JP3031360B2 - Intercom unit with monitor TV - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in an intercom unit with a monitor television which is installed in a dwelling unit or the like and used for intercom communication with a visitor.

[0002]

2. Description of the Related Art Conventionally, as this kind of intercom unit with monitor TV Ue, the one shown in FIG. 4 has been proposed. The intercom unit Ue reproduces and outputs the video signal transmitted from the intercom slave unit 30 including the imaging camera 31 via the wiring L on the monitor television 20, and outputs the video signal of the visitor displayed on the monitor television 20. It is configured such that an interphone call using the microphone MC1 and the speaker SP1 can be executed between the doorphone slave device 30 and the video while watching the video. In the intercom unit Ue having such a configuration, as shown in FIG. 5, the deflection yoke 2 connected to the CRT 2 of the monitor television 20 is used.
If the speaker SP1 is provided in the area around the area a (the area B shown by cross-hatching), the magnetic flux of the speaker SP1 has an adverse effect on the deflection yoke 2a, and many noises are mixed in the reproduced image. Occurs. Therefore, conventionally, the speaker SP1 is connected to the CRT 2
Alternatively, the speaker SP1 is provided outside the area B by providing the speaker SP1 in a forward position at a position on the side of the deflection yoke 2a.

On the other hand, in the related art, when the monitor television 20 is mounted, as shown in FIGS. 6A and 6B, a television circuit for controlling the drive of the monitor television 20 (in a portion B1 indicated by cross-hatching). In fact, the printed circuit board 32 provided with the Eq. (Equivalent) was disposed on the back side of the cathode ray tube 2 and the deflection yoke 2a. Conventionally, not only the television circuit B1 but also the printed circuit board 32
A main circuit (not shown) required for controlling each section of the intercom unit Ue was also provided.

[0004]

However, even in the conventional configuration shown in FIG. 6, since the television circuit B1 is arranged on the back side of the cathode ray tube 2 and the deflection yoke 2a, the thickness of the television circuit B1 is not large. The overall width S was increased by S1. Moreover, in order to prevent adverse effects of noise on the television circuit B1, it is necessary to provide other necessary circuits (main circuits) as far as possible from the television circuit B1. Therefore, conventionally, the horizontal width (b1 + b2 ') of the entire printed circuit board 32 is increased to provide a main circuit at a lateral position (a position corresponding to b2') of the cathode ray tube 2 or the like. There is a problem that the unit Ue is enlarged.

The present invention has been proposed in view of the above points, and has as its object to appropriately reduce the size of an intercom unit with a monitor television.

[0006]

An intercom unit with a monitor television according to the present invention according to claim 1 proposed to achieve the above object, comprises a front case and a rear case.
And a monitor television interphone unit incorporating a monitor television for projecting a monitor image in a unit case formed from the above and two circuits constituting a circuit for controlling interphone calls and the like and driving the monitor television. One of the printed circuit boards is disposed at a side position of the cathode-ray tube, provided in a lateral state facing the side surface of the cathode-ray tube , and a unit case.
It is provided in parallel with the direction of the thickness width in the front-back direction of the metal .

According to a second aspect of the present invention, there is provided an intercom unit with a monitor television, comprising a front case and a rear case.
And a monitor television interphone unit incorporating a monitor television for projecting a monitor image in a unit case formed from the above and two circuits constituting a circuit for controlling interphone calls and the like and driving the monitor television. One printed circuit board is arranged at a side position of the cathode ray tube, provided in a state perpendicular to the other printed circuit board, and provided in parallel with the direction of the thickness width in the front-rear direction of the unit case. ing.

According to a third aspect of the present invention, an intercom unit with a monitor television according to the present invention comprises a front case and a rear case.
And a monitor television interphone unit having a built-in monitor television for projecting a monitor image in a unit case formed from the above, wherein a printed circuit board having a television circuit for driving the monitor television is provided on the side of the cathode ray tube. In a horizontal position facing the side of the cathode ray tube , and
It is provided in parallel with the direction of the thickness width in the front-back direction of the metal .

According to a fourth aspect of the present invention, an intercom unit with a monitor television according to the present invention comprises a front case and a rear case.
A monitor with television interphone unit monitor television is built for displaying an monitor image unit casing formed of the intercom call, etc.
And a circuit for driving the monitor TV
A printed circuit board having a television circuit for driving a monitor television, the printed circuit board being provided at a side position of the cathode ray tube, being provided in a state perpendicular to the other printed circuit board , and a unit. Case front-back direction
Are provided in parallel with the thickness width direction .

According to a fifth aspect of the present invention, there is provided an intercom unit with a monitor television according to the third aspect of the present invention.
In either case, the printed circuit board including the television circuit is provided separately from a printed circuit board including a main circuit for controlling other units in the monitor television intercom unit.

[0011]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory diagram showing an example of the internal structure of an intercom unit with monitor TV U according to the present invention,
FIG. 2 is a sectional view thereof, and FIG. 3 is a perspective view of the intercom unit U shown in FIG. This intercom unit U
Are provided in a unit case 1 formed of a front case 1a and a rear case 1b, in a cathode ray tube 2 and a deflection yoke 2a.
And the like, and a printed circuit board 3, 4 and the like, which constitute a circuit for controlling these units, a speaker SP and a microphone MC for interphone communication, and the like.

Here, one of the two printed boards 3 and 4 is mainly used for controlling interphone calls and the like executed between the door boards and a slave unit (not shown). The printed circuit board 4 is provided on the back side of the cathode ray tube 2 and the deflection yoke 2a of the monitor television 20. On the other hand, the other printed circuit board 3 is provided with a television circuit for controlling the driving of the monitor television 20, and is formed separately from the one printed circuit board 4 to form the cathode ray tube 2 and the deflection yoke 2a. It is located in a lateral position. The printed circuit board 3 is set in a horizontal state so as to face the side surfaces of the cathode ray tube 2 and the deflection yoke 2a, and the cathode ray tube 2 of the monitor television 20 or the one printed circuit board 4 via the wirings 5, 5a. Is connected to

The speaker SP and the microphone MC are wired and connected to the main circuit of the one printed circuit board 4, and the speaker SP is the deflection yoke 2 of the monitor television 20.
It is attached to the bottom surface 1A of the unit case 1 so as to be disposed at a position lower than a. The speaker SP is set downward. On the other hand, the microphone MC is provided at a front position of the unit case 1 so as to face forward.

In the intercom unit U with a monitor television having the above structure, the microphone MC is provided at the front position of the unit case 1 so as to face forward. Since the speaker SP has a downward direction different from the direction of the microphone MC, the sound generated from the speaker SP is difficult to be input to the microphone MC, so that an unjust howling phenomenon can be prevented. Also, during an intercom call with a camera-equipped intercom slave unit (not shown), the video signal transmitted from the intercom-equipped slave unit can be reproduced on the monitor TV 20 and displayed on the CRT 2, but the speaker SP is deflected. The magnetic flux of the speaker SP does not adversely affect the deflection yoke 2a because it is provided at a position at least a predetermined distance from the yoke 2a. Furthermore, since the printed circuit board 3 provided with the television circuit is provided separately from the other printed circuit board 4 provided with the main circuit, the adverse effect of noise from the main circuit on the television circuit can be suppressed. Therefore, the monitor TV 20
The CRT 2 can reproduce and output an appropriate image with little noise.

Further, the intercom unit U having the above configuration
Now, the CRT 2 and the deflection yoke 2 of the monitor TV 20
It is not necessary to secure a space for providing the speaker SP at the side position of “a”, and in such a position, only a space for providing the printed circuit board 3 including the television circuit in a thin horizontal state is provided. Is fine. Therefore, the width required to secure the side of the cathode ray tube 2 and the deflection yoke 2a may be small, the width of the unit case 1 can be reduced, and the television circuit does not need to be provided on the back side of the cathode ray tube 2 or the deflection yoke 2a. The thickness of the unit case 1 in the front-rear direction can also be reduced.

As described above, in the above-described intercom unit with monitor television, the printed circuit board having the television circuit for driving the monitor television is provided at the side of the cathode ray tube. This eliminates the problem that the overall thickness of the cathode ray tube in the rear side direction is increased as in the case where a television circuit is provided. Further, since the printed circuit board including the television circuit is provided in a horizontal state, the width of the printed circuit board as viewed from the front side of the unit case can be reduced, and the width of the entire unit case is prevented from increasing. it can.

Further, the printed circuit board provided with the television circuit is provided separately from the printed circuit board provided with the main circuit for controlling other parts in the intercom unit with monitor television. It is possible to appropriately prevent the noise from adversely affecting the operation of the television circuit, and to improve the reproduced image on the monitor television.

[0018]

As will be understood from the above description, according to the first or second aspect of the present invention, one of the two printed circuit boards having a circuit does not become bulky. Is located at the side of the cathode ray tube, so the width of the unit case can be kept small.
As well as the overall thickness
In addition, an effect that the intercom unit with a monitor television can be downsized can be obtained.

According to the third or fourth aspect of the present invention, the printed circuit board provided with the television circuit for driving the monitor television is provided at the side position of the cathode ray tube so as not to be bulky. In addition, an increase in the thickness of the cathode ray tube in the back side direction as in the related art can be eliminated, and the effect that the intercom unit with the monitor television can be downsized can be obtained.

In particular, according to the present invention, since the printed circuit board having the television circuit is separated from the printed circuit board having the main circuit, the operation of the television circuit is adversely affected by the noise of the main circuit. Can be appropriately prevented, and the advantage that the reproduced image on the monitor television can be improved is obtained.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing an example of the internal structure of an intercom unit with a monitor television according to the present invention.

FIG. 2 is a sectional view of the intercom unit with a monitor television shown in FIG. 1;

FIG. 3 is an exemplary perspective view showing the appearance of the intercom unit with a monitor television shown in FIG. 1;

FIG. 4 is a front view showing an example of a conventional intercom unit with a monitor television.

FIG. 5 is an explanatory view showing an example of the internal structure of a conventional intercom unit with a monitor television.

FIG. 6A is a front view showing another example of the internal structure of a conventional intercom unit with a monitor television, and FIG. 6B is a side view thereof.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Unit case 2 CRT 2a Deflection yoke 3 Printed circuit board 4 Printed circuit board 5, 5a Wiring 20 Monitor television MC Microphone SP Speaker U Interphone unit with monitor television

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Kaichi Tatsumi 1048 Kadoma Kadoma, Kadoma City, Osaka Prefecture Inside Matsushita Electric Works, Ltd. ) Surveyed fields (Int.Cl. ⁷ , DB name) H04M 1/02-1/23 H04M 9/00-9/10 H04N 5/64 H04N 7/18

Claims (5)

(57) [Claims] 1. A front case and a rear case.
An intercom unit with a monitor TV for displaying a monitor image in a unit case, comprising two printed circuit boards that constitute a circuit for controlling interphone calls and the like and for driving the monitor TV. One of the printed circuit boards is disposed at a lateral position of the cathode ray tube, provided in a lateral state facing the side surface portion of the cathode ray tube , and is flat in the thickness direction in the front-rear direction of the unit case.
An intercom unit with a monitor television, which is provided in a row . 2. A front case and a rear case.
An intercom unit with a monitor TV for displaying a monitor image in a unit case, comprising two printed circuit boards that constitute a circuit for controlling interphone calls and the like and for driving the monitor TV. One of the printed circuit boards is disposed at a side position of the cathode ray tube and provided perpendicular to the other printed circuit board ;
An intercom unit with a monitor television, wherein the intercom unit is provided in parallel with a thickness direction in a front-rear direction of the knit case . And a front case and a rear case.
An intercom unit with a monitor TV for displaying a monitor image in a unit case, wherein a printed circuit board having a TV circuit for driving the monitor TV is disposed at a side position of the CRT. The cathode ray tube is provided sideways facing the side surface of the cathode ray tube , and is flat in the direction of the thickness of the unit case in the front-rear direction.
An intercom unit with a monitor television, which is provided in a row . 4. A front case and a rear case.
A monitor with television interphone unit monitor television is built for displaying an monitor image in the unit case that drives the control or monitor television, such as interphone call
A printed circuit board having a television circuit for driving a monitor television is disposed at a side position of the cathode ray tube and is perpendicular to the other printed circuit board. Provided and unity
An intercom unit with a monitor television, which is provided in parallel with the direction of the thickness width in the front-rear direction of the case. 5. The printed circuit board according to claim 3, wherein the printed circuit board including the television circuit is a printed circuit board including a main circuit for controlling other units in the monitor television intercom unit. Intercom unit with monitor TV provided separately.