the waterproof card sleeve (2) are both T-shaped, and the side wall of the inner cavity of the waterproof card sleeve (2) away from the opening is plugged with an external signal connection column (12) The matching socket (18) is matched and inserted, and a conductive block (17) is inserted into the side wall of the inner cavity of the matching socket (18) far away from the external signal connection column (12).
The waterproof housing of a wave recorder according to claim 1, characterized in that: the outer wall of the waterproof sleeve (2) away from the opening and the inner cavity of the waterproof sleeve (19) away from the opening Two PVC plastic springs (13) distributed up and down are arranged between the walls.
The waterproof housing of a wave recorder according to claim 1, characterized in that: the upper and lower side walls of the waterproof sleeve (2) are provided with rectangular holes, and the inner cavities of the two rectangular holes are close to the waterproof card. The side wall of one side of the opening of the sleeve (2) is inclined 45 degrees to the inner cavity of the waterproof ferrule (2), and a PVC plastic plate (16) is provided, and two of the PVC plastic plates (16) are away from the inner cavity of the waterproof ferrule (2) A semi-circular limit ball (15) is provided on one side wall of the waterproof ferrule, and the upper and lower sides of the inner cavity of the waterproof card sleeve (19) are provided with a semicircle matching the semi-circular limit ball (15) Shaped limit slot (14).
The waterproof housing of a wave recorder according to claim 1, wherein the specific usage method is:

(S1). Before use, fix the relevant circuits of the recorder and the integrated circuit board in the inner cavity of the hollow threaded sleeve (6) on the upper end surface of the base (8), and then cover the upper cover (1) on the base (8) The upper end surface is rotated and inserted into the outer wall of the hollow threaded sleeve (6) through the internal thread. At the same time, the annular plastic sealing ring (3) is located between the upper cover (1) and the base (8), and the annular plastic The sealing ring (3) is matched with the inner cavity of the annular limit groove (10) of the upper cover (1), and the annular limit plate (9) is matched and inserted into the inner cavity of the matching groove (7);

(S2). In addition, the first annular hollow sealing gasket (4) is fixed and pasted on the outer wall of the annular plastic sealing ring (3), and the second annular hollow sealing is fixed and pasted below the outer wall of the first annular hollow sealing gasket (4) The gasket (5) makes the first annular hollow sealing washer (4) located in the inner cavity of the annular limit groove (10), and the second annular hollow sealing washer (5) is located in the inner cavity of the matching groove (7), so that it rotates When the upper cover (1) and the hollow threaded sleeve (6) of the base (8) are used, the second annular hollow sealing washer (5) is pressed by the annular limit plate (9), and the bottom of the annular plastic sealing ring (3) is used. The end face squeezes the first annular hollow sealing washer (4), and in this process, the first annular hollow sealing washer (4) and the second annular hollow sealing washer (5) are connected through the annular gap (11), so the rotating seal When the first annular hollow sealing gasket (4) and the second annular hollow sealing gasket (5) can make up for each other, on the one hand, it can avoid crushing the first annular hollow sealing gasket (4) and The second annular hollow sealing gasket (5), on the other hand, can also be compensated by volume exchange to improve the sealing effect and the waterproof effect;

(S3). The radial housing of the upper cover (1) is provided with a waterproof ferrule (2) that is relatively isolated from the inner cavity of the upper cover (1). In a natural state, the waterproof ferrule (2) is subjected to two upper and lower springs ( 13) The impact of elasticity, the waterproof ferrule (2) is far away from the external signal connection post (12) in the inner cavity of the waterproof ferrule slot (19), and the connection path with the external circuit is disconnected to further improve the waterproof effect. An external signal is required When using a cable plug, you can directly insert the external signal cable plug into the inner cavity of the waterproof ferrule (2). At the same time, the external signal cable plug can lift the upper and lower two PVC plastic plates (16) to limit the semicircle. The positioning ball (15) is pushed into the semi-circular limit slot (14) to restrict the waterproof ferrule (2) from being ejected by the spring (13) from the inner cavity of the waterproof ferrule slot (19), which affects the connection of the external signal cable plug to conduction Block (17) and connect with the external signal connection post (12).