JP7558751B2 - Intercom Equipment - Google Patents

Description

The present invention relates to an intercom device with a built-in speaker, such as an intercom master unit.

Conventionally, typical intercom devices such as intercom master units are equipped with speakers for reporting voices. In addition, as for the structure of reporting voices from the speaker, as described in Patent Document 1, for example, many devices have a slit-shaped speaker hole on the front of the main body case of the intercom device, and a speaker is installed behind the speaker hole facing forward, so that voices are reported to the front.

JP 2017-11583 A

In recent years, due to the diversification of intercom device designs, there has been a demand to avoid providing a speaker hole on the front of the main body case. For this reason, it is possible to provide a speaker hole on the periphery of the main body case, such as the side, but if the speaker is installed facing to the side, the problem arises that the thickness of the main body case in the front-to-rear direction becomes very large.

The present invention has been developed in consideration of the above problems, and aims to provide an intercom device that does not require a speaker hole on the front of the main body case and does not increase the thickness of the main body case in the front-to-rear direction.

In order to achieve the above-mentioned object, the present invention provides an intercom device that is installed with the rear surface of a main body case facing toward an installation surface, wherein the rear surface of the main body case is provided with a sound alarm recess that is recessed forward , and the sound alarm recess has a first sound alarm recess and a second sound alarm recess that is recessed further forward than the first sound alarm recess, is adjacent to the circumferential surface of the main body case of the first sound alarm recess, and opens into the circumferential surface of the main body case, and a speaker hole is opened in a location within the first sound alarm recess on the rear surface of the main body case, while a speaker is installed within the main body case in front of the speaker hole in an orientation facing backward.

According to the present invention, a sound report recess recessed forward is provided on the rear surface of the main body case . The sound report recess includes a first sound report recess and a second sound report recess recessed forward from the first sound report recess, adjacent to the circumferential surface of the main body case of the first sound report recess, and opening on the circumferential surface of the main body case. A speaker hole is provided in the first sound report recess on the rear surface of the main body case, and a speaker is installed in front of the speaker hole in the main body case, facing backward. Therefore, since a speaker hole is not provided on the front surface of the main body case as in the conventional intercom device, the intercom device has an excellent design. In addition, since the speaker is installed facing backward, the thickness of the main body case in the front-to-rear direction is the same as in the conventional intercom device. Furthermore, a speaker hole is provided within the sound alarm recess, and the sound alarm recess is open to the peripheral surface of the main body case. Therefore, although the sound output from the speaker is directed toward the rear of the main body case (i.e., toward the installation surface), the sound can be sounded around the intercom device with sufficient volume and sound quality.

2 is an explanatory diagram showing the front side of the intercom master unit. FIG. 2 is an explanatory diagram showing the rear side of the intercom master unit. FIG. FIG. 2 is an explanatory oblique view showing the intercom master unit in a disassembled state from the front. FIG. 2 is an explanatory perspective view showing the intercom master unit in a disassembled state from the rear. FIG. 2 is an explanatory diagram showing an enlarged view of a speaker unit. 3 is a cross-sectional explanatory diagram showing the speaker portion taken along line AA in FIG. 2.

Below, we will explain in detail the intercom master unit, which is one embodiment of the present invention, with reference to the drawings.

Figure 1 is an explanatory diagram showing the front side of the intercom master unit 1. Figure 2 is an explanatory diagram showing the rear side of the intercom master unit 1. Figure 3 is an explanatory perspective view showing the intercom master unit 1 in a disassembled state from the front side. Figure 4 is an explanatory perspective view showing the intercom master unit 1 in a disassembled state from the rear side. Figure 5 is an explanatory diagram showing an enlarged view of the speaker unit 10. Figure 6 is an explanatory cross-sectional view showing the speaker unit 10 along line A-A in Figure 2.

The intercom master unit 1 has a main body case made up of a front case 2 located at the front, a rear case 3 attached to the rear of the front case 2, and a panel member 7 attached to the front of the front case 2. A display unit 4 that displays images captured by an intercom handset (not shown) is provided on the front of the main body case. A microphone unit 6 for communicating with the intercom handset is provided to the right of the display unit 4 on the front of the main body case. A response button 5 that is operated to respond to a call from the intercom handset, and various buttons 9, 9, etc. for setting the unit itself are provided below the display unit 4 on the front of the main body case. A speaker unit 10 for communicating with the intercom handset is provided on the upper left (seen from the front) of the rear of the main body case. Such an intercom master unit 1 is installed on a wall or the like in a room with the rear of the main body case facing the installation surface, and displays an image on the display unit 4 in response to a call from the intercom slave unit, and when the answer button 5 is operated, it becomes possible to communicate with the intercom slave unit. 8 is a transparent plate, which is one of the elements that make up the panel member 7.

Here, the speaker section 10, which is the main part of the present invention, will be described.
The speaker unit 10 comprises a speaker 14 and a sound reporting structure provided in the rear case 3. As the sound reporting structure, a first sound reporting recess 11 recessed forward is provided in the upper left part of the rear surface of the rear case 3, and a plurality of speaker holes 12, 12... are opened in the sound reporting recess 11 in the rear surface of the rear case 3. As the sound reporting structure, a second sound reporting recess 13 recessed further forward than the sound reporting recess 11 is provided above the sound reporting recess 11 in the rear surface of the rear case 3. The sound reporting recess 13 is adjacent to the upper side of the sound reporting recess 11 and is provided over the upper edge of the rear surface of the rear case 3. Although the sound alarm recess 13 is blocked from above by an upper wall 15 that protrudes rearward from the rear surface of the rear case 3, a plurality of sound alarm holes 16, 16... are provided as a sound alarm structure in the upper part of the upper wall 15 above the sound alarm recess 13, and the sound alarm recesses 11, 13 are open on the top surface of the main body case (the sound alarm recess 11 is open via the sound alarm recess 13).

On the other hand, a cylindrical speaker mounting section 17 that protrudes forward is provided on the inner surface of the rear case 3, on the front side of the alarm sound recess 11. The speaker 14 is mounted facing backwards relative to the speaker mounting section 17. In other words, the speaker 14 is mounted in front of the speaker holes 12, 12, etc., facing backwards inside the main case.

According to the intercom master unit 1 having the above-mentioned configuration, the rear surface of the rear case 3 is provided with sound alarm recesses 11, 13 that are recessed forward and open to the periphery of the rear case 3, and speaker holes 12, 12... are provided in the rear surface of the rear case 3 within the sound alarm recess 11, while a speaker 14 is installed in front of the speaker holes 12, 12... and facing backwards within the main case. Therefore, since there is no speaker hole on the front surface of the main case as in the past, the intercom master unit 1 has an excellent design.

In addition, because the speaker 14 is installed facing backward, the thickness of the main body case in the front-to-rear direction does not increase compared to the conventional case in which the speaker 14 is installed facing forward. Furthermore, because speaker holes 12, 12... are provided in the sound alarm recess 11 and the sound alarm recesses 11, 13 are opened through sound alarm holes 16, 16... on the top surface of the rear case 3, the sound output from the speaker 14 is output toward the rear of the main body case (i.e., toward the installation surface), but the sound can be sounded with sufficient volume and quality around the intercom master unit 1.

The intercom device according to the present invention can be modified as necessary, not only in its overall configuration, but also in the configuration of the speaker section, etc., without departing from the spirit of the present invention.

For example, in the above embodiment, the sound report recess is opened on the top surface of the main body case, but there is no problem if the sound report recess is opened on the side or bottom surface of the main body case, and the size and shape of the sound report recess can also be appropriately modified in design.
In addition, in the above embodiment, sound report recesses of different depths are provided, and a speaker hole is opened within the relatively shallow sound report recess. However, instead of providing sound report recesses of different depths in this manner, it is of course also possible to provide a single sound report recess of uniform depth and open a speaker hole within that sound report recess.

Furthermore, in the above embodiment, the upper side of the sound report recess is covered by an upper wall, and a sound report hole is provided in the upper wall so that the sound report recess opens to the peripheral surface of the main body case. However, there is no problem if the sound report recess is left open without providing an upper wall in the first place, and the design of how the sound report recess opens to the peripheral surface of the main body case can be modified as appropriate.
In addition, while the above embodiment describes an intercom master unit, the present invention can also be suitably applied to other intercom devices such as intercom slave units, so long as they are equipped with a speaker unit.

1: Intercom base unit (intercom device), 2: Front case (main body case), 3: Rear case (main body case), 7: Panel member (main body case), 10: Speaker section, 11, 13: Sound alarm recess, 14: Speaker, 16: Sound alarm hole.

Claims (1)

An intercom device that is installed with a rear surface of a main body case facing a mounting surface,
a sound report recess recessed forward is provided on the rear surface of the main body case, the sound report recess having a first sound report recess and a second sound report recess recessed forward further than the first sound report recess, adjacent to the first sound report recess on the circumferential surface of the main body case, and opening into the circumferential surface of the main body case;
A speaker hole is provided in the rear surface of the main body case at a position within the first sound notification recess,
An intercom device, characterized in that a speaker is installed in front of the speaker hole within the main body case and facing backward.

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