JP4359555B2 - Intercom device - Google Patents

Description

  The present invention relates to an intercom device, and more particularly to an intercom device provided with a separable terminal block.

The intercom device includes an entrance cordless handset for calling a resident, and a living room base phone for responding to calls from the entrance cordless handset. In recent intercom devices, a gas leak alarm or the like is further connected to the living room base phone. There are many cases. And the apparatus connected to the living room main unit in this way is connected via a connection line for carrying out communication with the normal living room main unit.
Therefore, the living room base unit includes a power supply terminal for connecting a power supply in addition to the terminal block for connecting the connection line (see, for example, Patent Document 1). In this case, when the power supply terminal is an AC quick connection terminal that can be easily connected, a cover is separately provided on the power supply terminal in order to protect the quick connection terminal.
On the other hand, some terminal blocks provided in the entrance unit are separable from the entrance unit housing in order to facilitate connection of connection lines (see, for example, Patent Document 2).
JP 2004-129014 A Japanese Patent Laid-Open No. 2003-259012

  As described above, in the conventional intercom device, the terminal block of the living room base unit is integrally formed with the housing, so that the connection work of the connection lines from each device is troublesome. Further, when the power terminal is an AC quick connection terminal, the workability of the power cord connection is improved, but a cover is necessary from the viewpoint of safety, and the number of parts is increased.

  Therefore, in view of such a problem, the present invention makes it possible to easily connect the connection lines and power cords from each device to the parent unit, and to provide a separate cover for the AC quick connection terminal. An object is to provide a no intercom device.

In order to solve the above-mentioned problem, an invention according to claim 1 is directed to an intercom apparatus having an entrance cordless handset for a visitor to call a resident and a living room base set for responding to a call from the entrance cordless handset. , The AC quick connection terminal for connecting to the commercial power source and the detachable terminal block for connecting the connection line extending from the entrance cordless handset are provided on the rear surface of the housing of the living room main unit. Is arranged in a part covered with a terminal block.
With this configuration, the connection line can be easily connected to the living room base unit, and workability can be greatly improved. Further, it is not necessary to provide a separate protective cover for the AC quick connection terminal.

The invention according to claim 2 is the invention according to claim 1, wherein the base unit is installed so as to cover the switch box embedded in the wall surface, and the terminal block is a power cord inside the switch box. And a partition plate protruding rearward to separate the wiring from the connection line.
With this configuration, it is not necessary to separately provide a partition plate in the switch box.

The invention of claim 3 is characterized in that, in the invention of claim 2, the base portion of the partition plate is provided with a first thin portion for facilitating separation from the terminal block.
With this configuration, when the partition plate is already installed or not required, the partition plate of the terminal block can be easily removed using a nipper or the like, and there is no need to separately prepare a terminal block without the partition plate.

According to a fourth aspect of the present invention, in the invention according to the second or third aspect, the partition plate is provided with a second thin portion for changing the protrusion amount in accordance with the depth of the switch box. Features.
With this configuration, the terminal block can easily cope with switch boxes having different depths.

A fifth aspect of the present invention is the terminal block according to any one of the first to fourth aspects, wherein a guide groove for guiding a power cord connected to the AC quick connect terminal is provided on the rear surface of the housing, and the terminal block is mounted on the housing. In contrast, the power cord can be pulled out from the side.
With this configuration, the connected power cord can be smoothly pulled out from the side of the terminal block, and no stress is applied to the power cord during the terminal block mounting operation.

According to a sixth aspect of the present invention, in the invention according to any one of the first to fifth aspects, the one end of the terminal block and the housing are a latch comprising a claw piece and a claw receiver having an opening wider than the thickness of the claw piece. It has a mechanism, and after the locking mechanism is locked, the terminal block can be rotated and mounted.
With this configuration, one end can be locked and rotated, so that the mounting operation can be performed smoothly.

A seventh aspect of the invention is characterized in that, in the sixth aspect of the invention, the housing has a rotation support structure for supporting a rotation mounting operation of the terminal block.
With this configuration, the mounting by the rotation operation is promoted, so even if the fixing screw protrudes from the terminal block, the mounting operation is not disturbed. Further, when the terminal block is mounted, the operator will not be forced to slide from the side to damage the connection between the terminal block and the case internal wiring or the AC quick connection terminal.

The invention according to claim 8 is the invention according to claim 7, wherein the rotation support structure is constituted by a concave portion and a convex portion which are fitted between the terminal block and the housing.
With this configuration, a structure that supports the turning operation of the terminal block can be created in a simple shape.

  As described above, according to the present invention, it is easy to connect the connection line to the living room master unit, and it is not necessary to provide a separate protective cover for the AC quick connection terminal, so that workability can be greatly improved.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, embodiments of the invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing an example of an intercom device according to the present invention. 1 is an entrance cordless device installed at a front door to call a resident, and 2 is a room for responding to a call from the entrance cordless device 1. Master machine, 3a is an entrance door incorporating an electric lock 3, 4 is an electric lock controller for controlling the electric lock 3, 5 is a password unlocking device for unlocking the electric lock 3 at the entrance, 6 is a gas leak alarm, etc. Shows security equipment. Then, as shown in the figure, two entrance cordless handsets 1, an electric lock controller 4, and a security device 6 are connected to the living room main unit 2 through connection lines 8, respectively. The lock device 5 is connected by a connection line 8.

The basic operation of the intercom apparatus having the above configuration will be described. When the call button 1a of the front door unit 1 is pressed, a notification sound is generated in the living room base unit 2, and at the same time, a video of the visitor photographed by the camera 1b of the front door unit 1 is displayed on the monitor 2a. Then, when the response button 2b of the room master unit 2 is pressed, a call can be made between the room base unit 2 and the entrance slave unit 1, that is, between the resident and the visitor. And when accepting a visitor, the electric lock controller 4 carries out unlocking operation of the electric lock 3 by pushing the unlocking button 2c of the living room main | base station 2. FIG.
On the other hand, for the resident who has returned home, when the personal identification number preset by the home return person is input to the personal identification unlocking device 5, the electric lock controller 4 detects it and operates to unlock the electric lock 3. To do.

  FIG. 2 is a rear perspective view of the living room base unit 2. As shown in the figure, the housing 10 forming the living room base unit 2 has a rectangular bulging part 11 on the back side. The room base unit 2 is installed on the wall surface by being housed in a switch box 12 (shown in FIG. 5) embedded in the wall surface. The bulging portion 11 includes a terminal block 13 for connecting a connecting wire 8 provided from the entrance cordless handset 1 and the electric lock controller 4 and the like, and an AC quick connection terminal 14 (shown in FIG. 3) for connecting a commercial power source. The terminal block 13 is removable.

FIG. 3 shows a state in which the terminal block 13 is separated, and the terminal block 13 is formed so as to cut out the upper portion of the bulging portion 11 as shown in FIG. ing. Further, the AC quick connection terminal 14 is arranged in a notch 16 where the terminal block 13 is mounted, and the upper part of the AC quick connection terminal 14 is closed by mounting the terminal block 13. Further, FIG. 4 shows an enlarged view of the terminal block 13. However, a state where the quick connection terminal 15 is removed is shown, and 13a is a quick connection terminal mounting hole. The terminal block 13 is formed in a substantially rectangular shape, and the lower part of the four side parts that contacts the bulging part back surface 11a is opened, and the other side part has a side plate and is notched when mounted on the housing 10. 16 is formed to close.
A pair of claw pieces 18 that are engaged with the bulging portion back surface 11a project from the opened lower portion, and a notch end portion of the bulging portion back surface 11a corresponding to the claw piece 18 has a claw piece. A claw receiver 19 for inserting and locking 18 is formed to constitute a locking mechanism. The claw receiver 19 has a sufficiently wide opening with respect to the thickness of the claw piece 18 so that the claw piece 18 can be inserted at an oblique angle from the rear of the housing.

On the other hand, a screw insertion hole 20 for screwing the housing 10 is formed on the upper side surface of the terminal block 13, and a screw hole 22 is formed in the cutout frame portion 11 b of the corresponding housing 10. Further, a pair of trapezoidal recesses 23a that engage with the cutout frame portion 11b of the housing 10 are formed on the back of the left and right side surfaces of the terminal block 13, and a trapezoidal shape is formed on the left and right sides of the corresponding cutout frame portion 11b. A pair of convex portions 23b is formed. The concave portion 23a and the convex portion 23b are formed so as to mesh with each other only when the terminal block 13 is mounted. For this reason, the terminal blocks 13 are not engaged with each other, and the terminal block 13 is provided so that it cannot be slid on the cutout frame portion 11b.
The screw insertion hole 20 is partially threaded and formed to hold the inserted screw 21.

  Furthermore, a partition plate 24 is provided on the front surface of the terminal block 13 in the housing rear direction so as to project the interior space of the switch box 12 that accommodates the bulging portion 11 vertically. An opening 26a is formed in a slit shape at the rising portion of the partition plate 24 to provide a first thin portion, and a groove 26b is formed at an intermediate portion to provide a second thin portion. ing. The partition plate 24 is formed so that it can be easily cut by a nipper or the like at this thin portion.

  On the other hand, on the back surface of the bulging portion 11 adjacent to the terminal block 13, a guide groove 27 that guides the power cord connected to the AC quick connection terminal 14 is recessed toward the AC quick connection terminal 14. The power cord connected to the AC quick connection terminal 14 provided inside can be pulled out from the side (downward) of the terminal block 13 onto the bulging portion back surface 11a.

The attachment / detachment operation of the terminal block 13 formed in this way and the connection operation of the connection line 8 and the power cord are performed as follows. First, the terminal block 13 is separated from the housing 10, and the screw 21 is inserted into the screw insertion hole 20. In this state, the connection line 8 connected to the device is connected. The connecting wire 8 is arranged in the wall from each device, pulled out from the switch box 12, and easily connected by simply inserting the internal core wire into the quick connection terminal 15 provided on the terminal block 13.
Similarly, a power cord drawn from the switch box 12 is connected to an AC quick connection terminal 14 provided in the bulging portion 11. In this case, the connection can be easily made by simply inserting the inner core wire.

After the connection line 8 and the power cord are connected, the terminal block 13 is attached to the notch 16 of the housing 10. First, the claw piece 18 of the terminal block 13 is inserted into the claw receptacle 19 on the housing side and one end is locked. This operation cannot be performed by sliding operation from above because the concave portion 23a and the convex portion 23b are provided, and the insertion operation is performed obliquely from the rear, and after the insertion, the concave portion 23a and the convex portion 23b are rotated. Make sure to fit them together. At this time, the connected power cord engages with the end portion of the terminal block 13, but the power cord is bent from the upper side by the operation of mounting the terminal block 13 obliquely from behind, and is bent. Is guided to the guide groove 27. As described above, the concave portion 23 a and the convex portion 23 b serve as a rotation support mechanism that supports the rotation operation of the terminal block 13.
When the terminal block 13 is thus aligned with the notch 16, the screws 21 provided on the terminal block 13 are screwed to complete the mounting of the terminal block 13. At this time, the AC terminal 14 is covered and protected by the terminal block 13 by the attached terminal block 13.

FIG. 5 shows a side explanatory view of the state in which the bulging portion 11 thus attached with the terminal block 13 is accommodated in the switch box and the housing 10 is attached to the wall surface. In FIG. 5, 12 is a switch box, 29 is a power cord, and the switch box 12 is shown in cross section. Thus, the bulging part 11 is inserted into the switch box 12 and the living room base unit 2 is attached to the wall surface.
Further, at this time, the partition box 24 formed on the terminal block 13 separates the inside of the switch box 12 into an installation space for the power cord 29 and an installation space for the connection wires 8 so that both are in contact with each other in the switch box 12. There is nothing.
In addition, when a separate partition plate is installed in the switch box 12 in advance, the partition plate 24 of the terminal block 13 is not necessary, and the installer can separate it using a tool such as a nipper. In this case, the opening 26a provided between the partition plate 24 and the terminal block 13 may be cut and easily separated. Further, when the switch box 12 has a shallow structure, it can be shortened by cutting along the groove 26b of the partition plate 24 having a two-stage structure, and can be easily handled. There is no need to prepare a short terminal block separately.

Thus, by providing a detachable terminal block in the room master unit, connection lines can be easily connected, and workability can be greatly improved. In addition, since the terminal block covers the AC quick connect terminal, it is not necessary to provide a separate protective cover for the AC quick connect terminal, and the AC quick connect terminal and the terminal block are arranged close to each other, so that the circuit board in the housing is made small. It is also possible.
In addition, the guide groove allows the connected power cord to be smoothly pulled out from the side of the terminal block, so that no stress is applied to the power cord during the terminal block mounting operation, and a partition plate is provided on the terminal block. Therefore, it is not necessary to separately provide a partition plate in the switch box.
Furthermore, since the rotation support structure is provided, the installation of the terminal block by the rotation operation is promoted, so even if a screw for fixing the terminal block protrudes from the terminal block, it may interfere with the installation operation. Absent. Further, when the terminal block is mounted, the operator does not forcibly slide from above to damage the connection portion between the terminal block and the case internal wiring and the AC quick connection terminal.
In addition, by forming the rotation support structure with recesses and protrusions, it can be made with a simple shape, and by making the protrusions and recesses, the terminal block that has been mounted is prevented from moving upward after mounting. Easy to work because it works to hold the table.

In the above embodiment, the bulging part provided on the back of the housing is formed in a vertically long shape and the terminal block is disposed on the upper part. However, the shape of the bulging part is changed depending on the size of the switch box used. Alternatively, the terminal block may be provided below the bulging portion or on the left and right sides.
In addition, the power supply cord is drawn out by providing a guide groove on the rear surface of the housing, but conversely, even if a guide projection for drawing out the power supply cord is provided on the terminal block, it is effective to pull out the power cord satisfactorily.
In addition, the rotation support structure is formed by providing a protrusion on the housing and a recess on the terminal block, but the recesses and protrusions may be reversed.

It is a block diagram which shows an example of embodiment of the intercom apparatus which concerns on this invention. It is a back perspective view of the living room main | base station of FIG. The state which removed the terminal block in FIG. 2 is shown. It is an enlarged view of a terminal block. It is sectional explanatory drawing which shows the state which attached the living room main | base station to the wall surface.

Explanation of symbols

1 .... Entrance cordless handset, 2 .... Living room master, 8 .... Connection line, 10 .... Housing, 11 .... Inflated part, 12 .... Switch box, 13 .... Terminal block, 14 .... AC quick connection Terminals 15 ··· Immediate connection terminals 16 ··· Notches 18 · · Claw pieces 19 · · Claw holders 23a · · · Recesses · 23b · · · convex portions 24 · · · Partition plates 26a · · · openings (First thin portion), 26b... Groove (second thin portion), 27... Guide groove, 29.

Claims (8)

In an intercom apparatus having an entrance cordless handset for a visitor to call a resident and an in-home base set for responding to a call from the entrance cordless handset,
An AC quick connection terminal for connecting to a commercial power source and a detachable terminal block for connecting a connection line extending from the entrance handset are provided on the rear surface of the housing of the living room master unit, and the AC quick connection An intercom apparatus characterized in that a terminal is arranged at a portion covered with the terminal block. The living room base unit is installed so as to cover a switch box embedded in a wall surface,
The intercom apparatus according to claim 1, wherein the terminal block has a partition plate projecting rearward to separate the wiring between the power cord and the connection line inside the switch box. The intercom apparatus according to claim 2, wherein a base portion of the partition plate is provided with a first thin portion for facilitating separation from the terminal block. The interphone device according to claim 2 or 3, wherein the partition plate is provided with a second thin portion for changing a protruding amount in accordance with a depth of the switch box. 2. A guide groove for guiding a power cord connected to the AC quick connect terminal is provided on the rear surface of the housing, and the power cord can be pulled out from the side of the terminal block attached to the housing. The intercom apparatus in any one of thru | or 4. The one end of the terminal block and the housing have a locking mechanism comprising a claw piece and a claw receiver having an opening wider than the thickness of the claw piece, and after locking the locking mechanism, the terminal block The intercom apparatus according to any one of claims 1 to 5, wherein a mounting operation can be performed by rotating the switch. The interphone apparatus according to claim 6, wherein the housing has a rotation support structure that supports a rotation mounting operation of the terminal block. The intercom apparatus according to claim 7, wherein the rotation support structure includes a concave portion and a convex portion that are fitted between the terminal block and the housing.

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