JPH0530248Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a breathing mechanism that performs a breathing action between the inside and outside of a sealed lamp. This relates to a waterproof structure that prevents water from entering the environment.

[Conventional technology]

Hereinafter, the waterproof structure of the breathing mechanism of a conventional lamp will be explained with reference to FIG.

In the figure, 1 is a lamp, and this lamp 1 includes a lamp body 2 such as a housing and a reflector, a lens 3 that is adhered to a front opening recess 20 of the lamp body 2 with an adhesive 21, and the lamp body 2 and the lens 3. A bulb 40 is disposed inside a lamp interior (lamp chamber) 4 that is hermetically defined by a lamp.

Reference numeral 5 denotes a medium-projecting cylindrical body integrally protruding from the lamp body 2, and a wall of the lamp body 2 between the inside of the cylindrical body 5 and the inside of the lamp chamber 4 communicates the inside of the lamp chamber 4 with the outside. A ventilation hole 50 is provided, and a stepped portion 51 is provided on the outer peripheral surface of the tip of the cylinder 5. 52 is the cylindrical body 5 of the lamp body 2
This is a waterproof wall that protrudes from a lower part.

Reference numeral 6 denotes a grommet as a cap body, and this grommet 6 is made of a rubber tube member and is bent into a U-shape. A step 60 is provided on the inner peripheral surface of one end of the grommet 6. One end of the grommet 6 thus formed is externally fitted onto the tip of the cylinder 5, and one end surface of the grommet 6 is placed on the step 51 of the cylinder 5, and the tip surface of the cylinder 5 is placed on the step 60 of the grommet 6. The other end of the grommet 6 faces downward and faces the waterproof wall 52.

Thus, in the breathing mechanism of the lamp mentioned above,
The inside of the lamp chamber 4 and the outside communicate with each other via a vent hole 50 of the cylinder body 5 and a grommet 6. As a result, a breathing effect can be achieved between the inside of the lamp chamber 4 and the outside. Furthermore, since the grommet 6 is bent into a U-shape and is installed with one end fitted onto the cylinder 5 and the other end facing down, water enters the opening at the lower end of the grommet 6 and the water passes through the grommet 6. Even if you try to enter the light chamber 4, the grommet 6 is bent and has a long path.
The water falls halfway through the grommet 6 due to its own weight.
Water is discharged to the outside from the opening at the bottom of the tank, which prevents water from entering back into the tank. Moreover, since the opening at the lower end of the grommet 6 faces the waterproof wall 52, it is possible to further prevent rainwater from entering the opening at the lower end of the grommet 6.

[The problem that the idea aims to solve]

However, the waterproof structure of the breathing mechanism of the above-mentioned conventional lamp has a U-shaped grommet 6 with one end fitted onto the cylindrical body 5 and the other end facing downward, which has a breathing action and a waterproofing action. Therefore, there are problems such as the vertical dimension is large and the installation space is large. Moreover, when the waterproof wall 52 facing the lower end opening of the grommet 6 is integrally provided on the lamp body 2, the vertical dimension becomes even larger.
The above-mentioned problems become noticeable.

Therefore, an application was first filed for a waterproof structure for the breathing mechanism of a lamp that requires a small installation space. Examples of this include those described in the microfilms of Utility Model Publication No. 62-28010 and Utility Model Application No. 57-77020 (Utility Model Application No. 1987-179703).

In the former case, the lamp body 1 is provided with a cylindrical body 7 that communicates the inside and outside of the lamp body 1, and a peripheral wall 9 that surrounds the cylindrical body 7 with a space 19 between the lamp body 1 and the cylindrical body 1 is attached to the lamp body 1.
, forming notches 8 and 10 in the cylindrical body 7 and the circumferential wall 9 at mutually shifted positions, and closing the outer end of the cylindrical body 7 with an end wall or a cap body 15; The outer end of the peripheral wall 9 is connected to the cap body 1.
5. As a result, a path is taken from the internal space of the cylindrical body 7 to the notch 8 in the cylindrical body 7 to the space 19 between the cylindrical body 7 and the circumferential wall 9 to the notch 10 in the circumferential wall 9, and the lamp body 1 is In addition to performing internal and external breathing functions, the labyrinth-like path described above can prevent water from entering from the outside.

Further, in the latter case, a ventilation hole 5 is provided in the lamp body 1, a bottomed cylindrical portion 6 that covers the ventilation hole 5 protrudes from the lamp body 1, an opening 7 is provided on the lower surface of the bottomed cylindrical portion 6, and the ventilation hole 5 is provided in the lamp body 1. A spiral shielding wall 8 is provided around the bottom cylinder part 6. As a result, the path from the ventilation hole 5 → inside the bottomed cylindrical part 6 → to the notch 7 of the bottomed cylindrical part 6 achieves a breathing action inside and outside the lamp body 1, and also serves as a spiral shield between the bottomed cylindrical part 6 and the above-mentioned bottomed cylindrical part 6. The wall 8 prevents water from entering from the outside.

The former mainly consists of the cylindrical body 7, the circumferential wall 9, and the cap 15, and the latter mainly consists of the bottomed cylindrical portion 6 and the spiral shielding wall 8. In other words, both have a substantially double-tube structure. For this reason, both have problems such as requiring a rather large installation space.

An object of the present invention is to provide a waterproof structure for a breathing mechanism of a lamp that requires a smaller installation space.

[Means to solve the problem]

In the present invention, a cylindrical body is horizontally protruded from the lamp body, a shielding plate is horizontally provided on the inner peripheral surface of the cylindrical body, and the cylindrical body is divided into an upper communication passage and a lower communication passage. The lamp body is provided with a ventilation hole that communicates between the inside of the lamp and the upper communication passage, the cylindrical body is provided with an opening that communicates with the outside and the lower communication passage, and the cylindrical body and the lamp body are provided with a waterproof wall. , a cap body is provided almost vertically to surround the periphery of the cylindrical body, and a cap body is attached to the open end of the cylindrical body, so that the cap body covers the open end of the cylindrical body, and also covers the opening of the cylindrical body. The present invention is characterized in that a space is formed at an end side to communicate the upper communicating path and the lower communicating path.

[Effect]

With the above configuration, the present invention takes a route from the ventilation hole → upper communication passage → space → lower communication passage → opening,
It can perform a breathing function between the inside and outside of the lamp. Furthermore, the maze-like path and waterproof wall described above can prevent water from entering from the outside.

In particular, the present invention includes a single-layer cylinder whose internal space is divided into an upper communication passage and a lower communication passage by means of a shielding plate, and a single cylinder body which is attached to the open end of the cylinder to form an upper communication passage and a lower communication passage. A cap body that forms a space that communicates with the
Since it constitutes a maze-like route,
In other words, since it has a single-tube structure, 2
It is possible to achieve advantages such as requiring a smaller installation space compared to the case of a multi-tube structure.

〔Example〕

Hereinafter, an embodiment of the waterproof structure of the breathing mechanism of a lamp according to the present invention will be described with reference to FIGS. 1 to 4.

In the figure, reference numeral 7 denotes a hollow cylindrical body integrally projecting from the lamp body 2, and a stepped portion 70 is provided on the outer peripheral surface of the tip of this cylindrical body 7. A ventilation hole 7 that communicates with the inside of the lamp chamber 4 is provided in the upper part of the wall of the lamp body 2 inside this cylinder 7.
1 will be provided. An opening 72 communicating with the outside is provided on the lower surface of the base of the cylinder 7 to the lamp body 2. A shielding plate portion 73 is provided horizontally and integrally at approximately the center of the inner circumferential surface of the cylinder 7 and the lamp body 2 so as to vertically divide the upper ventilation hole 71 and the lower opening 72 into two. Labyrinth-like upper and lower communication passages 74 and 75 are formed that communicate the ventilation hole 71 and the opening 72. These upper and lower communication passages 74 and 75 are connected to the cylinder body 7.
and a shielding plate portion 73, and the vertical distance therebetween gradually decreases from the open end 76 of the cylindrical body 7 toward the lamp body 2. In particular, the upper surface of the shielding plate portion 73 in the upper communication passage 74 slopes downward from the lamp body 2 side toward the open end 76 of the cylinder body 7. A waterproof wall 77 is provided substantially vertically and integrally on the back surface of the lamp body 2 and the lower part of the outer peripheral surface of the cylindrical body 7 so as to surround the periphery of the opening 72.

Reference numeral 8 denotes a cap body, and this cap body 8 has an inner diameter that is approximately equal to or slightly smaller than the outer diameter of the tip portion than the stepped portion 70 of the cylindrical body 7, and a depth that extends from the open end 76 surface of the cylindrical body 7 to the stepped portion 70. slightly larger than the distance. A stepped portion 80 is provided on the inner peripheral surface of the cap body 8.
The dimension from the open end 81 surface to the stepped portion 80 of the cylinder 7 is
The dimension is approximately equal to the dimension from the opening end 76 surface to the stepped portion 70.

In this way, the cap body 8 is fitted over the tip of the cylinder body 7, and the open end 81 surface of the cap body 8 is connected to the step 70 of the cylinder body 7, and the open end 76 surface of the cylinder body 7 is connected to the step part of the cap body 8. 80 respectively. Then, since the depth of the cap body 8 is greater than the distance from the open end 76 surface of the cylinder body 7 to the stepped portion 70, a space 83 is created between the open end surface 76 of the cylinder body 7 and the inner surface of the lid 82 of the cap body 8. is formed. As a result, the above-described ventilation hole 71 communicating with the inside of the lamp chamber 4 and the opening 72 communicating with the outside are communicated with each other through the labyrinth-shaped upper communication passage 74, space 83, and lower communication passage 75.

The waterproof structure of the breathing mechanism of the lamp of the present invention in this embodiment has the above-mentioned configuration, so the inside of the lamp chamber 4 and the outside are defined by the ventilation hole 71, the upper communication passage 74, the space 83, the lower communication passage 75, Since it communicates through the opening 72, it can perform a breathing action. Furthermore, since the waterproof wall 77 is provided around the opening 72, rainwater can be prevented from entering the cylinder 7 through the opening 72. Moreover, there is a ventilation hole 71 that communicates with the inside of the lamp chamber 4, and an opening 7 that communicates with the outside.
2 are in communication with each other through a maze-shaped upper communicating passage 74, a space 83, and a lower communicating passage 75, so rainwater enters from the opening 72 at the bottom of the cylinder 7, and the rainwater flows through the lower communicating passage 75 and the lower communicating passage 75. Even if an attempt is made to enter the lamp chamber 4 through the space 83 and the upper communication passage 74 and through the ventilation hole 71 at the top of the cylinder 7, the rainwater will fall due to its own weight during the long maze-like journey and fall into the cylinder. 7 is discharged to the outside through an opening 72 at the bottom of the lamp 7, thereby preventing rainwater from entering the lamp chamber 4.

In particular, in this embodiment, an opening 72 communicating with the outside is provided at the bottom of the cylinder 7, a ventilation hole 71 communicating with the inside of the lamp chamber 4 is provided at the top of the cylinder 7, and the upper communication passage 74 is provided at the top of the cylinder 7. The upper surface of the shielding plate part 73 inside is sloped from top to bottom from the lamp body 2 to the open end 76 of the cylindrical body 7, that is, has a downward slope, completely preventing rainwater from entering into the lamp chamber 4. be able to.

Further, in this embodiment, since the waterproof wall 77 is provided almost vertically and integrally on the lamp body 2 and the cylindrical body 7 so as to surround the periphery of the opening 72, water does not leak from the horizontal direction. This can prevent the cylindrical body 7 from entering the opening 72.
It can also be reinforced.

In this way, the cylindrical body 7 protruding from the lamp body 2
Since it can have a breathing effect and a waterproofing effect, the vertical dimension is the sum of the outer diameter of the cylinder body 7 and the height of the waterproof wall 77, and the U-shaped grommet and the lower end of the grommet can be Compared to the waterproof structure in the breathing mechanism of conventional lamps that uses a waterproof wall provided below, it is smaller. Therefore, only a small installation space is required.

In particular, the present invention includes a single cylinder body 7 in which the internal space is divided into an upper communication passage 74 and a lower communication passage 75 by a shielding plate part 73, and an upper communication passage that is attached to the open end 76 of the cylinder body 7. Since the cap body 8 forming the space 83 that communicates the passage 74 and the lower communication passage 75 constitutes a maze-like path, that is, it has a single-tube structure, so it has a double-tube structure. It is possible to achieve advantages such as requiring a smaller installation space compared to the previous one.

In addition, in the above-mentioned embodiment, the upper communication path 7
4, the space 83 and the lower communication path 75 form a labyrinth-like communication path, but the invention is not limited to this. For example, the inner surface of the lid 82 of the cap body 8 is brought into contact with the open end 76 of the cylinder body 7 to eliminate the space 83, while the shielding plate portion 73 of the cylinder body 7 is shortened from the open end 76 toward the lamp body 2 side to create a maze. A communication path may be formed.

[Effect of idea]

As is clear from the above, the waterproof structure of the breathing mechanism of the lamp of the present invention consists of a single-layered cylinder whose internal space is divided into an upper communication passage and a lower communication passage by a shielding plate part, and an opening of the cylinder. Since the cap body is attached to the end and forms a space that communicates the upper communication passage and the lower communication passage, it constitutes a labyrinth-like path, that is, it has a single-tube structure. It is possible to achieve advantages such as requiring a smaller installation space compared to the case of a multi-tube structure.

Furthermore, in the present invention, the waterproof wall is integrally provided on the lamp body and the cylindrical body almost vertically so as to surround the periphery of the opening, so that water is prevented from entering the opening from the horizontal direction. It is possible to prevent this and also to reinforce the cylindrical body.

[Brief explanation of the drawing]

1 to 4 show an embodiment of the breathing mechanism of a lamp according to the present invention, in which FIG. 1 is a sectional view of the main part, FIG. 2 is a view taken in the direction of the arrow in FIG. 1, and FIG. 1 is a cross-sectional view taken along the line --, and FIG. 4 is a perspective view with the cap body removed. FIG. 5 is a sectional view of a conventional lamp showing a waterproof structure in a breathing mechanism of the lamp. 2...Lamp body, 4...Light chamber (inside the light),
7... Cylindrical body, 71... Ventilation hole, 72... Opening,
74...Upper communication passage, 75...Lower communication passage, 77...
Waterproof wall, 8...cap body, 83...space.

Claims (1)

[Scope of utility model registration request] A cylindrical body protruding horizontally from the lamp body, a shielding plate portion provided horizontally on the inner circumferential surface of the cylindrical body and dividing the cylindrical body into an upper communication passage and a lower communication passage, and a shielding plate portion provided on the lamp body. a ventilation hole that communicates between the inside of the lamp and the upper communication passage; an opening provided in the cylindrical body that communicates with the outside and the lower communication passage; and an opening in the cylindrical body and the lamp body that A waterproof wall provided almost vertically so as to surround the periphery; attached to the open end of the cylindrical body to cover the open end of the cylindrical body; A waterproof structure for a breathing mechanism of a lamp, comprising: a cap body forming a space communicating with a lower communication passage.