JP2538037Y2 - Rain-proof structure of electronic equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rainproof structure for an electronic device, and more particularly to a rainproof structure for an electronic device in which raindrops do not accumulate in a microphone hole provided on a bottom portion of the electronic device.

[0002]

2. Description of the Related Art Intercom slave units are generally installed outdoors. FIG.
As shown in (a) and (b), the child device 40 is a speaker S,
Microphone M, button P (FIG. 2A) and electronic component 10
Is housed in the lower housing 30 and fitted to the upper housing 20 (FIG. 2B). Further, the lower housing 30 of the slave unit 40 is provided with a back connection part (terminal part) T.

A frame F for fixing such a slave unit 40 is installed on a fixed portion W such as a wall surface, a gate post, etc. (FIG. 2).
(B)) A wiring cable L from an indoor master unit (not shown) is provided in the fixing portion W. The wiring cable L from the indoor master unit is connected to a rear connection portion T provided in the lower housing 30. The visitor can use the button P, the speaker S, and the microphone M on the front upper casing 20 of the intercom slave unit (FIG. 2A) to talk with the indoor master unit via the cable L.

The intercom slave unit 40 installed outdoors is exposed to rain, and the raindrops transmitted on the surface of the upper housing 20 are subjected to a microphone hole 50 provided on the bottom surface of the upper housing 20.
In addition, since a water film is generated due to the surface tension of raindrops, the sound from the microphone M has a small volume or a low-pitched sound, making it difficult to hear. Further, if the microphone hole 50 is enlarged so as not to generate a water film, there is a possibility that the microphone body is mischief from the enlarged microphone hole.

[0005]

[Object] The present invention has been made to solve such a conventional problem, and is generated in a microphone hole provided on a bottom portion by raindrops transmitted on the surface of an upper housing or raindrops blown from a gap. An object of the present invention is to provide a rain-proof structure of an electronic device capable of removing a water film.

[0006]

According to the present invention, there is provided a rain-proof structure for an electronic device in which an electronic component is mounted and an upper housing for protecting a front surface of the electronic component. In the electronic device, a microphone hole is provided on the bottom surface of the upper housing, the thickness of the microphone hole is formed to be thin on the end face, and the thickness is increased from the end face toward the outer peripheral direction, and further, the end face of the microphone hole is provided. And a rib extending in the outer peripheral direction to increase the thickness.

[0007]

[Function] A microphone hole is provided on the bottom of the upper housing of the intercom slave unit, and the thickness of the end face of the microphone hole is made thin, so that the amount of water in the water film accumulated due to the surface tension of raindrops is reduced. The microphone hole is formed so as to increase in thickness from the end surface of the microphone hole toward the outer periphery, and the rib that extends from the end surface of the microphone hole to the outer periphery and increases in thickness is provided. Raindrops move along. Since the rainwater can be pulled from the water film in the microphone hole by the movement of the raindrop, a water film does not occur in the microphone hole. This makes it possible to provide a sound that is easy to hear.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. The intercom handset is generally installed outdoors. As shown in FIGS. 1A and 1B, the slave unit 4 stores a speaker B, a microphone M, a button P (FIG. 1A), and a board B on which an electronic component 1 is mounted in a lower housing 3. And is fitted to the upper housing 2. Further, the lower housing 3 of the slave unit 4 is provided with a back connection part (terminal part) T.

A frame F for fixing such a slave unit 4
Is installed on a fixed part W such as a wall surface or a gate post (FIG. 1).
(B)) A wiring cable L from an indoor master unit (not shown) is provided in the fixing portion W. The distribution cable L from the indoor master unit is connected to a rear connection portion T provided in the lower housing 3. The visitor can use the button P, the speaker S, and the microphone M on the front upper housing 2 of the intercom slave unit 4 (FIG. 1A) to talk with the indoor master unit via the cable L.

FIG. 1 shows the rain-proof structure of the handset 4 of the intercom.
As shown in (a) and (b), a microphone hole (elongated hole) 5 is provided on the bottom surface of the upper housing 2, and the thickness of the end face of the microphone hole 5 is formed, for example, to 0.3 mm. The microphone hole 5 has a tapered surface a whose thickness increases from the end face of the microphone hole 5 toward the outer periphery. Further, two ribs 6 which extend from the end face of the microphone hole 5 to the frame F and have a large thickness are provided. Between the pair of ribs 6, a tapered surface b extending from the end face of the microphone hole 5 located on the frame F side to the frame F and increasing in thickness, and an end face of the microphone hole 5 located inside the rib 6. And a fan-shaped tapered surface c extending along the rib 6 from the frame F.

Since the intercom slave unit 4 is installed outdoors, the raindrops transmitted on the surface of the upper housing 2 during rainfall enter the microphone hole 5 provided on the bottom surface of the lower housing 3 due to the surface tension of the raindrops and form a water film. However, since the thickness of the microphone hole 5 is formed to be as thin as, for example, 0.3 mm, the amount of water in the water film can be suppressed. Then, at an early stage, the water film collapses due to its own weight and does not generate a water film due to the action of the ribs 6 and the tapered surfaces a, b, and c. It is possible to move to a fixed portion W such as a wall surface or a gate post. As a result, the water film can be reliably removed, so that the sound from the microphone M can be easily heard.

Although the rainproof structure of the electronic device according to the present invention has been described with reference to an embodiment in which the microphone hole 5 is provided on the bottom surface of the upper housing 2, the present invention can be used not only for the microphone hole 5 but also for a reset switch hole. can do. Further, the electronic device of the present invention is not limited to the intercom slave unit, and can be applied to all electronic devices placed in an environment exposed to rain or the like.

[0013]

[Effects of the Invention] As is apparent from the above embodiments, the rainproof structure of the electronic device according to the present invention has electronic components mounted thereon.
In an electronic device in which a lower housing having a connection portion on the rear surface and an upper housing for protecting the front surface are fitted, a microphone hole is provided on the bottom portion of the upper housing, and the thickness of the end surface of the microphone hole is formed thin. The amount of water in the water film that has accumulated due to the surface tension of raindrops decreases,
Further, the rib is formed so as to extend from the end face of the microphone hole to the frame so as to be thicker, and the rib is formed so as to extend from the end face of the microphone hole in the outer peripheral direction to be thicker. Raindrops move along the slope. Since the water from the water film generated in the microphone hole can be pulled by the movement of the raindrop, the water film generated in the microphone hole can be removed.

[Brief description of the drawings]

FIGS. 1A and 1B are views for explaining an embodiment of a rainproof structure of an electronic device according to the present invention, wherein FIG. 1A is a perspective view showing the entire structure, FIG. 1B is a side sectional view, FIG. () Is an AA cross-sectional view of (c).

2A and 2B are diagrams illustrating an example of a rainproof structure of a conventional electronic device, where FIG. 2A is a perspective view showing the entire structure, FIG. 2B is a side sectional view, FIG. 2C is a bottom view, and FIG. FIG. 3 is a sectional view taken along line AA of FIG.

[Explanation of symbols]

 2 Upper casing 3 Lower casing 4 Electronic device 5 Microphone hole (long hole) 6 Rib a, b, c Tapered surface M Microphone

Claims (1)

(57) [Scope of request for utility model registration] An electronic device in which a lower housing on which an electronic component is mounted and an upper housing for protecting the front surface of the electronic component are fitted, wherein a microphone hole is provided in a bottom portion of the upper housing. The thickness of the hole was thin at the end face, the thickness was increased from the end face toward the outer peripheral direction, and a rib extending from the end face of the microphone hole toward the outer peripheral direction to increase the thickness was provided. A rainproof structure for an electronic device, characterized in that: