JP2001177616A - Water drain structure for interphone slave set case - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water drain structure for an interphone slave set capable of securing the received speech volume of voice of a visitor, etc., by preventing water drops from being accumulated in the microphone hole of an interphone slave set. SOLUTION: The interphone slave set case is provided with a camera 16 and a microphone 11, the camera is covered with a camera cover 12, and the microphone hole 13 connected spatially to the microphone is bored at the camera cover. In the case, a drain groove 15 for making rain water entering the case through the microphone hole flow downward is provided at the lower part of the microphone hole, and a rib 14 for preventing drops from being accumulated in the microphone hole due to surface tension on rain water from the side wall 19 of the microphone hole.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drainage structure for an intercom slave unit case, and more particularly to a water drainage structure for an interphone slave unit case in which waterproofing around a microphone is considered.

[0002]

2. Description of the Related Art Conventionally, an intercom with a camera has a case 20 as shown in FIGS. 2 (a) and 2 (b).
, A camera 25, a microphone 21, a speaker 27, and a push button 28 are arranged on the front side of the camera.
Microphone hole 2 that is covered by microphone 2 and spatially connected to microphone 21
3 is bored in the camera cover 22.

[0003] Since the microphone hole 23 is open to the outside, rain drops enter the microphone hole 23 provided in the camera cover 22 when it rains. As shown in FIG. 2D, when moisture such as rain enters the microphone hole 23, water droplets 3 accumulate in the microphone hole 23 due to the surface tension X2 received from the side wall 29 of the microphone hole 23. In order to prevent such a phenomenon, a water drain groove 24 for flowing rainwater downward is provided below the microphone hole 23, and even if water drops accumulate, the water drops 3 are guided by the own weight of the water drops 3.

[0004]

However, in an intercom entrance unit provided with a camera having a pan / tilt function, the camera 25 has a large image pickup range, and as shown in FIG. 22 has a shape like a convex lens, and the side wall 29 of the microphone hole 23 provided therein is high.

If the side wall 29 is high, the surface tension X2 of the water droplet 3 accumulated in the microphone hole 23 increases, and the water droplet 3 does not flow downward from the drain groove 24. For this reason, the microphone 21
The microphone hole 23 on the front of the device is covered with water, and there is a problem that the volume of a received voice such as a voice uttered by the visitor is extremely reduced.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a drainage structure for an intercom slave unit case which can prevent water drops from accumulating in a microphone hole of the intercom slave unit case and can secure a reception volume of a voice or the like uttered by a visitor. .

[0007]

In order to achieve the above object, a drainage structure for an intercom slave unit case according to the present invention includes a camera and a microphone, the camera is covered by a camera cover, and the microphone is spatially mounted. In the intercom sub unit case where the connecting microphone hole is drilled in the camera cover, a drain groove is provided below the microphone hole to allow rainwater that enters from the microphone hole to flow downward, and the surface tension acts on the rainwater from the side wall of the microphone hole and the microphone A rib that prevents water drops from accumulating in the hole protrudes from the microphone hole.

[0008] According to the drainage structure of the intercom slave unit case, since the rib is protruded below the microphone hole so that water does not accumulate due to surface tension in the microphone hole or the like, the microphone hole is formed. Before closing, the surface tension is unbalanced and the water is guided downward, so that the microphone hole is not blocked, and therefore the receiving volume is not reduced.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the drainage structure of an intercom slave unit case of the present invention will be described below in detail with reference to the drawings.

As shown in FIGS. 1 (a) and 1 (c), the drainage structure of the intercom slave unit case according to the present invention is shown in FIG.
0, a camera 16, a microphone 11, a speaker 17,
The camera 16 includes a push button 18 and the camera cover 12
Microphone hole 13 that is covered by and is spatially connected to microphone 11
Is an intercom slave unit case formed in the camera cover 12, which is provided with a drain groove 15 for flowing rainwater from the microphone hole 13 downward below the microphone hole 13.

Further, as shown in FIGS. 1B and 1D, the surface tension X1 acts on the water droplet 3 formed by the collection of rainwater from the side wall 19 of the microphone hole 13 so that the water droplet 3 will accumulate in the microphone hole 13. In order to prevent the water droplets 3 from becoming large, the ribs 14 are positioned below the microphone holes 13 to partially remove the water drain grooves 1.
5 are provided continuously.

The rib 14 extends from the entrance of the microphone hole 13 and the upper part of the drain groove 15, and is provided to project vertically from the horizontal plane of the microphone hole 13 and the surface of the drain groove 15. The rib 14 is formed as a separate member from the microphone hole 13, and the microphone hole 13 and the drain groove 15 are formed by bonding or other means.
It is also suitable to be fixed to.

Next, the operation of the drainage structure of the intercom slave unit case according to the present invention will be described.

Since the microphone hole 13 is open to the outside, rain drops enter the microphone hole 13 provided in the camera cover 12 when it rains. As shown in FIG. 1D, when moisture such as rain enters the microphone hole 13, water droplets 3 start to accumulate in the microphone hole 13 due to the surface tension X1 received from the side wall 19 of the microphone hole 13.

However, the vertically projecting ribs 14 are continuous from the bottom of the microphone hole 13 to a part of the drain groove 15 so as to work from below to break the balance of the surface tension X1 so as to prevent the water droplet 3 from becoming large. Before the water droplet 3 becomes large due to the surface tension received from the rib 14 and closes the microphone hole 13, the water drain groove provided under the microphone hole 23 to allow rainwater to flow downward by the weight of the water droplet 3. It goes down 14 and falls. Therefore, the receiving volume of the microphone 11 does not decrease due to the microphone hole 13 being closed by the rainwater.

[0016]

As is apparent from the above description, according to the drainage structure of the intercom slave unit case of the present invention, a camera and a microphone are provided, and the camera is covered by the camera cover.
In the case of an intercom slave unit in which a microphone hole spatially connected to the microphone is drilled in the camera cover, a drainage groove is provided below the microphone hole to allow rainwater entering from the microphone hole to flow downward, and the rainwater flows from the side wall of the microphone hole to the rainwater. A rib is provided in the microphone hole to prevent water droplets from collecting in the microphone hole due to tension, so that water does not collect in the microphone hole due to surface tension and does not block the microphone hole, thus reducing the volume of the microphone receiving sound. There is no.

[Brief description of the drawings]

FIGS. 1A and 1B are diagrams illustrating a drainage structure of an intercom slave unit case of the present invention, wherein FIG. 1A is a perspective view, FIG. 1B is a diagram illustrating a microphone hole, FIG. 1C is a cross-sectional view, and FIG. Is a sectional view of a main part.

FIG. 2 is a view for explaining a water draining structure of a conventional microphone.
(A) is a perspective view, (b) is a cross-sectional view, and (c) and (d) are main-portion cross-sectional views. FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 ... Microphone 12 ... Camera cover 13 ... Microphone hole 14 ... Rib 15 ... Drainage groove 16 ... Camera 19 ... Microphone hole side wall 3 ... Water drop X1 ... surface tension

Claims (1)

[Claims] A camera (16) and a microphone (11);
The camera is covered with a camera cover (12), and a microphone hole (13) spatially connected to the microphone is provided in the intercom slave unit case. The microphone hole is located below the microphone hole. A drain groove (15) for flowing rainwater downward is provided, and a rib for preventing water drops (3) from accumulating in the microphone hole due to surface tension (X1) acting on the rainwater from the side wall (19) of the microphone hole. (14) The interphone sub unit case drain structure, wherein (14) is protruded from the microphone hole.