JP2021150852A - Intercom device - Google Patents

Intercom device Download PDF

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JP2021150852A
JP2021150852A JP2020049887A JP2020049887A JP2021150852A JP 2021150852 A JP2021150852 A JP 2021150852A JP 2020049887 A JP2020049887 A JP 2020049887A JP 2020049887 A JP2020049887 A JP 2020049887A JP 2021150852 A JP2021150852 A JP 2021150852A
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transparent plate
flat surface
surface portion
cover member
window
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JP7445478B2 (en
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陽二朗 山田
Yojiro Yamada
陽二朗 山田
紘幸 小板
Hiroyuki Koita
紘幸 小板
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Aiphone Co Ltd
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Aiphone Co Ltd
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Abstract

To provide an intercom device capable of accurately preventing interference between a transparent plate and a button without requiring troublesome installation operations of the transparent plate.SOLUTION: In a front case 2, a lower part 2B providing buttons 7, 7.. and an upper part 2A which is adjacent to an upper side of the lower part 2B, and of which a front surface is ridged up to a front side from the lower part 2B are provided. A window 11 is open in the upper part 2A, and a transparent plate 10 covering the window 11 is installed at a state so that the lower side is along a lower edge (that is, a boundary of the upper part 2A and the lower part 2B) of the upper part 2A. Also, the front surface of a cover member 4 assembled so as to cover the lower part 2B, specifically a portion adjacent to the lower side of the transparent plate 10 is projected to the front side from the front surface of an installation portion (that is, an installation concave part 20) of the transparent plate 10 in the upper part 2A.SELECTED DRAWING: Figure 4

Description

本発明は、たとえば居室内に設置される液晶表示装置を備えたインターホン親機等のインターホン機器に関するものである。 The present invention relates to an intercom device such as an intercom master unit provided with a liquid crystal display device installed in a living room, for example.

従来、たとえばインターホン機器の一例であるインターホン親機としては、液晶表示装置を搭載してなるものがある。そして、そのようなインターホン親機では、インターホン親機の本体ケースに液晶表示装置の表示画面を露出させるための窓を開設するとともに、当該窓を透明板（ガラス板や合成樹脂板）で覆っている（たとえば特許文献１）。 Conventionally, for example, as an intercom master unit which is an example of an intercom device, there is one equipped with a liquid crystal display device. Then, in such an intercom master unit, a window for exposing the display screen of the liquid crystal display device is opened in the main body case of the intercom master unit, and the window is covered with a transparent plate (glass plate or synthetic resin plate). (For example, Patent Document 1).

特開２０１７−６０００５号公報Japanese Unexamined Patent Publication No. 2017-60005

インターホン機器においては、外観の向上を目的として、使用者が押し込み操作するボタンを透明板に隣接した位置に設けたいという要望がある。しかしながら、そのような位置にボタンを設けるとなると、透明板とボタンとが干渉しやすいという問題がある。したがって、透明板の設置位置に高い精度が求められることになるが、そのような精度の高い透明板の設置作業が必要になると、透明板の設置に時間や手間がかかって煩わしいという問題が生じる。 In an intercom device, there is a demand for providing a button to be pushed and operated by a user at a position adjacent to a transparent plate for the purpose of improving the appearance. However, if the button is provided at such a position, there is a problem that the transparent plate and the button easily interfere with each other. Therefore, high accuracy is required for the installation position of the transparent plate, but when the installation work of the transparent plate with such high accuracy is required, there arises a problem that the installation of the transparent plate takes time and labor and is troublesome. ..

そこで、本発明は、上記問題に鑑みなされたものであって、煩わしい透明板の設置作業を必要とすることなく、透明板とボタンとの干渉を確実に防止することができるインターホン機器を提供しようとするものである。 Therefore, the present invention has been made in view of the above problems, and will provide an intercom device capable of reliably preventing interference between the transparent plate and the button without requiring troublesome installation work of the transparent plate. Is to be.

上記目的を達成するために、本発明は、前側に配される前ケースと、後側に配される後ケースとを組み合わせてなる本体ケースを有し、本体ケース内に液晶表示装置が設置されているとともに、前ケースの前面に、液晶表示装置を露出させるための窓が開設されたインターホン機器であって、前ケースの前面に、第１の平面部と、第１の平面部に隣接しており、第１の平面部よりも前方へ隆起した第２の平面部とが設けられ、第２の平面部に、窓が設けられ、窓を覆うように透明板が設置されているとともに、透明板の端縁が、第１の平面部と第２の平面部との境界線に沿っている一方、第１の平面部における透明板の端縁に隣接した位置に、押し込み操作可能なボタンが設けられているとともに、ボタンを露出させる露出口を備えたカバー部材が、第１の平面部を覆うように組み付けられており、さらに、カバー部材の表面で、少なくとも透明板の端縁に隣接する箇所が、第２の平面部における透明板の設置箇所の表面よりも前方に突出していることを特徴とする。 In order to achieve the above object, the present invention has a main body case formed by combining a front case arranged on the front side and a rear case arranged on the rear side, and a liquid crystal display device is installed in the main body case. In addition, it is an interphone device in which a window for exposing the liquid crystal display device is provided on the front surface of the front case, and is adjacent to the first flat surface portion and the first flat surface portion on the front surface of the front case. A second flat surface portion that rises forward from the first flat surface portion is provided, a window is provided on the second flat surface portion, and a transparent plate is installed so as to cover the window. A button that can be pushed into a position where the edge of the transparent plate is along the boundary between the first flat surface portion and the second flat surface portion and is adjacent to the edge of the transparent plate on the first flat surface portion. Is provided, and a cover member having an exposure port for exposing the button is assembled so as to cover the first flat surface portion, and further, on the surface of the cover member, at least adjacent to the edge of the transparent plate. It is characterized in that the portion to be used protrudes forward from the surface of the portion where the transparent plate is installed on the second flat surface portion.

本発明によれば、カバー部材の表面で、少なくとも透明板の端縁に隣接する箇所が、第２の平面部における透明板の設置箇所の表面よりも前方に突出しているため、第２の平面部に透明板を設置する際にカバー部材を予め取り付けておけば、カバー部材の上端に透明板の端縁を押し当てつつ設置することで、透明板に隣接してボタンを設けるというデザインを採用しているにも拘わらず、透明板が第１の平面部側に突出してボタンに干渉してしまうという事態を簡易且つ確実に防止することができる。 According to the present invention, on the surface of the cover member, at least a portion adjacent to the edge of the transparent plate protrudes forward from the surface of the portion where the transparent plate is installed in the second flat surface portion, so that the second plane surface is present. If the cover member is attached in advance when installing the transparent plate on the part, the design is adopted in which the button is provided adjacent to the transparent plate by installing while pressing the edge of the transparent plate against the upper end of the cover member. In spite of this, it is possible to easily and surely prevent the situation in which the transparent plate protrudes toward the first flat surface portion and interferes with the button.

インターホン親機の前面側を示した説明図である。It is explanatory drawing which showed the front side of the intercom master unit. 分解状態にあるインターホン親機を前側から示した斜視説明図である。It is a perspective explanatory view which showed the intercom master unit in the disassembled state from the front side. 分解状態にあるインターホン親機を後側から示した斜視説明図である。It is a perspective explanatory view which showed the intercom master unit in the disassembled state from the rear side. 図１中のＡ−Ａ線断面のうち要部を拡大して示した説明図である。It is explanatory drawing which showed the main part enlarged in the cross section of line AA in FIG. 図１中のＢ−Ｂ線断面のうち要部を拡大して示した説明図である。It is explanatory drawing which showed the main part enlarged in the cross section of line BB in FIG.

以下、本発明の一実施形態となるインターホン親機について、図面にもとづき詳細に説明する。 Hereinafter, the intercom master unit according to the embodiment of the present invention will be described in detail with reference to the drawings.

図１は、インターホン親機１の前面側を示した説明図である。図２は、分解状態にあるインターホン親機１を前側から示した斜視説明図である。図３は、分解状態にあるインターホン親機１を後側から示した斜視説明図である。図４は、図１中のＡ−Ａ線断面のうち要部を拡大して示した説明図である。図５は、図１中のＢ−Ｂ線断面のうち要部を拡大して示した説明図である。なお、図２及び図３では、液晶表示装置１２や制御基板等を省略している。 FIG. 1 is an explanatory view showing the front side of the intercom master unit 1. FIG. 2 is a perspective explanatory view showing the intercom master unit 1 in the disassembled state from the front side. FIG. 3 is a perspective explanatory view showing the intercom master unit 1 in the disassembled state from the rear side. FIG. 4 is an enlarged explanatory view showing a main part of the cross section taken along the line AA in FIG. FIG. 5 is an enlarged explanatory view showing a main part of the cross section taken along line BB in FIG. 1. Note that in FIGS. 2 and 3, the liquid crystal display device 12, the control board, and the like are omitted.

インターホン親機１は、前側に配置される前ケース２、及び前ケース２の後側に組み付けられる後ケース３で構成される本体ケースと、前ケース２の前面に組み付けられ、前ケース２の前面下部を覆うカバー部材４とを有しており、本体ケースの前面中央から上部にかけては、インターホン子機（図示せず）で撮像された映像等を表示する表示部としての機能と、インターホン子機からの呼び出しに対する応答時等に操作する操作部としての機能とを兼ね備えたタッチパネル式の表示操作部５が設けられている。また、表示操作部５の上側には、インターホン子機との間で通話するためのマイク部６が設けられている。さらに、表示操作部５の下側には、自身の設定等のための設定ボタンや非常時に操作する非常報知ボタン等、使用者が押し込み操作する各種ボタン７、７・・が設けられているとともに、インターホン子機との間で通話するためのスピーカ部８が設けられている。そして、このようなインターホン親機１は、居室内の壁面等に設置されており、インターホン子機からの呼び出しに応じて表示操作部５に映像を表示するとともに、表示操作部５において所定の応答操作がなされたことをもって、インターホン子機との間での通話を可能な状態とする。 The intercom master unit 1 is assembled on the front surface of the front case 2 and the main body case composed of the front case 2 arranged on the front side and the rear case 3 assembled on the rear side of the front case 2, and the front surface of the front case 2. It has a cover member 4 that covers the lower part, and from the center to the upper part of the front surface of the main body case, it has a function as a display unit for displaying images captured by an intercom slave unit (not shown) and an intercom slave unit. A touch panel type display operation unit 5 that also has a function as an operation unit that is operated when answering a call from is provided. Further, on the upper side of the display operation unit 5, a microphone unit 6 for talking with the intercom slave unit is provided. Further, on the lower side of the display operation unit 5, various buttons 7, 7, ... Are provided by the user, such as a setting button for own setting and an emergency notification button to be operated in an emergency. , The speaker unit 8 for talking with the intercom slave unit is provided. Then, such an intercom master unit 1 is installed on a wall surface or the like in a living room, displays an image on the display operation unit 5 in response to a call from the intercom slave unit, and makes a predetermined response on the display operation unit 5. When the operation is performed, it is possible to make a call with the intercom slave unit.

ここで、本発明の要部となる前ケース２への透明板１０の設置に係る構造について説明する。
前ケース２は、透明板１０が設置される上部２Ａと、該上部２Ａの下方に隣接しており、ボタン７、７・・が設けられているとともにカバー部材４に覆われる下部２Ｂとを有しており、上部２Ａの前面は、下部２Ｂの前面よりも一段前方に隆起している（図４）。該上部２Ａの前面には、左右両側縁及び上縁を除く略全面にわたり後方へ凹ませた設置凹部２０が設けられており、設置凹部２０内に、液晶表示装置１２（図４、図５に示す）を露出させるための窓１１が開設されている。また、設置凹部２０には、透明板１０が設置可能となっており、設置凹部２０に設置された透明板１０によって窓１１は覆われることになる。この透明板１０は、設置凹部２０と略同じ大きさで、左右方向に長い長方形状とされており、設置凹部２０への設置状態において、透明板１０の下辺が、上部２Ａの下縁に沿うようになっている。 Here, the structure related to the installation of the transparent plate 10 in the front case 2, which is the main part of the present invention, will be described.
The front case 2 has an upper portion 2A on which the transparent plate 10 is installed and a lower portion 2B which is adjacent to the lower portion of the upper portion 2A and is provided with buttons 7, 7, ... And is covered with the cover member 4. The front surface of the upper portion 2A is raised one step forward from the front surface of the lower portion 2B (FIG. 4). An installation recess 20 recessed rearward over substantially the entire surface excluding the left and right side edges and the upper edge is provided on the front surface of the upper portion 2A, and the liquid crystal display device 12 (FIGS. 4 and 5) is provided in the installation recess 20. A window 11 for exposing (shown) is provided. Further, a transparent plate 10 can be installed in the installation recess 20, and the window 11 is covered by the transparent plate 10 installed in the installation recess 20. The transparent plate 10 has substantially the same size as the installation recess 20 and has a rectangular shape that is long in the left-right direction. In the installed state in the installation recess 20, the lower side of the transparent plate 10 follows the lower edge of the upper portion 2A. It has become like.

一方、下部２Ｂにおける左右方向で略中央となる位置には、スピーカ格子１３が開設されている。また、下部２Ｂにおける下縁部であって、スピーカ格子１３の左右両外側となる位置、及び下部２Ｂの左右両端となる位置には、カバー部材４を組み付けるための係止孔１４、１４・・が設けられている。さらに、下部２Ｂにおけるスピーカ格子１３の右側には、複数のボタン７、７・・が、下部２Ｂの上端際（上部２Ａとの境界部分）に沿って左右方向に並設されている。 On the other hand, a speaker grid 13 is provided at a position substantially centered in the left-right direction in the lower portion 2B. Further, locking holes 14, 14, ... Is provided. Further, on the right side of the speaker grid 13 in the lower portion 2B, a plurality of buttons 7, 7, ... Are arranged side by side in the left-right direction along the upper end edge of the lower portion 2B (the boundary portion with the upper portion 2A).

また、カバー部材４は、左右長さが前ケース２の左右長さと略同じで、且つ、上下長さが下部２Ｂの上下長さと略同じとされた正面視矩形の合成樹脂製部材である。該カバー部材４の左右両側縁及び下縁は、それぞれ後方へ折り曲げられており、側壁４ａ、４ａ及び下壁４ｂとされている。また、下壁４ｂの左右方向で略中央となる箇所（下部２Ｂへの組み付け時に、スピーカ格子１３の下方となる箇所）は所定の左右幅にわたって切り欠かれており、スピーカ格子１３の後方に配されるスピーカ（図示せず）から発せられた音声をインターホン親機１外へ報音するための報音口１５とされている。さらに、カバー部材４の後面下縁で、報音口１５の左右両外側に隣接する位置、及び左右両端部には、係止孔１４、１４・・に係止可能な複数の係止爪１６、１６・・が後方へ突設されている。加えて、カバー部材４の上縁には、ボタン７の操作部７Ａを露出させるための切り欠き１７、１７・・が設けられている。 Further, the cover member 4 is a synthetic resin member having a rectangular front view whose left-right length is substantially the same as the left-right length of the front case 2 and whose top-bottom length is substantially the same as the top-bottom length of the lower portion 2B. The left and right side edges and the lower edge of the cover member 4 are respectively bent rearward to form the side walls 4a and 4a and the lower wall 4b. Further, a portion of the lower wall 4b that is substantially centered in the left-right direction (a portion below the speaker grid 13 when assembled to the lower portion 2B) is cut out over a predetermined left-right width and is arranged behind the speaker grid 13. The sound source 15 is used to report the sound emitted from the speaker (not shown) to the outside of the intercom master unit 1. Further, on the lower edge of the rear surface of the cover member 4, a plurality of locking claws 16 that can be locked in the locking holes 14, 14 ... , 16 ... are projected backward. In addition, notches 17, 17, ... For exposing the operation portion 7A of the button 7 are provided on the upper edge of the cover member 4.

そして、上記透明板１０の設置について説明すると、まず透明板１０を設置するよりも前に、係止爪１６、１６・・を係止孔１４、１４・・に係止させることによって、カバー部材４を下部２Ｂに組み付ける。すると、カバー部材４の側壁４ａ、４ａ及び下壁４ｂの先端が前ケース２に近接し、カバー部材４の表面と前ケース２の上部２Ａにおける左右両側縁での表面とが略面一となる。すなわち、設置凹部２０の箇所では、カバー部材４の表面が上部２Ａの表面よりも前方へ突出している。また、カバー部材４の上端は、ボタン７、７・・の操作部７Ａ、７Ａ・・の上面よりも上方へ突出している。そこで、カバー部材４の上端面に透明板１０の下辺を押し当てつつ、透明板１０を貼着する等して設置凹部２０に設置すればよい。すると、透明板１０の下辺が上部２Ａの下縁を越えて下部２Ｂ側へ突出することなく、ひいては透明板１０の下辺と下部２Ｂに設けられているボタン７、７・・の操作部７Ａ、７Ａ・・とが干渉することなく、透明板１０を適切な位置に設置することができる。なお、透明板１０の設置に伴い、透明板１０の表面とカバー部材４の表面とは略面一となる。 Then, the installation of the transparent plate 10 will be described. First, before installing the transparent plate 10, the locking claws 16, 16 ... Are locked in the locking holes 14, 14 ..., so that the cover member Assemble 4 to the lower part 2B. Then, the tips of the side walls 4a and 4a and the lower wall 4b of the cover member 4 are close to the front case 2, and the surface of the cover member 4 and the surface of the upper portion 2A of the front case 2 at both left and right edges are substantially flush with each other. .. That is, at the location of the installation recess 20, the surface of the cover member 4 projects forward from the surface of the upper portion 2A. Further, the upper end of the cover member 4 projects upward from the upper surface of the operation portions 7A, 7A ... Of the buttons 7, 7 ... Therefore, the transparent plate 10 may be attached to the installation recess 20 while pressing the lower side of the transparent plate 10 against the upper end surface of the cover member 4. Then, the lower side of the transparent plate 10 does not protrude toward the lower part 2B beyond the lower edge of the upper part 2A, and by extension, the operation unit 7A of the buttons 7, 7, ... Provided on the lower side of the transparent plate 10 and the lower part 2B. The transparent plate 10 can be installed at an appropriate position without interfering with 7A. With the installation of the transparent plate 10, the surface of the transparent plate 10 and the surface of the cover member 4 become substantially flush with each other.

以上のような構成を有するインターホン親機１によれば、前ケース２に、ボタン７、７・・が設けられる下部２Ｂと、下部２Ｂの上方に隣接しており、表面が下部２Ｂよりも前方へ隆起した上部２Ａとを設け、上部２Ａに窓１１を開設するとともに、窓１１を覆う透明板１０を、その下辺が上部２Ａの下縁（すなわち、上部２Ａと下部２Ｂとの境界線）に沿うような格好で設置している。また、下部２Ｂを覆うように組み付けられるカバー部材４の表面、特に透明板１０の下側に隣接する箇所を、上部２Ａにおける透明板１０の設置箇所（すなわち、設置凹部２０）の表面よりも前方へ突出させている。そのため、透明板１０の設置時に予めカバー部材４を取り付けておけば、透明板１０の下辺をカバー部材４の上端面に押し当てつつ設置するだけで、透明板１０を適切な位置に設置することができる。したがって、透明板１０に隣接してボタン７、７・・を設けるというデザインを採用しているにも拘わらず、従来のように煩わしい作業を要することなく、透明板１０が下部２Ｂ側に突出してボタン７、７・・に干渉してしまうという事態を確実に防止することができる。 According to the intercom master unit 1 having the above configuration, the front case 2 is adjacent to the lower portion 2B provided with the buttons 7, 7, ... Above the lower portion 2B, and the surface is in front of the lower portion 2B. A raised upper portion 2A is provided, a window 11 is opened in the upper portion 2A, and a transparent plate 10 covering the window 11 is provided on the lower edge of the upper portion 2A (that is, the boundary line between the upper portion 2A and the lower portion 2B). It is installed in a fashion that fits the line. Further, the surface of the cover member 4 assembled so as to cover the lower portion 2B, particularly the portion adjacent to the lower side of the transparent plate 10, is in front of the surface of the installation portion (that is, the installation recess 20) of the transparent plate 10 in the upper portion 2A. It is protruding to. Therefore, if the cover member 4 is attached in advance when the transparent plate 10 is installed, the transparent plate 10 can be installed at an appropriate position simply by pressing the lower side of the transparent plate 10 against the upper end surface of the cover member 4 and installing the cover member 4. Can be done. Therefore, despite adopting the design of providing the buttons 7, 7, ... Adjacent to the transparent plate 10, the transparent plate 10 protrudes toward the lower portion 2B side without requiring troublesome work as in the conventional case. It is possible to surely prevent the situation where the buttons 7, 7, ... Are interfered with.

なお、本発明に係るインターホン機器は、インターホン機器の全体的な構成は勿論、液晶表示装置の設置に係る構成等についても、本発明の趣旨を逸脱しない範囲で必要に応じて適宜変更することができる。 In the intercom device according to the present invention, not only the overall configuration of the intercom device but also the configuration related to the installation of the liquid crystal display device may be appropriately changed as necessary without departing from the spirit of the present invention. can.

たとえば、上記実施形態では、第１の平面部を下部とし、第２の平面部を上部としているが、第１の平面部が第２の平面部を囲むように配されている等してもよく、前ケースの前面に、どのような第１の平面部及び第２の平面部を設けるかについては適宜設計変更可能である。
また、上記実施形態では、第２の平面部に設置凹部を設け、該設置凹部に透明板を設置するとしているが、そのような設置凹部を設けないとしても何ら問題はない。 For example, in the above embodiment, the first flat surface portion is the lower part and the second flat surface portion is the upper part, but the first flat surface portion may be arranged so as to surround the second flat surface portion. Often, the design can be appropriately changed as to what kind of first flat surface portion and second flat surface portion are provided on the front surface of the front case.
Further, in the above embodiment, the installation recess is provided in the second flat surface portion, and the transparent plate is installed in the installation recess, but there is no problem even if such an installation recess is not provided.

さらに、上記実施形態では、カバー部材に切り欠き状の露出口を設けるとしているが、ボタンの形状に合わせて、丸孔や四角孔状の露出口を設けても何ら問題はない。
加えて、上記実施形態ではインターホン親機について説明しているが、本発明は、液晶表示装置の前方を覆う透明板が設置されているとともに、押し込み操作可能なボタンが設けられていれば、集合玄関機等の他のインターホン機器に対しても好適に採用することができる。 Further, in the above embodiment, the cover member is provided with a notch-shaped exposed port, but there is no problem even if a round hole or a square hole-shaped exposed port is provided according to the shape of the button.
In addition, although the intercom master unit is described in the above embodiment, the present invention is assembled if a transparent plate covering the front of the liquid crystal display device is provided and a button that can be pushed in is provided. It can also be suitably adopted for other intercom devices such as entrance machines.

１・・インターホン親機（インターホン機器）、２・・前ケース（本体ケース）、２Ａ・・上部（第２の平面部）、２Ｂ・・下部（第１の平面部）、３・・後ケース（本体ケース）、７・・ボタン、７Ａ・・操作部、１０・・透明板、１１・・窓、１２・・液晶表示装置、１７・・切り欠き（露出口）、２０・・設置凹部。 1 ... Intercom master unit (intercom device), 2 ... Front case (main body case), 2A ... Upper part (second flat part), 2B ... Lower part (1st flat part), 3 ... Rear case (Main body case), 7 ... Button, 7A ... Operation unit, 10 ... Transparent plate, 11 ... Window, 12 ... Liquid crystal display, 17 ... Notch (exposed port), 20 ... Installation recess.

Claims (1)

前側に配される前ケースと、後側に配される後ケースとを組み合わせてなる本体ケースを有し、前記本体ケース内に液晶表示装置が設置されているとともに、前記前ケースの前面に、前記液晶表示装置を露出させるための窓が開設されたインターホン機器であって、
前記前ケースの前面に、第１の平面部と、前記第１の平面部に隣接しており、前記第１の平面部よりも前方へ隆起した第２の平面部とが設けられ、
前記第２の平面部に、前記窓が設けられ、前記窓を覆うように透明板が設置されているとともに、前記透明板の端縁が、前記第１の平面部と前記第２の平面部との境界線に沿っている一方、
前記第１の平面部における前記透明板の端縁に隣接した位置に、押し込み操作可能なボタンが設けられているとともに、前記ボタンを露出させる露出口を備えたカバー部材が、前記第１の平面部を覆うように組み付けられており、
さらに、前記カバー部材の表面で、少なくとも前記透明板の端縁に隣接する箇所が、前記第２の平面部における前記透明板の設置箇所の表面よりも前方に突出していることを特徴とするインターホン機器。 It has a main body case that is a combination of a front case arranged on the front side and a rear case arranged on the rear side, and a liquid crystal display device is installed in the main body case and on the front surface of the front case. An intercom device having a window for exposing the liquid crystal display device.
A first flat surface portion and a second flat surface portion adjacent to the first flat surface portion and raised forward from the first flat surface portion are provided on the front surface of the front case.
The window is provided on the second flat surface portion, a transparent plate is installed so as to cover the window, and the edge of the transparent plate is the first flat surface portion and the second flat surface portion. While along the border with
A cover member provided with a push-operable button at a position adjacent to the edge of the transparent plate in the first flat surface portion and an exposure port for exposing the button is the first flat surface portion. It is assembled so as to cover the part,
Further, the intercom is characterized in that, on the surface of the cover member, at least a portion adjacent to the edge of the transparent plate projects forward from the surface of the portion where the transparent plate is installed on the second flat surface portion. device.
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