JP3041666B2 - Exposure-mounted hands-free TV intercom unit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exposure-mounted type which is used for interphone communication with a visitor while monitoring an image picked up by a camera-equipped intercom with a camera installed at the entrance of a house or the like. It relates to a hands-free TV intercom unit.

[0002]

2. Description of the Related Art As is well known, in this kind of hands-free television intercom unit, a flat-type cathode ray tube for displaying a monitor image, a microphone and a speaker for executing an interphone call, and an interphone call and image processing A circuit board or the like provided with an electric circuit for controlling the above is housed in the unit case. Conventionally, when mounting various parts such as a speaker and a circuit board, these parts were screwed to the unit case.

[0003]

In the above-mentioned conventional means for fixing each part by screwing, screw tightening work and the like are complicated, and the assembling workability is poor. Since it is necessary to form the female screw portion after forming the screw, it is necessary to secure an extra space for forming the screwing dowel in the unit case, and there has been a problem that the whole unit becomes large.

In this type of hands-free television intercom unit, a circuit board for controlling image processing, interphone communication, and the like has a considerably large size. Conventionally, this circuit board has a large width. And housed in the unit case. Therefore, it is necessary to form the unit case in a dimension wider than such a circuit board. This also causes a problem that the entire unit becomes large and that it is difficult to handle the unit as an exposed mounting type unit.

[0005] The present invention has been proposed in view of the above points, and an object of the present invention is to make it possible to appropriately reduce the size of an exposed mounting type hands-free TV intercom unit and to simplify the assembling work. That is the purpose.

[0006]

According to the first aspect of the present invention, there is provided a hands-free television intercom unit of an exposure mounting type according to the present invention. In each of the above, when the speaker is disposed at a position lower than the display screen of the flat-type cathode ray tube with the speaker facing one of the wall surfaces of the lower surface and the left and right side surfaces of the case body and the front cover. Is provided with a concave groove portion into which a part of the outer peripheral edge of the speaker can be fitted. It is configured so that both sides are fitted and held.

According to a second aspect of the present invention, there is provided the hands-free TV intercom unit of the exposure mounting type according to the first aspect of the present invention, wherein a speaker is provided on the case body or the front cover instead of the concave groove. A part of the outer peripheral edge of the speaker when the lower surface of the main body and the front cover is disposed at a position lower than the display screen portion of the flat cathode ray tube so as to face any one of the wall surfaces of the left and right side surfaces. Are provided such that when the front cover is overlaid on the case body, both sides of the outer peripheral edge of the speaker are supported by the support claws of the case body and the front cover. I have.

[0008] Hands-free television interphone unit exposure mount according to the present invention described in claim 3, inter
Microphone and speaker for telephone calls and monitor images
Exposure tube in which the flat cathode ray tube for
Hands-free TV intercom unit
The speaker on the lower surface of the case body and the front cover.
And facing one of the wall portions of the left and right side portions
Positioned below the display screen of the flat-type cathode ray tube
When the front cover is overlaid on the case body
The speaker on both the case body and the front cover.
And holding means for holding both sides of the sheet .

[0009] Hands-free television interphone unit exposure mount according to the present invention according to claim 4, inter
Microphone and speaker for telephone calls and monitor images
Exposure tube in which the flat cathode ray tube for
Hands-free TV intercom unit
Te, each inside of the case body and the front cover, before Symbol
Place the speakers on the bottom and left and right sides of the case body and front cover.
The flat type shadow is made to face any one of the wall portions.
When placed at a position lower than the display screen of the CRT
Is provided with holding means for holding a part of the speaker,
When the front cover is overlaid on the case body,
The holding means on both the case body and front cover
The two sides of the peaker are configured to be held.

[0010]

According to the first aspect of the present invention, in the exposed hands-free television intercom unit according to the present invention, both sides of the outer peripheral edge of the speaker are fitted into the concave grooves of both the case body and the front cover. Since the unit case can be assembled in such a state, the speaker can be properly fixed without screwing. Further, since the speaker is arranged at a position below the wide display screen of the flat cathode ray tube (at the side of or below the deflection yoke of the flat cathode ray tube), the speaker is located at the side of the flat cathode ray tube. The speaker can be mounted by effectively using the free space of the speaker.

According to a second aspect of the present invention, in the hands-free television intercom unit of the present invention, both sides of the outer peripheral edge of the speaker are supported by the supporting claws of the case body and the front cover. Since the case can be assembled, the speaker can be appropriately fixed without screwing, as in the case of the first aspect.

[0012] In the exposure-mounted hands-free television interphone unit according to the present invention described in claim 3, wherein
When the front cover is overlaid on the case
Both sides of the speaker on both the case body and the front cover
Is retained, so that the speaker can be
It can be fixed sharply.

[0013]

[0014] In the hands-free television interphone unit exposure mount according to the present invention according to claim 4, cable
Both the speaker and the front cover
Assembling the unit case with the sides held
Without the need to screw the speaker
Can be fixed.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view of an exposure-mounted hands-free television intercom unit U according to the present invention, and FIG.
Is a perspective view of the assembled state. This intercom unit U includes a flat-type cathode ray tube 2,
The speaker SP, the first circuit board 3A, the second circuit board 3B and the like are accommodated therein. In each figure,
Desired electronic components are mounted on each of the circuit boards 3A and 3B, but these are omitted for convenience.

The unit case 1 is assembled by superposing the front cover 1B on the front side of the case body 1A. As shown in FIG. 1, the case main body 1A is provided with a total of four stepped bosses 4 having insertion holes 40 through which the screws 9 are inserted from the rear side of the case main body 1A. Is provided with a boss 4a having a screw hole 41. With this structure, the case main body 1A and the front cover 1B can be fixed using the screws 9 as shown in FIG.

FIG. 5 is a perspective view of a main part showing a structure for attaching the speaker SP to the lower surface 11 of the case body 1A, and FIG.
Is a sectional view taken along line X3-X3. As shown in each of these figures, a frame 6 having an arc-shaped notch is formed inside the lower surface 11 of the case body 1A.
A groove 5 is provided between the two. This concave groove 5 is for fitting a portion of about half the outer peripheral edge of the speaker SP. Further, a ventilation hole 14 for speaker sound is appropriately formed in the lower surface portion 11.

On the other hand, the fixing means for the speaker SP as described above is also provided on the front cover 1B side. As shown in FIG. 1, a frame 6a is provided inside the lower surface 11a of the front cover 1B. A recessed groove 5a is provided between the frame 6a and the lower surface 11a to fit the remaining portion of the outer peripheral edge of the speaker SP. Also, a ventilation hole 14a is formed as appropriate.

According to the above structure, the speaker SP can be mounted by the following operation. That is, first, as shown in FIG. 7 (a), after inserting vibration-proof packings 16 and 16a such as foamed silicon into each of the concave grooves 5 and 5a of the case body 1A and the front cover 1B, Case body 1A
The outer peripheral edge of the speaker SP is fitted into the concave groove portion 5 of FIG. Next, the front cover 1B is overlaid on the case body 1A,
These may be fixed using screws 9. In this work, as shown in FIG. 8, the outer periphery of the speaker SP can be fitted and held in the concave grooves 5, 5a of both the case body 1A and the front cover 1B. 1 can be securely fixed without being screwed to 1.

In this intercom unit U,
As shown in FIG. 3, a flat cathode ray tube 2 is accommodated in a unit case 1. The flat cathode ray tube 2 has a wide display screen portion 2a on an upper side thereof and a lower side thereof. Is provided with a narrow deflection yoke 2b, and a relatively large space is generated around the deflection yoke 2b. The speaker SP is mounted on the lower surface side of the unit case 1 and is mounted by effectively utilizing the space generated around the deflection yoke 2b.
There is no need to separately secure a space for mounting the speaker SP in the unit case 1, which helps to reduce the size of the unit case 1. Further, if the speaker SP is directed downward and the microphone MC is directed forward, it is possible to prevent the howling phenomenon from occurring during the intercom call as much as possible.

FIG. 9 is a perspective view of a main part showing another example of the mounting means of the speaker SP, and FIG. 10 is a sectional view taken along line X4-X4. In the configurations shown in these figures, a plurality of support claws 6A are provided inside the lower surface 11 of the case main body 1A, and the rear side of the outer peripheral edge of the speaker SP arranged in contact with the lower surface 11 is supported. It is a configuration that can be supported by the claw 6A (corresponding to claim 2). The supporting claws similar to the supporting claws 6A are provided not only on the case body 1A side but also on the front cover 1A.
It is also provided on the B side (not shown). Even in such a configuration, as in the case shown in FIGS. 5 and 6, when the front cover 1B is overlaid on the case main body 1A, both sides of the outer peripheral edge of the speaker SP are appropriately positioned by the support claws 6A. The speaker SP need not be screwed.

In each of the above embodiments, the speaker SP
Has been described as an example, in which the unit is mounted on the lower surface of the unit case 1 in a downward direction, but the present invention is not limited to this. For example, the concave grooves 5, 5a shown in FIG. 1 are provided at any one of the left and right side surfaces 12, 13 of the case body 1A and the corresponding side surface of the front cover 1B.
The speaker SP may be mounted so as to face any one of the left and right side surfaces of the unit case 1.

Next, the mounting structure of each part other than the speaker SP will be described. In FIG. 1, a first circuit board 3A incorporates various control circuits for executing an intercom call performed between a microphone MC and a door phone with camera via a speaker SP. . The microphone MC is provided at an appropriate position such as the front surface of the unit case 1 as shown in FIG. On the other hand, the second circuit board 3B incorporates a television circuit for executing image control of an image signal which is picked up by an intercom with a camera (not shown) and projected on the flat type cathode ray tube 2. The first and second circuit boards 3
A and 3B are configured as separate circuit boards separated from each other. The width S1 of the first circuit board 3A is formed to be wider than the width S2 of the second circuit board 3B, and the width S1 is set to be substantially the same as the width of the flat cathode ray tube 2. ing.

The first circuit board 3A has through-holes 30, 30 provided on both side edges thereof and a semicircular notch 31,
By fitting 31 into stepped boss 40 of case body 1A, it is positioned and accommodated in case body 1A as shown in FIG. The flat cathode ray tube 2 is mounted on the upper surface side of the first circuit board 3A. With such a configuration, the first circuit board 3A can be efficiently attached to the space between the rear side of the flat cathode ray tube 2 and the rear portion 10 of the case body 1A.

On the other hand, as means for mounting the second circuit board 3B, for example, two pairs of ribs 7, 7a are assembled on one side of the case body 1A, and these ribs 7, 7a are assembled.
Are formed between each other. The substrate holding groove 8 is designed to be arranged on the side of the flat cathode ray tube 2. The second circuit board 3B is held in the board holding groove 8 in a standing state by being inserted into the board holding groove 8 in the thickness direction by the ribs 7 and 7a.
Then, as shown in FIG. 4, when the front cover 1B is attached to the case body 1A, the second circuit board 3B does not come off in the direction of arrow a due to the presence of the front cover 1B, and the unit case 1 Properly fixed within.

In the above configuration, since the second circuit board 3B is held in an upright state, unlike the case where the second circuit board 3B is accommodated in the unit case 1 in a non-upright state, FIG. As shown, the width S of the unit case 1
Does not need to be much larger than the width S1 of the first circuit board 3A, and the unit case 1 can be downsized. Also, as with the first circuit board 3A, it is not necessary to screw the second circuit board 3B into the unit case 1, and the assembling work can be easily performed.

FIG. 11 is a cross-sectional view of a main part showing another embodiment of the mounting structure of the second circuit board 3B. The structure shown in the figure is one in which a locking claw 70 is erected on the case body 1A.
At the tip of the locking claw 70, there is provided a lateral claw portion 71 which is fitted and locked in the locking hole 32 formed along the thickness direction of the second circuit board 3B. In such a configuration, by locking the second circuit board 3B to the claw portion 71 of the locking claw 70, the second circuit board 3B can be held upright on one side of the flat cathode ray tube 2. In such a locked state, the second circuit board 3B is also prevented from falling out in the direction of arrow b, and the case body 1
The second circuit board 3B can be fixed without attaching the front cover 1B to A. Accordingly, not only the space for mounting the second circuit board 3B can be reduced, but also there is no problem that the second circuit board 3B comes off in the direction of arrow b and comes off from the case body 1A before the front cover 1B is mounted. can do.

The locking claw 70 shown in FIG.
The substrate holding groove 8 indicated by may be provided on the front cover 1B side, for example, without being provided on the case body 1A side. In this case, for example, the tip of the second circuit board 3B held by the board holding groove 8 provided in the front cover 1B may be brought into contact with the first circuit board 3A to prevent the second circuit board 3A from being removed. Absent.

[0029]

As will be understood from the above description, according to the hands-free television intercom unit of the present invention according to any one of claims 1 to 4 , the speaker is screwed. The case body
Since the bars can be mounted in the unit case by overlapping , the assembling work can be facilitated, and there is no need to form a dowel for screwing in the unit case as in the conventional case. A special effect is obtained in that unnecessary wasteful space can be eliminated and the entire unit can be reduced in size. Moreover, since the speakers are arranged below the wide display screen of the flat-type cathode ray tube, the speakers can be mounted by effectively using the empty space on the side of the flat-type cathode ray tube, and the whole unit can be reduced in size. It is possible to further thorough conversion.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an example of an exposed mounting type hands-free television intercom unit according to the present invention.

FIG. 2 is a perspective view showing an example of an external configuration of an exposed mounting type hands-free television intercom unit according to the present invention in an assembled state.

FIG. 3 is a front view showing an example of a state in which components are assembled into a case main body of the hands-free television intercom unit of the exposure mounting type according to the present invention.

FIG. 4 is a sectional view taken along line X2-X2 in FIG. 3;

FIG. 5 is a perspective view of a main part showing an example of a speaker mounting structure according to the present invention.

FIG. 6 is a sectional view of a main part taken along line X3-X3 of FIG. 5;

FIGS. 7A to 7C are explanatory diagrams showing an example of a speaker assembling process.

FIG. 8 is a cross-sectional view of a main part along X1-X1 of FIG. 2;

FIG. 9 is a perspective view of a main part showing another example of the mounting structure of the speaker according to the present invention.

FIG. 10 is a sectional view of a main part taken along line X4-X4 of FIG. 9;

FIG. 11 is a cross-sectional view of a main part showing another example of the mounting structure of the second circuit board according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Unit case 1A Case main body 1B Front cover 2 Flat type cathode ray tube 2a Display screen part 2b Deflection yoke 3A First circuit board 3B Second circuit board 4, 4a Boss 5, 5a Concave groove(Corresponding to the holding means of the present invention)  6,6a Frame 6A Supporting claw(Corresponding to the holding means of the present invention)  7, 7a rib 8 board holding groove 9 screw 32 locking hole 70 locking claw 71 claw portion MC microphone SP speaker U exposed hands-free TV intercom unit
To

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H04M 1/02-1/23 H04M 9/00-9/10 H04N 5/64 H04N 7/18

Claims (4)

(57) [Claims] 1. A unit case formed by a case body and a front cover thereof, wherein a microphone and speaker for intercom communication and a flat-type cathode ray tube for displaying a monitor image are housed in an exposed mounting. A hands-free television intercom unit, wherein the speaker faces each of the lower surface and the left and right side surfaces of the case body and the front cover in each of the case body and the front cover. When the flat-type cathode ray tube is arranged at a position lower than the display screen portion, a concave groove portion that allows a part of an outer peripheral edge of the speaker to be fitted therein is provided, and when a front cover is overlapped with the case body, ,
An exposed mounting hands-free television intercom unit, characterized in that both sides of the outer peripheral edge of the speaker are fitted and held in the concave grooves of both the case body and the front cover. 2. A unit case formed by a case body and a front cover thereof, wherein a microphone and speaker for intercom communication and a flat-type cathode ray tube for displaying a monitor image are housed in an exposed mounting. A hands-free television intercom unit, wherein the speaker faces each of the lower surface and the left and right side surfaces of the case body and the front cover in each of the case body and the front cover. When the flat-type cathode ray tube is disposed at a position lower than the display screen portion, a support claw that can support a part of the outer peripheral edge of the speaker is provided, and when a front cover is overlapped with the case body, ,
An exposed mounting hands-free television intercom unit, characterized in that both sides of the outer peripheral edge of the speaker are supported by the supporting claws of both the case body and the front cover. (3)Microphone and speaker for intercom call
And a flat cathode ray tube for displaying monitor images
Exposed hands-free TV interface
Phone unit, Place the speaker on the bottom of the case body and the front cover and on the left
The flattening is performed by facing any one of the right side walls.
To a position below the display screen of the cathode ray tube, When the front cover is overlaid on the case body,
Both the case body and the front cover
Exposure means having holding means for holding the side.
An attached hands-free TV intercom unit. (4)Microphone and speaker for intercom call
And a flat cathode ray tube for displaying monitor images
Exposed hands-free TV interface
Phone unit, The inside of each of the case body and the front cover is
The lower case and the left and right sides of the case body and front cover.
The flat cathode ray by facing any one of the wall portions
When placed below the display screen of the tube,
Holding means for holding a part of the speaker of When the front cover is overlaid on the case body,
The holding means on both the case body and front cover
Make sure that both sides of the peaker are configured to be held
Features a hands-free TV interface for exposed mounting
Unit.