JPH03196756A - Interphone set - Google Patents

Abstract

PURPOSE:To prevent theft or mischief of a slave set main body by providing a mount state sensing switch device sending a fault of mount state of either the slave set main body or a base mounted with the slave set and driving a call tone generating circuit of a master set. CONSTITUTION:When a mount screw 7 mounting a slave set main body 4 to a base 1 is loosened or removed and the slave set main body 4 is floated from the base 1 or separated therefrom, the depression of a moving contact 15 of a mount state sensing switch device 13 by a mount boss 3 is released. Thus, the mount state sensing switch device 13 is closed, a call tone generating circuit 27 is driven and a sound is generated from a speaker 28. Since the sound keeps till the mount state sensing switch device 13 is released, the sound is identified from a call tone, a fault of the mount state of the slave set main body 4 is informed and theft or mischief is prevented. Moreover, video information picked up by a pickup device 10 is received by a receiver 24 of the master set 20 and the fault state is confirmed on a screen of a monitor 23.

Description

[Detailed Description of the Invention] [Objective of the Invention] (Industrial Field of Application) The present invention relates to an intercom device, and the present invention relates to an intercom device, and the present invention relates to an intercom device, which is used for installation of a handset unit, such as when a handset unit installed outdoors such as a gate or door is removed. Regarding things that notify the status.

(Prior art) Recently, expensive devices with video functions are known as this type of intercom device, but in order to prevent the handset from being removed due to theft or mischief, The heads of the mounting screws that attach the main unit to the base have a special shape, and the handset main body cannot be removed from the base without a special tool.

(Problems to be Solved by the Invention) With the structure in which the main body of the handset is attached to the base using the special mounting screws mentioned above, the main body of the handset cannot be removed without special tools for inspection and repair, and it is difficult to remove the handset main body from the base using the special mounting screws. In the case of a prank, there was a problem in that the handset body could be forcibly removed using tools such as pliers.

The present invention has been made in view of the above-mentioned problems, and the ring tone generation circuit of the base unit is activated by a ring switch when the handset body is abnormally attached to the base, such as when it is removed from the base. To provide an intercom device in which an abnormality in the installation state of a handset body is notified on the base side by driving this ringing tone generation circuit, and the installation structure of the handset body can be simplified.

[Structure of the invention]

(Means for Solving the Problems) An intercom device of the present invention has a ring switch that is detachably attached to a base fixed to a built structure and connected to a ring tone generation circuit of a base unit by at least a cable. an installation state detection switch that is provided with a main unit and detects an abnormality in the installation state of the main unit on either the main unit or the base and drives a ringing tone generation circuit of the main unit via the cable; It is equipped with a mechanism.

(Function) In the intercom device of the present invention, when a normal call is made by operating the call switch on the main body of the handset, the ring tone generation circuit of the base unit is driven via the cable when the call switch is closed, and a ring tone is emitted. . When the main body of the handset lifts up from the base or is removed due to loosening of the mounting screws, the installation state detection switch mechanism is activated, and the call switch and the ring tone generating circuit of the base unit are connected via the cable that connects the ring switch to the base unit. The ring tone generating circuit of the handset unit is activated, and the ring tone generation circuit generates a ring tone continuously while the handset unit returns to its normal installation state, and a ring tone is generated to notify an abnormality in the installation state of the handset unit body. becomes.

(Example) Next, the configuration of an embodiment of the present invention will be explained with reference to the drawings.

In FIGS. 1 to 3, 1 is a base, and this base 1 is fixed to the outdoor side of structures such as gates and doors. A locking portion 2 is formed at the upper end of the base 1, and a cylindrical attachment boss portion 3 is protruded from the lower end.

Reference numeral 4 denotes a main body of the slave device, which is formed in a cylindrical shape with an open inner side, and an engaging protrusion 5 at the upper end of the main body 4 is removably engaged with the engaging portion 2 of the base 1. A four-step portion 6 is formed on the outer surface of the lower end portion, and a mounting screw insertion hole 7 facing the mounting boss portion 3 is formed in this recessed step portion 6 .

Further, a push button 9 of a call switch 8 mounted on the handset main body 4 facing inside the front is projected from the front.

Furthermore, this handset main body 4 includes an imaging device 10 and a speaker 11.
, a microphone 12 is mounted facing the front.

Furthermore, this slave device main body 4 is provided with an attachment state detection switch mechanism 13, and this attachment state detection switch mechanism 1
3 is provided with an elastic movable contact piece 15 that is pressed by the mounting boss 3 and separates from the fixed contact piece 14 when the handset main body 4 is normally attached to the base plate 1; When the handset body 4 rises or separates from the base 1, it comes into contact with the fixed contact piece 14, and the attachment state detection switch mechanism 13 is closed.

Next, as shown in FIG. 4, the imaging device 10 includes an electronic camera unit 16, a video signal processing section I7, and a modulation section 18. In addition, the speaker 11 and the microphone 1
2 is connected to the audio signal processing section 19.

The base device 20 installed indoors includes an image receiving device 24 consisting of a demodulation section 21, a video signal processing section 22, and a monitor device 23, a handset 26 such as a handset connected to an audio signal processing section 25, and a ringer. A speaker 28 connected to the circuit 27 is provided.

The modulation unit 18 of the imaging device 10 and the image receiving device 24
, the audio signal processing section 19 of the handset body 4 is connected to the audio signal processing section 25 of the main unit 20 , and the call switch 8 and the installation state detection switch mechanism 13 are connected to the ringing tone generation circuit 27 . The slave device body 4 and the parent device 20 are connected by a coaxial cable 30 so that they are connected to each other.

Next, the operation of this embodiment will be explained.

An engagement protrusion 5 is provided on the base 1 of the handset main body 4 and is detachably engaged with the locking part 2.
In addition, the mounting screw 31 inserted through the mounting screw insertion hole 7 formed in the recessed step 6 of the handset main body 4 is fixed to the mounting boss 3 of the base 1 by screwing and tightening. In this state, the movable contact piece 15 of the installation state detection switch mechanism 13
is pressed by the mounting boss portion 3 and separated from the fixed contact piece 14, and the mounting state detection switch mechanism 13 is opened.

In this state, when the call switch 8 is closed, the cable 3
0, the ring tone generation circuit 27 is driven, and the speaker 28 of the base unit 20 generates a ring tone while the ring switch 8 is closed.

Further, the video information photographed by the imaging device 10 is transmitted to the base unit 20.
The image can be received by the image receiving device 24 of the main unit 4, and audio information from the microphone 12 of the main unit 4 is transmitted to the handset 26 of the main unit 20. Further, the audio signal from the handset 26 of the main unit 20 is transmitted to the speaker 11 of the main unit 4 of the handset.

In addition, when the attachment screw 31 attached to the base 1 of the slave body 4 is loosened or removed, and the slave body 4 is lifted up or separated from the base 1, the movable contact piece 15 of the attachment state detection switch mechanism 13 The pressure from the mounting boss 3 is released, the mounting state detection switch mechanism 13 is closed, the calling sound generation circuit 27 is driven, and a sound is generated from the speaker 28. This sound is heard when the mounting state detection switch mechanism 13 is opened. Since the sound continues until the sound is heard, it is recognized as a ringing sound, and an abnormal state of the installation state of the handset body 4 is notified, thereby preventing theft or mischief. Also at this time, the imaging device 10
The video information photographed can be received by the image receiving device 24 of the base unit 20, and abnormal conditions can be confirmed on the screen of the monitor device 23.

Further, in the embodiment, the installation state detection switch mechanism 1
3 is a fixed contact piece 14 that is pressed by the mounting boss 3 when the main body 4 of the slave device is normally attached to the base 1.
Although a structure including an elastic movable contact piece 15 that separates from the base unit 1 has been described, the structure is not limited to this structure. With the main body 4 attached to the base 1, a magnetic shielding plate is provided on the base 1 to be inserted between the reed switch and the permanent magnet, and when the slave body 4 is separated from the base 1, the magnetic shielding plate is inserted between the reed switch and the permanent magnet. It is also possible to remove it from between the permanent magnet and close the reed switch to drive the ring tone generation circuit 27.

Further, in the embodiment, the installation state detection switch mechanism 13
is provided on the handset main body 4, but it can also be attached to the base plate 1.

〔Effect of the invention〕

According to the present invention, the installation state detection switch detects an abnormality in the installation state of the handset body and drives the ring tone generation circuit of the base unit on either one of the handset body and the base on which the handset body is attached. With this mechanism, when a normal call is made by operating the call switch on the handset, the closing of the call switch drives the ring tone generation circuit on the base unit, allowing the normal ring tone to be emitted, allowing the handset to switch to the base unit. When it is lifted up or removed from the base unit, the installation state detection switch mechanism is activated, and the ring tone generation circuit of the base unit is driven via the cable that connects the call switch and the ring tone generation circuit of the base unit, and this ring tone is emitted. Due to the drive of the generating circuit, a ringing tone is generated continuously while the handset body returns to the normal installation state, and becomes a sound that alerts the handset to an abnormality in the installation state, making it easier to steal or mischief the handset body. This can be prevented.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway side view of the handset main body of an intercom device showing an embodiment of the present invention, Fig. 2 is a side view showing the same handset main body removed from the base, and Fig. 3 4 is a perspective view of the above board, and FIG. 4 is a wiring block diagram of the above intercom device. 1...Base, 4...Slave device body, 8...Call switch, 1
3. Installation state detection switch mechanism, 20. Base unit, 27
...Ring tone generation circuit, 30...Coaxial cable. L-- 111'')su l[

Claims (1)

[Claims] (1) A handset main body having a call switch that is detachably attached to a base fixed to a structure and connected to a ring tone generating circuit of the base machine by at least a cable, and a connection between the handset main body and the base. An intercom device characterized in that an attachment state detection switch mechanism is provided on either one of the slave units to detect an abnormality in the attachment status of the handset body and drive a ring tone generation circuit of the base unit via the cable.