JP3114607B2 - Communication equipment structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication device such as a key telephone, and more particularly to a structure for adding an additional key unit according to the purpose of addition.

[0002]

2. Description of the Related Art As is well known, in a communication device such as a key telephone, for example, the number of extensions, the number of office lines,
In some cases, special functions such as a group call, a conference call, and a secret function are required to be added.

In the case of such a request, conventionally, an additional key unit 1A is added to the key telephone 2A (communication device main body) by a structure as shown in FIGS. That is, a key unit mounting window 4A that can be shielded by a blind cover (not shown) is provided in the telephone case 3A of the key telephone 2A.
The additional key unit 1A incorporating the required functional components is fixed to the key unit mounting window 4A by fixing means such as fixing claws 5a.

In other words, a plurality of fixing claws 5a which can be respectively engaged with hooking grooves 6A formed in the telephone case 3A of the key telephone 2A are integrally formed with the unit case 5A of the additional key unit 1A. On the surface of a plurality of additional keys 7 assigned to each function
A is arranged. As shown in FIG. 4, a unit-side printed circuit board 8A on which an additional functional component (not shown) is mounted is provided inside the unit case 5A, and a switching device located on the surface of the unit-side printed circuit board 8A is provided. The flexible cup 9a of the rubber 9A faces each extension key 7A.

A unit connector 11A is fixed to the lower surface of the additional key unit 1A for electrical connection with the main body printed circuit board 10A inside the key telephone 2A, and the additional key unit for the key telephone 2A. At the time of assembling 1A, the unit side connector 11A is connected to the main body side connector 12A located on the surface of the main body side printed board 10A.

[0006]

However, according to the structure of the communication device as described above, when the additional key unit 1A is assembled to the key telephone 2A, the fixed claw 5 is required.
at the same time as the mechanical connection of the unit case 5A by a.
The unit-side connector 11A must be electrically connected to the body-side connector 12A, and the assembling process is troublesome. In addition to the body-side printed board 10A of the key telephone 2A, the unit-side printed board 8A, the body-side connector 12A
A. The unit-side connector 11A must be prepared, and the switching rubber and the unit-side connector 11A are assembled to the additional key unit 1A. Therefore, the overall thickness of the additional key unit 1A is increased, and as a result, the size of the key telephone 2A is reduced. However, there is a problem that it is difficult to reduce the thickness. SUMMARY OF THE INVENTION An object of the present invention is to provide a simple structure of an additional key unit in view of the above-mentioned problems of the conventional communication device structure, and to easily attach the additional key unit to the communication device main body. An object of the present invention is to provide a communication device structure capable of reducing the overall thickness of a unit.

[0007]

According to the present invention, a key unit mounting window is formed in a case of a communication device main body, and an additional key unit having an additional key is assembled to the key unit mounting window. In the communication device structure, an additional function electronic component is assembled on a main body side printed circuit board inside the communication device main body, and a flexible board corresponding to the additional key is provided on a surface of the main body side printed circuit board corresponding to the key unit mounting window. A switching rubber having a cup is arranged, and the additional key unit has a slip-out prevention plate for preventing the expansion key from slipping out of a unit case. The present invention proposes a communication device structure in which an escape hole capable of accommodating a flexible cup is formed.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to FIGS. The illustrated embodiment is an example in which the present invention is applied to a key telephone 2, in which dial keys 13 and function keys 14 are arranged on the surface of a telephone case 3 of the key telephone 2 (communication device main body). A key unit mounting window 4 to which an additional key unit 1 described later can be mounted is formed in a part of the key unit mounting window. That is, as shown in FIG. 2, the functional element of the key telephone and the additional function electronic parts required for the additional key unit 1 are assembled on the main body side printed board 10 facing the key unit mounting window 4. The switching rubber 9 is laminated on the surface of the side printed circuit board 10.

On the side surface of the unit case 5 of the additional key unit 1, a fixing claw 5a capable of engaging with the hook groove 6 inside the key unit mounting window 4 is integrally formed. On the other hand, a plurality of additional keys 7 assigned to each function are arranged so as to be able to appear and disappear. That is, each of these additional keys 7 is prevented from coming out of the unit case 5 by the flange 7a,
Since the corresponding flexible cup 9a formed integrally with the switching rubber 9 faces the flange 7a, when one of the additional keys 7 is pressed while the additional key unit 1 is assembled to the key telephone 2, the corresponding flexible cup is pressed. The cup 9a is elastically deformed, and the additional function circuit assembled to the main body side printed circuit board 10 is activated.

The bottom surface of the unit case 5 is covered with a pull-out preventing plate 15 that can contact the flange 7a of each of the additional keys 7, and the pull-out preventing plate 15 prevents the additional key 7 from coming out of the unit case 5. An escape hole 16 is formed in the pull-out prevention plate 15 at a position corresponding to each of the flexible cups 9a so as to accommodate the flexible cups 9a.

Since the structure of the communication device according to the illustrated embodiment is as described above, when the additional key unit 1 is dropped into the key unit mounting window 4 of the telephone case 3, the additional key unit 1 Key telephone 2 by 5a
Is mechanically fixed to the telephone case 3. In this fixed state, the flexible cups 9a of the switching rubber 9 pass through the escape holes 16 of the pull-out preventing plate 15 and naturally correspond to the flanges 7a of the additional key 7, so that no electrical connection is made and no common connection is made. , Just by pressing each additional key 7,
The extension function can be used.

Further, since the additional key unit 1 and the pull-out prevention plate 15 are simply assembled to the additional key unit 1 in the communication device structure, the overall thickness of the additional key unit 1 can be sufficiently reduced, so that a small There is an advantage that the present invention can be applied to a communication device.

[0013]

As is apparent from the above description, according to the present invention, the electrical connector used between the unit side printed circuit board used for the additional key unit and the communication device main body can be eliminated, and the total thickness of the additional key unit can be eliminated. Since the size can be reduced, the extension process can be simplified, and a small communication device can be obtained.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a key telephone according to the present invention.

FIG. 2 is an enlarged sectional view of a main part of the key telephone.

FIG. 3 is an exploded perspective view of a conventional key telephone.

FIG. 4 is an enlarged sectional view of a main part of the button telephone.

[Description of Signs] 1 Additional key unit 2 Button telephone (communication device main body) 3 Telephone case 4 Key unit mounting window 5 Unit case 5a Fixing claw 7 Additional key 9 Switching rubber 9a Flexible cup 10 Main body side printed circuit board 15 Pull-out prevention plate 16 Escape Hole

Claims (1)

(57) [Claims] 1. A communication device structure in which a key unit mounting window is formed in a case of a communication device main body, and an additional key unit having an additional key is assembled in the key unit mounting window.
The extension function electronic parts are assembled on the main body side printed circuit board inside the communication device main body, and the extension key is mounted on the surface of the main body side printed circuit board corresponding to the key unit mounting window .
Switching rubber with flexible cup adapted
The additional key unit is located in front of the unit case.
Equipped with an escape prevention plate to prevent the extension key from slipping out.
The escape prevention plate is in contact with the extension key.
Forming an escape hole capable of accommodating the flexible cup.
Characteristic communication equipment structure.