JP2007124081A - Door phone device - Google Patents

Abstract

To provide a door phone device capable of protecting a circuit board from rainwater entering from a sound passage hole of a cover and dew condensation water generated in the device.
A structure in which a circuit board on which a speaker and an electronic component are mounted is accommodated between a body and a cover so that a cover having a sound passage hole is disposed in front of the speaker. In the door phone device 20, a rainwater intrusion prevention plate 5 is interposed between the circuit board 2 and the speaker 3 to prevent the rainwater that has entered the speaker 3 from entering the circuit board 2. ing.
[Selection] Figure 1

Description

  The present invention relates to a door phone device installed at a gate pillar or a front door of a residence.

Door phone devices used in intercom systems are installed at outdoor gates and front doors. However, because they are outdoors, they are easily exposed to rain, so a structure that does not allow moisture such as rainwater to easily enter the device is required. .
For this reason, the device body and cover are firmly joined, or a double structure is provided by a decorative cover case. However, since there are sound passage holes for speakers and sound collection holes for microphones, the ingress of water is completely eliminated. It cannot be prevented.

  In addition, since the temperature change is large outdoors, condensation may occur in the apparatus. For this reason, even if rain water can be prevented from entering, moisture may adhere to the circuit board and electrical components, which may cause problems such as poor communication and poor calling. In particular, when the apparatus is set a little on an inclined wall surface, the dew condensation on the inner wall may hang down on the circuit board or the like.

  In the following patent document, a door phone device is proposed in which a metal to which condensed moisture is attached before condensation occurs on a circuit board is provided at various locations in the device.

  FIG. 5 shows a sectional view of the door phone device proposed in this document. In the figure, 100 is a door phone device, 101 is a body, 102 is a cover, 103 is a speaker, 104 is a microphone, 105 is a sound passage hole, 106 is a sound collection hole, 107 is a circuit board, 108 is a circuit board mounting base, 109a, 109b is a metal piece which is a dew condensation adhering member.

As shown in the figure, when the circuit board 107 is arranged in the central space in the apparatus 100 and the metal pieces 109a and 109b are provided on the inner walls of the body 101 and the cover 102, the outside air temperature is lowered and the apparatus 100 is cooled. In this case, the metal pieces 109a and 109b are cooled faster than the circuit board 107, and condensation occurs before condensation occurs on the circuit board 107, so that the circuit board 107 is less likely to cause condensation.
Japanese Utility Model Publication No. 7-20741

  However, in the door phone device structure of the above document, the circuit board 107 is completely defenseless in the space in the device 100. For example, when the device 100 is installed on an inclined wall surface, water droplets attached to the metal pieces 109a and 109b There is a risk of dripping and wetting the surface of the circuit board 107. Further, it is impossible to prevent rainwater or the like entering from the sound hole 105 of the speaker 103 from adhering to the circuit board 107.

  The present invention has been proposed in view of such circumstances, and its purpose is to provide a door phone device that can protect a circuit board from rainwater entering from a sound passage hole of a cover and condensed water generated in the device. It is to provide.

  Note that the object of the present invention is not limited to the structure in which the circuit board and the speaker are separated as shown in FIG. 5, and the door phone device is formed thin by fitting the rear part of the speaker into a hole provided in the circuit board. It is also applicable to.

  In order to achieve the above object, a door phone device according to claim 1 is configured such that a circuit board on which a speaker and an electronic component are mounted is provided between the body and the cover so that a cover having a sound passage hole is arranged in front of the speaker. A door phone device with a structure accommodated between the circuit board and the speaker, and a rainwater intrusion prevention plate is interposed between the circuit board and the speaker to prevent the rainwater that has entered the speaker from entering the circuit board. ing.

  According to a second aspect of the present invention, the rainwater intrusion prevention plate has a lower end extending downward from the circuit board.

  According to a third aspect of the present invention, the rainwater intrusion prevention plate is provided with an insertion hole having a projecting peripheral wall that makes contact with the rear portion of the speaker protruding.

  According to a fourth aspect of the present invention, the rainwater intrusion prevention plate is provided with a rainwater guide plate projecting from a position directly below the peripheral wall to the lower side of the door phone device and provided with a water outlet at the lower end.

  In the door phone device according to claim 1, since a rainwater intrusion prevention plate is interposed between the circuit board and the speaker, rainwater that has entered the speaker through the sound passage hole of the cover is prevented from entering the circuit board. it can.

  In the door phone device according to claim 2, since the lower end of the rainwater intrusion prevention plate extends downward from the circuit board, even if moisture adhering to the rainwater intrusion prevention board drops, it hardly enters the circuit board. Absent.

  The door phone device according to claim 3 has a structure in which a rainwater intrusion prevention plate has an insertion hole in which a peripheral wall projects, and the peripheral wall contacts with the rear portion of the speaker protruding. Yes. In other words, the rear part of the speaker has a structure protruding to the circuit board side from the rainwater intrusion prevention plate, but since the peripheral wall protrudes from the insertion hole, even if moisture goes around the back side of the speaker, Intrusion into the circuit board can be prevented.

  In the door phone device according to claim 4, since the rainwater intrusion prevention plate extends from directly below the peripheral wall to the lower side of the door phone device, and a rainwater guide plate having a water drainage opening at the lower end projects, raindrops are produced on the speaker. Even if it adheres, there is a rainwater guide plate directly under it, so that rainwater is received there, guided further downward in the door phone device, and discharged from the water outlet provided at the lower end of the doorphone device. Inundation can be prevented.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  FIG. 1 is an exploded perspective view of the door phone device of the present invention. FIG. 2 is a perspective view showing the internal structure of the door phone device of the present invention. 3A to 3C show a front view, a side view, and a plan view, respectively, in a state in which the decorative cover case is attached.

This door phone device 20 is connected to an interphone main unit (not shown) installed indoors by a signal line (not shown), and installed at an outdoor entrance or the like so that a person who visits the residence can talk to an indoor resident. It is what is done.

  Hereinafter, the internal structure of the door phone device 20 will be described with reference to FIGS. 1 and 2. In FIG. 1, the illustration of the decorative cover case 7 covering the front surface of the apparatus is omitted, and the illustration of the speaker 3 and the cover 4 is further omitted in FIG.

The door phone device 20 accommodates the speaker 3, the push button switch 6, and the circuit board 2 on which the electronic component 2 a is mounted in a space between the body 1 and the cover 4, and includes the cover 4 having the sound passage hole 4 a. The cover 4 is coupled to the body 1 so as to be disposed in front of the speaker 3. Further, a decorative cover case 7 provided with a sound passage hole 7a, a sound collection hole 7b, and a switch window 7c is attached so as to cover the cover 4 (see FIG. 3).
In addition, 4b in the figure is a sound collection hole for calls provided in the cover 4, and 4c is a switch hole. Reference numeral 9 denotes a spring for projecting and supporting the push button switch 6 from the switch window 7c of the decorative cover case 7 (see FIG. 3).

  In the present invention, as shown in the figure, a rainwater intrusion prevention plate 5 is further interposed between the circuit board 2 and the speaker 3. The rainwater intrusion prevention plate 5 is made of at least a material such as a resin having water repellency, and rainwater that enters the speaker 3 from the sound hole 4 a of the cover 4 to the circuit board 2 by the prevention plate 5. Prevents intrusion.

  In the door phone device 20 shown in the present embodiment, the rear portion 3a (see FIG. 4 described later) protruding rearward of the speaker 3 is fitted into the mounting hole 2b provided in the circuit board 2, thereby reducing the thickness of the device. The rainwater intrusion prevention plate 5 is also provided with an insertion hole 5a for allowing the rear portion 3a of the speaker 3 to be inserted, and a peripheral wall 5b is projected forward from the insertion hole 5a. The peripheral wall 5b has a structure in which a peripheral edge 3d (see FIG. 4) or a peripheral ring (not shown) of the speaker 3 is in contact with the peripheral wall 5b.

  The door phone device 20 is assembled as follows. That is, the speaker 3 and the push button switch 6 are installed at predetermined positions with respect to the rainwater intrusion prevention plate 5 in advance, and in this state, the prevention plate 5 is integrated with the cover 4 by screws 8, and the speaker 3 protruding rearward. The rear part 3a and the mounting hole 2b of the circuit board 2 are fitted together, and the cover 4 and the body 1 are fixed with screws.

According to the above apparatus configuration, since the rainwater intrusion prevention plate 5 is interposed between the speaker 3 and the circuit board 2, it is possible to prevent rainwater from entering the circuit board 2 side. And the mounted electronic component 2a can be prevented from being corroded by water.
Even if the insertion hole 5a is formed in the rainwater intrusion prevention plate 5 for thinning, the rainwater that has entered the back side of the speaker 3 is blocked by the peripheral wall 5b, so that the rainwater is connected to the circuit through the insertion hole 5a. Intrusion into the substrate 2 can be prevented.

Further, the rainwater intrusion prevention plate 5 is provided with a rainwater guide plate 5c projecting from the position directly below the peripheral wall 5b to the lower side of the door phone device 20 and having a water drain port 5d at the lower end thereof.
Thereby, the rainwater dripped from the speaker 3 is guided downward by the rainwater guide plate 5c to the door phone device 20, and falls out of the device through the water outlet 5d provided at the lower end. Therefore, even if rainwater enters the speaker 3, there is almost no possibility of entering the circuit board 2.

  Further, the rainwater intrusion prevention plate 5 has a rib wall 5e projecting forward at the periphery thereof except for the lower end. The rib wall 5e prevents rainwater that has entered from the sound hole 4a from entering the circuit board 2 side from both sides of the rainwater intrusion prevention plate 5.

In the present embodiment, the thin doorphone device 20 in which the rear portion 3a of the speaker 3 is attached to the circuit board 2 is shown. However, the doorphone device of the present invention has the speaker 103 and the circuit board as shown in FIG. The present invention can also be applied to a structure in which 107 is separated.
In that case, needless to say, the rainwater intrusion prevention plate does not require the insertion hole for the speaker rear portion 3a and the peripheral wall thereof.

FIG. 4 is a partial longitudinal sectional view of the door phone device 20. With reference to this figure, the rainwater intrusion prevention structure by the rainwater intrusion prevention plate 5 will be described in detail.
This figure mainly shows the positional relationship between the cover 4, the speaker 3, the rainwater intrusion prevention plate 5, and the circuit board 2, so that the electronic components mounted on the decorative cover case 7, the body 1, and the circuit board 2. 2a and other detailed components on the rainwater intrusion prevention plate 5 are not shown.

The rear portion 3 a of the speaker 3 is inserted into the insertion hole 5 a of the rainwater intrusion prevention plate 5 and is fitted into the mounting hole 2 b of the circuit board 2, while the cone portion 3 b of the speaker 3 is a sound passage hole provided in the cover 4. 4a is arranged so that the front peripheral edge 3c of the cone portion 3b is in contact with the inner wall of the cover 4, and the rear peripheral edge 3d of the speaker 3 is formed in the insertion hole 5a of the rainwater intrusion prevention plate 5. It is in contact with and supported by the peripheral wall 5b.
Further, when the speaker 3 is inserted and fitted into the rainwater intrusion prevention plate 5 and the circuit board 2 as shown in the figure, the lower end 5f of the rainwater intrusion prevention plate 5 extends downward from the circuit board 2. Become.

  In the door phone device 20 having the structure as described above, rainwater passes through the sound passage holes 7a and 4a of the decorative cover case 7 (see FIG. 3) and the cover 4, and enters the device. Further, the cover 4 and the speaker 3 The rainwater enters the space B between the cover 4 and the rainwater intrusion prevention plate 5 because the rainwater intrusion prevention plate 5 is interposed, so that the rainwater enters the circuit board 2 side. Intrusion is prevented. In addition, since rainwater that circulates to the back side of the speaker 3 is blocked by the peripheral wall 5b of the rainwater intrusion prevention plate 5, the rainwater hardly enters the circuit board 2 through the insertion hole 5a.

In particular, when the door phone device 20 is attached to an inclined wall surface, it becomes easy for rainwater to enter from the sound holes 4a. There is no.
Furthermore, since the lower end of the rainwater intrusion prevention plate 5 extends downward from the circuit board 2, even when an inclined wall surface is attached, the water flowing down from the rainwater intrusion prevention plate 5 does not enter the circuit board 2 side.
Further, since the door phone device 20 is installed outdoors, dew condensation occurs on the inner wall of the cover 4 due to a temperature difference. Condensed water droplets dripping due to the inclination are also on the back side of the speaker 3 by the rainwater intrusion prevention plate 5 and its peripheral wall 5b. Intrusion is prevented.

It is the disassembled perspective view which showed an example of the door phone apparatus of this invention. It is the perspective view which showed the internal structure of the door phone apparatus of this invention. (A)-(c) is the front view, side view, and top view of a door phone apparatus of the state which respectively attached the decorative cover case. It is a fragmentary longitudinal cross-sectional view of the door phone device of the present invention. It is a longitudinal cross-sectional view of the conventional door phone apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 20 Door phone apparatus 1 Body 2 Circuit board 2a Electronic component 2b Mounting hole 3 Speaker 3a Speaker rear part 3b Cone part 3c Front peripheral part 3d Rear peripheral part 4 Cover 4a Sound through hole 5 Rainwater intrusion prevention plate 5a Insertion hole 5b Perimeter wall 5c Rainwater guide 5d water outlet

Claims (4)

A door phone device having a structure in which a cover having a sound passage hole is arranged in front of a speaker and the speaker and a circuit board on which an electronic component is mounted are accommodated between the body and the cover,
A door phone device having a structure in which a rainwater intrusion prevention plate is interposed between the circuit board and the speaker to prevent rainwater that has entered the speaker from entering the circuit board. In claim 1,
The rainwater intrusion prevention plate has a lower end extending downward from the circuit board. In claim 1 or 2,
The rainwater intrusion prevention plate is a door phone device in which an insertion hole is provided in which a peripheral wall that protrudes in contact with the rear portion of the speaker is protruded. In claim 3,
The rainwater intrusion prevention plate is a doorphone device in which a rainwater guide plate is provided projecting from a position directly below the peripheral wall to the lower side of the doorphone device, and having a water outlet at the lower end.

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