JPH07154459A - Exposed mount hands-free television interphone unit - Google Patents

Abstract

PURPOSE:To attain miniaturization and simple assembling work of an exposed mount hands-free television interphone unit. CONSTITUTION:This unit is constituted in such a way that recessed groove parts 5, 5a to which a part of the outer peripheral edge of a speaker SP can be inserted when the speaker SP is arranged at a position lover than the display screen part 2a of a flat type cathode-ray tube 2 by facing a wall plane part of either the lower plane or right/left side plane part of a case main body 1A and a front cover 1B are provided at each inside of the case main body 1A and the front cover 1B which comprise a unit case 1, and when the front cover 1B is superimposed on the case main body 1A, the unit can be supported by inserting both sides of the outer peripheral edge of the speaker SP to both recessed groove parts 5, 5a of the case main body IA and the front cover 1B.

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 applied for making an intercom call with a visitor while monitoring an image picked up by a doorphone with a camera installed at a doorway of a house or the like. Hands-free TV intercom unit.

[0002]

As is well known, in this type of hands-free TV intercom unit, a flat cathode ray tube for displaying a monitor image, a microphone and a speaker for performing an intercom call, an intercom call and image processing. A circuit board or the like having an electric circuit for controlling the above is housed in the unit case. Thus, conventionally, in the case of mounting each part such as a speaker or a circuit board, it is the actual situation that these parts are screwed to the unit case.

[0003]

In the above-mentioned conventional means for fixing each component by screwing, the tightening work of the screw is complicated and the assembling workability thereof is poor, and the screwing dowels and the like are attached at various places in the unit case. Since it is necessary to form the female screw portion after forming the above, it is necessary to secure an extra space for forming the screw fastening dowel in the unit case, which causes a problem that the entire unit becomes large.

Further, in this type of hands-free TV intercom unit, the circuit board for controlling image processing, intercom communication, etc. has a considerably large size, but in the past, this circuit board was a wide circuit board. And was housed in the unit case. Therefore, it is necessary to form the unit case to have a width wider than that of the circuit board. From this point also, the entire unit becomes large in size, and there is a problem that it is difficult to handle as an exposed mounting type unit.

The present invention has been proposed in view of the above points, and it is an object of the present invention to appropriately reduce the size of an exposure-mounted hands-free TV intercom unit and simplify the assembling work. Its purpose is.

[0006]

An exposed-mount type hands-free TV intercom unit according to the present invention, which is proposed to achieve the above object, is a case main body constituting a unit case and a front cover. When the speaker is placed in a position lower than the display screen of the flat-type cathode-ray tube so as to face the wall surface of the lower surface of the case body and the front cover, or one of the left and right side surfaces, Is provided with a recessed groove portion into which a part of the outer peripheral edge of the speaker can be fitted. When the front cover is superposed on the case main body, the recessed groove portions of both the case main body and the front cover are provided with the outer peripheral edge of the speaker. Both sides are configured to be fitted and held.

According to a second aspect of the present invention, the hands-free television intercom unit of the exposure mounting type according to the present invention has the constitution of the first aspect, in which the case body or the front cover is replaced with the recessed groove portion and a speaker is used as the case. A part of the outer peripheral edge of the speaker when the flat type cathode ray tube is arranged at a position lower than the display screen section so as to face the wall surface of one of the lower surface and the left and right side surfaces of the main body and the front cover. A support claw capable of supporting the speaker is provided, and when the front cover is superposed on the case main body, both sides of the outer peripheral edge of the speaker are supported by the support claws of both the case main body and the front cover. There is.

An exposure-mounted hands-free television intercom unit according to a third aspect of the present invention performs image control of a monitor image displayed by a flat cathode ray tube and intercom communication performed through a microphone and a speaker. A circuit board for controlling is divided into a first circuit board and a second circuit board, of which the first circuit board is disposed between the flat cathode ray tube and the rear portion of the case body. At the same time, the case body or the front cover is provided with a board holding groove for holding the second circuit board in the thickness direction and standingly holding the second circuit board in a lateral position of the flat cathode ray tube. When the front covers are overlapped with each other, the second circuit board held in the board holding groove is prevented from being pulled out in the front-rear direction.

According to a fourth aspect of the present invention, in the exposed-type hands-free television intercom unit according to the present invention, in the configuration of the third aspect, the case body or the front cover is replaced with the means for providing the board holding groove. , The flattened state in which the second circuit board is prevented from being pulled out in the front-rear direction by locking the claw portion in the locking hole formed along the thickness direction of the second circuit board. Locking pawls are provided to hold the die cathode ray tube in a lateral position.

[0010]

In the exposed-mount type hands-free TV intercom unit according to the present invention having the above-mentioned structure, both sides of the outer peripheral edge of the speaker are fitted in the concave groove portions of both the case body and the front cover. Since the unit case can be assembled in this state, the speaker can be properly fixed without being screwed. Further, since the speaker is arranged at a position lower than the wide display screen portion of the flat cathode ray tube (on the side of the deflection yoke of the flat cathode ray tube or at a position lower than the deflection yoke), the flat cathode ray tube side is disposed. It will also be possible to install a speaker that effectively uses the other free space.

In the exposed-type hands-free TV intercom unit according to the present invention as defined in claim 2, the unit is in a state in which both sides of the outer peripheral edge of the speaker are supported by the support claws of both the case body and the front cover. Since the case can be assembled, the speaker can be properly fixed without screwing, as in the case of claim 1.

In the exposed-mount type hands-free TV intercom unit according to the present invention as defined in claim 3, the circuit board is divided into the first circuit board and the second circuit board. The width of each of the circuit boards can be reduced. Therefore, it is possible to prevent the first circuit board, which is arranged between the flat cathode ray tube and the back surface of the case main body, from protruding to the side of the flat cathode ray tube with a large size, and to prevent the width of the unit case from increasing. Can be made smaller. If the first circuit board is sandwiched between the flat cathode ray tube and the back surface of the case main body, it is not necessary to screw the first circuit board.

On the other hand, since the second circuit board is held upright to the side of the flat cathode ray tube, the space for mounting the second circuit board can be made small and the width of the unit case can be increased. Can be prevented. Also, this second
The circuit board of 1 is inserted into the board supporting groove and is sandwiched, and in the assembled state of the unit case, the retainer in the front-rear direction is also prevented, so that the second circuit board is also screwed. Without this, it can be properly attached to a predetermined position in the unit case.

According to a fourth aspect of the present invention, in the exposed-mount type handsfree television intercom unit according to the present invention,
By locking the claw portions of the locking claws into the locking holes formed in the circuit board, the second circuit board can be held upright at the lateral position of the flat cathode ray tube. Again, screwing is not required as in the third aspect. However,
Unlike the case of claim 3, even if the front cover is not superposed on the case body of the unit case, the locking action of the locking hole and the locking claw of the second circuit board causes the second circuit board to move. Since it is possible to prevent the second circuit board from being pulled out in the front-rear direction, it is possible to prevent the second circuit board from accidentally coming off when the unit case is assembled, which is more convenient.

[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 TV intercom unit U according to the present invention, FIG.
FIG. 3 is a perspective view of the assembled state. This intercom unit U includes a flat type cathode ray tube 2 in a unit case 1,
The speaker SP, the first circuit board 3A, the second circuit board 3B, and the like are housed and configured. In each figure,
Although desired electronic components are mounted on each of the circuit boards 3A and 3B, they are omitted for convenience.

Of the above, the unit case 1 is assembled by stacking 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 back side of the case main body 1A. Is provided with a boss 4a having a screw hole 41. With this structure, it is possible to fix the case body 1A and the front cover 1B by using the screw 9 as shown in FIG.

FIG. 5 is a perspective view of an essential part showing a structure for mounting the speaker SP on the lower surface 11 of the case body 1A.
Is a sectional view taken along line X3-X3. As shown in each of these drawings, a frame portion 6 having an arcuate cutout portion is formed inside the lower surface portion 11 of the case body 1A, and the frame portion 6 and the lower surface portion 11 are formed.
A concave groove portion 5 is provided between and. The recessed groove portion 5 is for fitting about a half of 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, and as shown in FIG. 1, a frame portion 6a is provided inside the lower surface portion 11a of the front cover 1B. A recessed groove portion 5a is provided between the frame portion 6a and the lower surface portion 11a for fitting the remaining portion of the outer peripheral edge of the speaker SP. Further, the ventilation hole 14a is also appropriately formed.

According to the above structure, the speaker SP can be attached by the following work. That is, as shown in FIG. 7 (a), first, after inserting the antivibration packings 16 and 16a such as foamed silicon into the insides of the recessed grooves 5 and 5a of the case body 1A and the front cover 1B, respectively. Case body 1A
The outer peripheral edge of the speaker SP is fitted into the groove portion 5. Then, stack the front cover 1B on the case body 1A,
Both of them may be fixed with the screw 9. In such a work, as shown in FIG. 8, since the outer peripheral edge of the speaker SP can be fitted and held in the concave groove portions 5 and 5a of both the case body 1A and the front cover 1B, the speaker SP can be held. It will be possible to achieve a reliable fixing without screwing to 1.

Further, in this intercom unit U,
As shown in FIG. 3, the flat cathode ray tube 2 is housed in the unit case 1. The flat cathode ray tube 2 is provided with a wide display screen portion 2a on the upper side thereof, while being provided on the lower side thereof. Is provided with a narrow deflection yoke 2b, and a relatively large space is generated in the peripheral portion of the deflection yoke 2b. Thus, the above-mentioned speaker SP is attached to the lower surface side of the unit case 1 and effectively uses the space created 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. If the speaker SP faces downward and the microphone MC faces forward, the howling phenomenon can be prevented as much as possible during an intercom call.

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

In each of the above embodiments, the speaker SP
The case where the unit is attached to the lower surface of the unit case 1 facing downward has been described as an example, but the present invention is not limited to this. For example, the recessed groove portions 5 and 5a shown in FIG. 1 are provided at any one of the left and right side surface portions 12 and 13 of the case body 1A and the corresponding side surface portion of the front cover 1B.
The speaker SP may be attached in a state of facing the wall surface of 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, the first circuit board 3A incorporates various control circuits for performing an intercom call, which is performed between a door intercom subunit with a camera via a microphone MC and 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 has a built-in television circuit for performing image control of the image signal imaged by the intercom subunit with camera (not shown) and displayed on the flat 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 lateral width S1 of the first circuit board 3A is formed wider than the lateral width S2 of the second circuit board 3B, and the lateral width S1 is set to be approximately the same as the lateral width of the flat cathode ray tube 2. ing.

The first circuit board 3A has through holes 30, 30 and semi-circular cutouts 31, which are provided on both side edges thereof.
By fitting 31 into the stepped boss 40 of the case body 1A, the case body 31 is positioned and accommodated in the case body 1A as shown in FIG. The flat cathode ray tube 2 is placed and attached on the upper surface side of the first circuit board 3A. With this configuration, the first circuit board 3A can be efficiently attached to the space between the back surface side of the flat cathode ray tube 2 and the back surface portion 10 of the case body 1A.

On the other hand, as a means for attaching the second circuit board 3B, a pair of ribs 7 and 7a, for example, are assembled and installed on one side of the case body 1A.
A substrate holding groove 8 is formed between the two. Further, the substrate holding groove 8 is considered to be arranged on the side of the flat cathode ray tube 2. The second circuit board 3B is fitted in the board holding groove 8 in an upright state, and is thus held by the ribs 7 and 7a in the thickness direction.
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 out in the direction of arrow a due to the presence of the front cover 1B, and the unit case 1 Properly fixed in.

In the above structure, since the second circuit board 3B is held in the upright state, unlike the case where the second circuit board 3B is housed in the unit case 1 in the non-upright state, the configuration shown in FIG. The width S of the unit case 1 as shown
Does not need to be much larger than the lateral width S1 of the first circuit board 3A, and the unit case 1 can be downsized. Further, similarly to 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 essential parts showing another embodiment of the mounting structure for the second circuit board 3B. In the structure shown in the figure, a locking claw 70 is erected on the case body 1A,
At the tip of the locking claw 70, a lateral claw 71 that fits into the locking hole 32 formed along the thickness direction of the second circuit board 3B and locks is provided. In such a configuration, by locking the second circuit board 3B to the claw portions 71 of the locking claws 70, the second circuit board 3B can be held in an upright state on one side of the flat cathode ray tube 2. Further, in such a locked state, the second circuit board 3B is also prevented from coming out in the direction of the arrow b, and the case body 1
The second circuit board 3B can be fixed without attaching the front cover 1B to A. Therefore, it goes without saying that the mounting space for the second circuit board 3B can be reduced, and there is no problem that the second circuit board 3B comes out in the direction of the arrow b and comes off from the case body 1A before the front cover 1B is attached. can do.

Incidentally, the locking claw 70 shown in FIG. 11 and FIG.
The substrate holding groove 8 indicated by may not be provided on the case body 1A side, but may be provided on the front cover 1B side, for example. In this case, for example, the tip portion 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 removal. Absent.

[0029]

As can be understood from the above description, according to the hands-free TV intercom unit of the exposure mounting type according to the present invention as set forth in claims 1 and 2, the speaker is not screwed in the unit case. Since it can be mounted on the unit, the assembling work can be facilitated, and it is not necessary to form a dowel for screwing in the unit case as in the conventional case, and a useless space space required for mounting the speaker can be eliminated, A special effect is obtained that the size of the entire unit can be reduced. Moreover, since the speaker is arranged at a position lower than the wide display screen portion of the flat cathode ray tube, the speaker can be mounted by effectively utilizing the vacant space on the side of the flat cathode ray tube, and the overall size of the unit can be reduced. It is possible to make it even more thorough.

According to the hands-free TV intercom unit of the exposure mounting type according to the present invention as defined in claims 3 and 4, the circuit board is divided into the first circuit board and the second circuit board, and the first circuit is provided. Since the board is arranged on the rear side of the flat cathode ray tube and on the side of the flat cathode ray tube in the state where the second circuit board is erected, it is possible to prevent the width of the unit case from increasing. In addition, since it is not necessary to screw the first and second circuit boards together when they are attached, the assembly is facilitated and the circuit boards are screwed as in the case of claim 1. There is no need to form a dowel for this purpose inside the unit case, and there is the advantage that the entire unit can be made smaller.

Particularly, according to the present invention as set forth in claim 4,
Since the second circuit board is in a state in which it is prevented from pulling out in the front-rear direction by the locking action of the locking hole and the locking claw, before the case body of the unit case and the front cover are overlapped with each other. Even at the stage, the second circuit board does not accidentally fall off from the case body or the front cover, which is more convenient for assembly and the like.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an example of an exposure-mounted hands-free TV intercom unit according to the present invention.

FIG. 2 is a perspective view showing an example of an external configuration of an exposed and mounted hands-free TV interphone 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 incorporated into the case body of the exposed-mount type hands-free TV intercom unit according to the present invention.

4 is a sectional view taken along line X2-X2 of FIG.

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

6 is a cross-sectional view of main parts of X3-X3 in FIG.

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

FIG. 8 is a cross-sectional view of main parts of X1-X1 in FIG.

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

10 is a cross-sectional view of main parts of X4-X4 of FIG.

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

[Explanation of symbols]

1 unit case 1A case body 1B front cover 2 flat type cathode ray tube 2a display screen section 2b deflection yoke 3A first circuit board 3B second circuit board 4,4a boss 5,5a concave groove section 6,6a frame section 6A supporting claw 7, 7a Rib 8 Board holding groove 9 Screw 32 Locking hole 70 Locking claw 71 Claw MC Microphone SP Speaker U Exposed mount type hands-free TV intercom unit

Claims (4)

[Claims] 1. An exposed mounting in which a microphone and a speaker for intercom communication and a flat cathode ray tube for displaying a monitor image are housed in a unit case formed by a case body and a front cover thereof. A hands-free television intercom unit of the type, wherein the speaker is faced to a wall surface of any one of a lower surface and 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 cathode ray tube is arranged at a position lower than the display screen portion, a concave groove portion that allows a part of the outer peripheral edge of the speaker to be fitted is provided, and when the front cover is superposed on the case body. ,
An exposure-mounted hands-free TV intercom unit, characterized in that both sides of the outer peripheral edge of the speaker are fitted and held in the concave groove portions of both the case body and the front cover. 2. An exposure mounting in which a microphone and a speaker for intercom communication and a flat cathode ray tube for displaying a monitor image are housed in a unit case formed of a case body and a front cover thereof. A hands-free television intercom unit of the type, wherein the speaker is faced to a wall surface of any one of a lower surface and left and right side surfaces of the case body and the front cover in each of the case body and the front cover. A supporting claw is provided to support a part of the outer peripheral edge of the speaker when the flat type cathode ray tube is arranged at a position lower than the display screen portion, and when a front cover is superposed on the case body. ,
An exposure-mounted hands-free TV intercom unit, characterized in that both sides of the outer peripheral edge of the speaker are supported by support claws of both the case body and the front cover. 3. A flat-type cathode ray tube for displaying a monitor image in a unit case formed by a case body and a front cover thereof, and image control of the monitor image displayed by the flat-type cathode ray tube. An exposed-mount type hands-free television intercom unit containing a circuit board for controlling an intercom call performed via a microphone and a speaker, wherein the circuit board includes a first circuit board and a second circuit board. The first circuit board is disposed between the flat cathode ray tube and the back surface of the case body, and the second circuit board is attached to the case body or the front cover. Is provided with a substrate holding groove for holding and standing upright in a lateral position of the flat cathode ray tube by holding the front cover on the case body,
An exposure-mounted hands-free TV intercom unit, characterized in that the second circuit board held in the board holding groove is configured to be prevented from being pulled out in the front-rear direction. 4. A flat-type cathode ray tube for displaying a monitor image in a unit case formed of a case main body and a front cover thereof, and image control of the monitor image displayed by the flat-type cathode ray tube. An exposed-mount type hands-free television intercom unit containing a circuit board for controlling an intercom call performed via a microphone and a speaker, wherein the circuit board includes a first circuit board and a second circuit board. The first circuit board is arranged between the flat cathode ray tube and the rear surface of the case body, and the first circuit board is divided into a circuit board and a second circuit board on the case body or front cover. A lateral direction of the flat-type cathode ray tube in a state where the second circuit board is prevented from being pulled out in the front-rear direction by locking the claw portion in the locking hole formed along the thickness direction. Exposed-mounted hands-free television interphone unit, characterized in that the locking pawl is provided for erecting retaining the.