Waterproof cap

Abstract

To provide a waterproof cap that prevents water from entering an object.SOLUTION: A waterproof cap 1 includes a main body 21, a wire passage 23, and an annular groove 25. The main body 21 is generally cylindrical, with a large diameter in the axial middle portion forming a step 27, a tapered portion 29 that narrows in diameter toward one end, and an insertion portion 30 that extends from the middle portion toward the other end and is inserted into a protective tube 17 that covers a wires 15. By attaching the waterproof cap 1 to a wire port 11, when a lid 7 is closed, the lid 7 does not interfere with the tapered portion 29 of the main body 21, such that the lid 7 does not deform and no gap is formed between the lid 7 and a housing main body 9, preventing water from entering an object (housing 5).SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a waterproof cap for preventing water from entering an object. [Background technology]

[0002] Conventionally, there has been known an object (housing) that includes a box-shaped lid that is rectangular in front view and has an opening on the rear side, and a box-shaped main body that is also rectangular in front view and has an opening on the front side, and that forms a substantially rectangular parallelepiped when the lid closes the opening of the main body. Such a housing contains electrical components and is provided with a wiring port for passing wiring from the outside (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-098766 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in an object (housing) that has a wiring port, a protective tube is attached to the wiring port to protect the wiring from the outside.When the lid is closed, the lid interferes with the protective tube, creating a gap between the main body and the lid, which can allow water to enter the housing through the gap.There is also the problem that water can enter the housing by running along the wiring inside the protective tube.

[0005] The present invention has been made in view of the above points, and has an object to provide a waterproof cap that prevents water from entering an object. [Means for solving the problem]

[0006] In order to solve the above problem, the invention of claim 1 is a waterproof cap for preventing water from entering an object, which is attached to a cylindrical wiring port provided in the object for passing wiring from the outside into the inside of the object, and which comprises an approximately cylindrical main body, an annular groove formed concentrically at one end of the main body into which the wiring port is inserted, and a wiring passage that penetrates the main body in the axial direction, wherein the main body has a large diameter in the middle axial direction forming a step portion, a tapered portion that narrows in diameter toward one end, and an insertion portion at the other end that is inserted into a protective tube that covers the wiring. The invention according to claim 2 is characterized in that in the waterproof cap of claim 1, there are a plurality of the wiring passages. [Effects of the Invention]

[0007] The waterproof cap according to the present invention can prevent water from entering the object. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a schematic perspective view of a train emergency stop switch with a waterproof cap attached according to one embodiment of the present invention. FIG. [Figure 2] FIG. 2 is a schematic side view of the train emergency stop switch shown in FIG. 1. [Figure 3] 2 is a schematic partial cross-sectional view of the waterproof cap and the wiring port shown in FIG. 1. [Figure 4] 2A to 2C are diagrams of the waterproof cap shown in FIG. 1, where (a) is a front view, (b) is a plan view, and (c) is a bottom view. [Figure 5] FIG. 5 is a cross-sectional view taken along the line AA shown in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0009] The configuration of a waterproof cap according to one embodiment of the present invention will be described in detail with reference to Figures 1 to 5. In this embodiment, a waterproof cap attached to a train emergency stop switch will be described as an example. First, as shown in Figures 1 to 3, a train emergency stop switch 3 to which a waterproof cap 1 is attached will be described. The train emergency stop switch 3 is used to bring a moving train to an emergency stop, and includes a housing 5 (object) and various components 19 for realizing the functions of the train emergency stop switch 3, such as a switch mechanism and alarm means housed inside the housing 5. The housing 5 includes a lid 7 and a housing main body 9. The lid 7 has a rectangular box shape when viewed from the front, with its rear side open. The housing main body 9 also has a rectangular box shape when viewed from the front, with the lid 7 closing the opening of the housing main body 9, so that the housing 5 is a substantially rectangular parallelepiped. A cylindrical wiring port 11 protruding from an upper outer wall of the housing 5, specifically from the upper outer wall of the housing main body 9, is integrally formed in order to pass wiring 15 from the outside into the housing 5. The lid portion 7 and the storage body portion 9 are attached to the storage body portion 9 via an opening / closing mechanism 13 so that the lid portion 7 can be opened, closed, and detached from the storage body portion 9 .

[0010] As shown in Figures 1 to 5, the waterproof cap 1 prevents water from entering the housing 5 and includes a main body 21, a wire passage 23, and an annular groove 25. The main body 21 is generally cylindrical, with a large diameter at the axially intermediate portion forming a step 27 and a tapered portion 29 that tapers toward one end. The main body 21 also has an insertion portion 30 extending from the intermediate portion toward the other end and inserted into the protective tube 17 that covers the wires 15. The tapered portion 29 is angled so as not to interfere with the lid 7 when the lid 7 is closed. Two wire passages 23 are formed to axially penetrate the main body 21. The annular groove 25 is formed concentrically at one end of the main body 21 and extends from the one end to approximately the middle. Two annular protrusions 31 are formed on the outer periphery of the annular groove 25 to prevent the wires from slipping out of the wire port 11 of the lid 7.

[0011] According to the waterproof cap 1 having the above-described configuration, the following effects can be obtained. The main body 21 of the waterproof cap 1 has a tapered portion 29 that narrows toward one end, so that when the lid portion 7 is closed, the lid portion 7 does not interfere with the tapered portion 29, so the lid portion 7 does not deform and no gap is formed between the lid portion 7 and the housing main body 9, preventing water from entering the housing 5.

[0012] The main body 21 of the waterproof cap 1 is provided with two wiring passages 23 formed to penetrate in the axial direction, so that when the wiring 15 is passed through the wiring passages 23, the gap formed between them can be made small, making it difficult for water to enter.

[0013] The waterproof cap 1 can be easily attached to a housing having an existing wiring port, eliminating the need for reinforcement to prevent water intrusion, thereby reducing costs.

[0014] Furthermore, two wiring passages 23 are formed in main body 21, but a plurality of wiring passages, such as three or four, may be formed.

[0015] In the waterproof cap 1 according to the embodiment, the object to which water should be prevented from entering is the casing 5, but it may be a case, a housing, a partition wall, or the like. [Explanation of symbols]

[0016] 1...waterproof cap, 5...casing (object), 11...wiring port, 15...wiring, 17...protective tube, 21...main body, 23...wiring passage, 25...annular groove, 27...step portion, 29...tapered portion, 30...insertion portion

Claims

1. A waterproof cap for preventing water from entering an object, the waterproof cap being attached to a cylindrical wiring port provided in the object for passing a wiring from the outside into the object, A substantially cylindrical main body portion; an annular groove formed concentrically at one end of the main body and into which the wiring port is inserted; a wiring passage that passes through the main body in the axial direction, A waterproof cap characterized in that the main body portion has a large diameter step in the axial middle portion, a tapered portion that narrows in diameter toward one end, and an insertion portion on the other end that is inserted into a protective tube that covers the wiring.

2. 2. The waterproof cap according to claim 1, wherein the number of said wiring passages is plural.

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