JP2007028541A - Intercom device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an intercom device wherein a projected amount of a decoration plate from a wall face can comparatively be decreased. <P>SOLUTION: A unit body 1 is fixed to a switch box SB by using fitting screws in a form that the rear part of the unit body 1 is contained in the switch box SB for a recessed type wiring fixture. The unit body 1 comprises a box shaped body with an opening in its front side and a cover 3 to be covered on the front face of the body 2. The body 2 includes fitting plates 10 each being extended in directions apart from each other from the circumferential edge of the opening. Each fitting plate 10 is formed with box holes 11 to which a fitting screw is inserted, and with plate holes 13 for fixing the decoration plate P of a recessed type wiring fixture. The cover 3 is covered on the body 2 by overlapping a superposition piece 14 on part of the fitting plates 10 at a base side so that the cover 3 is contained in a window hole Ph opened to the decoration plate P in a way that the height of the front end face from the wall face Ws is flush with the height of the circumferential edge of the window hole Ph of the decoration plate P from the wall face Ws. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an intercom apparatus that is attached to a wall surface and can communicate with a slave unit.

  Conventionally, as this type of intercom device, a mounting bracket is fixed to a wall surface, a latching claw provided on the mounting bracket is engaged with a latching hole provided on the rear surface of the instrument body, and an instrument using a mounting screw What is attached to a wall surface by fixing to a mounting bracket is provided (for example, refer patent document 1). Since this intercom device exposes the entire body from the wall surface, the amount of protrusion of the body from the wall surface is relatively large and does not look good.

  On the other hand, in order to keep the amount of protrusion of the container from the wall surface small, an embedded intercom device is known that is attached in a form in which the rear part of the container is embedded in the wall surface (for example, Patent Documents). 2). As shown in FIG. 13, the intercom device body 1 is composed of a body 2 formed in a box shape having an opening on the front surface, and a cover 3 covered on the front surface of the body 2. A holding frame 54 that abuts is provided around the opening of the body 2.

Furthermore, in the embedded intercom device, in order to provide a uniform appearance with other embedded wiring devices and to reduce the cost of members used for mounting, the embedded interphone device is widely used. It is considered that it can be mounted on a wall surface using a switch box for a type of wiring apparatus. That is, the interphone device is fixed to the switch box using a mounting screw that is screwed into a screw hole provided in the switch box so that the rear portion of the interphone device body is housed in the switch box. Here, in the intercom device disclosed in Patent Document 2, if the mounting screw box hole is provided in the holding frame 54, the body 1 can be directly fixed to the switch box, so that the embedded wiring apparatus is fixed to the switch box. This eliminates the need for a mounting frame used for this purpose.
Japanese Utility Model Publication No. 5-38596 (pages 7-8) JP 2003-69681 A (page 3, FIG. 1)

  By the way, when the embedded wiring device is attached to the wall surface using the switch box, the decorative plate for the embedded wiring device formed in a frame shape is fixed to the mounting frame, thereby fixing the mounting frame. It is common to cover the front.

  However, in the intercom device described in Patent Document 2, since the cover 3 is covered over the entire front surface of the body 2 including the holding frame 54, the interphone device can be attached to the switch box. The decorative plate is attached to the cover 3. When the decorative plate is attached to the cover 3, the cover 3 and the decorative plate overlap in the front-rear direction with respect to the holding frame 54, so that the amount of protrusion of the decorative plate from the wall surface becomes relatively large and the appearance deteriorates.

  The present invention has been made in view of the above-described reasons, and an object thereof is to provide an intercom apparatus that can make the amount of protrusion of a decorative plate from a wall surface relatively small.

The invention of claim 1 is an intercom device that is attached to a wall surface and is capable of making a call with a slave unit, wherein the rear part is housed in a switch box for an embedded wiring device installed in the wall. And a body that is fixed to the switch box using a mounting screw that is screwed into a screw hole provided in the switch box, and the body is formed in a box shape having an opening on the front surface. The body has a mounting plate extending in a direction away from the periphery of the opening, and the mounting plate has a box hole through which a mounting screw is inserted. And a plate hole for fixing a decorative plate for an embedded wiring device that covers the front surface of the mounting plate is formed, the cover fits in a window hole opened in the decorative plate, and the wall surface The height of the front end face from In this configuration, the overlapping piece provided on the peripheral portion is overlapped with a part of the base side of the mounting plate so as to be aligned with the height of the peripheral edge of the window hole of the decorative plate from the surface. According to the above, since the cover is covered with a part of the mounting plate so as to fit in the region surrounded by the decorative plate in the mounting plate, the decorative plate can be attached to the mounting plate without overlapping the cover. . As a result, the amount of protrusion of the decorative plate from the wall surface can be made relatively small, and the appearance is good. In addition, since the height of the front end surface of the cover from the wall surface is aligned with the height of the peripheral edge of the window hole of the decorative plate from the wall surface, the appearance is further improved. In addition, since the hole for the box and the hole for the plate are formed on the body side, the cover is not deformed when the container is fixed to the switch box or the decorative plate is fixed to the container. is there.

  According to a second aspect of the present invention, in the first aspect of the present invention, a rib extending over the entire length of the mounting plate along the peripheral edge of the opening of the body is provided at a portion overlapping the cover on the front surface of the mounting plate. The rib is formed along the periphery of the box hole around the box hole.

  According to this configuration, since the portion of the mounting plate that overlaps the cover is reinforced by the ribs and is not easily deformed, there is an advantage that a gap is hardly generated between the mounting plate and the cover. Further, since the periphery of the box hole is also reinforced by the rib, it is possible to prevent the periphery of the box hole from being deformed when the mounting screw is tightened.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the cover is a notch that is notched along the periphery of the box hole at each portion of the mounting plate corresponding to the box hole. Each of the portions is formed.

  According to this configuration, since the box hole is exposed through the notch even when the cover is covered on the body, the container can be attached to and detached from the switch box while the cover is covered on the body. The operation of attaching / detaching the container to / from the container becomes relatively easy.

  The invention of claim 4 is characterized in that in the invention of claim 3, a decorative plate is provided which covers at least the front surface of the overlap piece and the cutout portion by being attached to the overlap piece.

  According to this configuration, by attaching the decorative plate to the overlapping piece after fixing the container body to the switch box, the mounting screw is covered with the decorative plate, and the appearance of the intercom device is improved.

  According to a fifth aspect of the present invention, in the first to fourth aspects of the invention, the container is formed to have a size that can be attached to a switch box capable of connecting up to two attachment frames. Features.

  According to this configuration, when the interphone device is installed using a switch box that can connect up to three mounting frames for three, other embedded type that can be mounted using three mounting frames. The wiring device can be attached to the switch box together with the intercom device. That is, the installation is facilitated since only one hole is required in the wall surface when installing the intercom device and other wiring devices.

  According to a sixth aspect of the present invention, in the first to fifth aspects of the present invention, a signal is connected to a parent device capable of making a call with the child device, and the child device is connected via the parent device. It is configured to be able to make a call between.

  In the present invention, since the cover is covered with a part of the mounting plate so as to fit in the region surrounded by the decorative plate in the mounting plate, the decorative plate can be attached to the mounting plate without overlapping the cover. . As a result, the amount of protrusion of the decorative plate from the wall surface can be made relatively small, and the appearance is good. In addition, since the height of the front end surface of the cover from the wall surface is aligned with the height of the peripheral edge of the window hole of the decorative plate from the wall surface, the appearance is further improved. In addition, since the hole for the box and the hole for the plate are formed on the body side, the cover is not deformed when the container is fixed to the switch box or the decorative plate is fixed to the container. is there.

  In this embodiment, it is attached to the wall surface in the house, and as shown in FIG. 2, it is connected to the child machine B by connecting to the child machine B installed outside the house using the signal line Ls. The intercom apparatus that constructs an interphone system that can be used for communication is assumed to be a base unit A, and the configuration of the base unit A will be mainly described. This parent device A has a monitor, and is connected to the child device B provided with a camera (not shown) for picking up a visitor, thereby displaying an image captured by the camera of the child device B. Can do. In the interphone system of the present embodiment, the interphone device installed in a room different from the master unit A is the sub master unit C, and the sub master unit C and the master unit A are connected using the signal line Ls. Accordingly, it is possible to make an extension call between the master unit A and the sub master unit C, and to make a call between the sub master unit C and the slave unit B via the master unit A.

  In the following, the configuration of the master unit A will be described with reference to FIG. 1, with the top, bottom, left, and right in FIG. 7A showing the state in which the base unit A is attached to the wall surface Ws.

  The base unit A includes a body 1 composed of a body 2 formed in a box shape having an opening on the front surface and a cover 3 covered on the front surface of the body 2, and the base unit A or the sub base unit The speaker 4 used for the output of the ringing tone from C, the call with the handset B or the sub-master C, the microphone 5 used for the call with the handset B or the sub-base C, the LCD 6 as a monitor, and the printed circuit board A circuit block 7 on which various electrical components are mounted is housed in the container 1. Furthermore, a plurality of handles H1 to H5 for operating a plurality of switches SW1 to SW5 provided in the circuit block 7 are provided on the cover 3.

  By the way, the base unit A of this embodiment is attached to the wall surface Ws by using a switch box SB for an embedded wiring device installed in a wall. The switch box SB is formed in a box shape with a mounting window opened on the front surface. As shown in FIG. 3, the body 1 is fixed to the switch box SB on a pair of inner surfaces facing vertically. A plurality of fixture fixing projections 9 each having a screw hole 8 for a mounting screw (not shown) are provided in a protruding manner. Here, the fixture mounting protrusion 9 is provided in the mounting window of the switch box SB so that the screw hole 8 is exposed forward from the mounting window of the switch box SB. A rectangular construction hole Wh is formed in a portion of the wall material W corresponding to the switch box SB. The construction hole Wh is smaller than the mounting window of the switch box SB and is formed to have a size that exposes all the screw holes 8 provided in the fixture fixing projection 9 to the front.

  The main unit A is attached to the switch box SB from the front through the construction hole Wh, and is set to have a shape and a size capable of accommodating the rear portion of the body 1 in the switch box SB. Moreover, in this embodiment, the container 1 is formed in a size corresponding to the switch box SB capable of mounting up to three mounting frames (not shown) for one station. The single mounting frame here means three mounting frames standardized in “JIS C8375”. In the following, two single mounting frames are connected in the left-right direction. The dimension is called “for 2 stations”, and the dimension with 3 connected is called “for 3 stations”. That is, the base unit A of the present embodiment is attached to the wall surface Ws using a triple switch box SB in which three instrument fixing projections 9 are provided on each of a pair of inner surfaces facing each other in the vertical direction.

  More specifically, as shown in FIG. 4, the body 2 has a pair of mounting plates 10 that are integrally extended so as to extend away from the respective upper and lower end edges of the opening. The pair of mounting plates 10 are formed over the entire length between the left and right ends of the body 2. Each mounting plate 10 has a plurality of box holes 11 through which mounting screws are inserted (here, in the same manner as a mounting frame (not shown) used when fixing the embedded wiring apparatus to the switch box SB. And a decorative plate P, which will be described later, is provided at a portion outside the box hole 11 in the vertical direction (that is, the upper side of the upper mounting plate 10 and the lower side of the lower mounting plate 10). A plurality (three in this case) of plate holes 13 for fixing screws (not shown) for fixing to the container 1 are formed. Further, on the front side of each mounting plate 10, ribs 12 are provided upright between both ends in the left-right direction. The ribs 12 surround each box hole 11 except for one end on the outer side in the vertical direction, and are formed in a shape in which those formed around the box holes 11 arranged in the left-right direction are connected to each other. Has been. The plate hole 13 is disposed outside the rib 12 in the vertical direction.

  Then, the body 2 uses the mounting screw so that the rear part is housed in the switch box SB installed in the wall in the same manner as the embedded wiring device attached to the wall surface Ws using the switch box SB. It is attached to the wall surface Ws by being fixed to the box SB. Here, the rib 12 formed around the box hole 11 reinforces the periphery of the box hole 11 so as to suppress deformation of the body 2 when the mounting screw is tightened. Here, among the three fixture fixing projections 9 provided at the upper and lower ends of the mounting window of the switch box SB, the screw holes 8 in the fixture fixing projections 9 at the left and right ends are used.

  On the other hand, the cover 3 is attached to the front side of the frame 16 so as to cover the frame 16 through which the display window 15 that exposes the display surface (front surface) of the LCD 6 is forward and the display window 15 of the frame 16. And a protective plate 17 to be worn. The protective plate 17 is made of polycarbonate resin, and a portion corresponding to the display window 15 is formed transparent. As shown in FIG. 6A, the frame 16 has a display window 15 at a position on the left side, and a speaker mounting portion 20 in which a large number of small speaker holes 19 are formed on the right side of the display window 15. An operation window 21 and a handle holding portion 22 which will be described later are formed. Further, in the frame 16, a small microphone hole 23 is formed on the lower left side of the display window 15, and an operation that opens in a rectangular shape extending in the left-right direction to the right of the small microphone hole 23, that is, below the display window 15. A window 24 is formed. Parts of the protective plate 17 corresponding to the microphone small hole 23 and the operation window 24 are cut out. Overlapping pieces 14 are respectively provided above and below the portion of the frame 16 where the protective plate 17 is covered. Each overlapping piece 14 is formed over the entire length between the left and right ends of the frame body 16, and is an engagement claw provided on a pair of decorative plates 18 attached to the front side of the frame body 16 so as to cover the overlapping piece 14. A plurality (three in this case) of engagement holes 25 that engage with (not shown) are formed.

  The body 2 and the cover 3 engage the coupling claws 26 projecting rearward from the left and right end portions of the frame 16 with the coupling holes 27 provided at the front end portions of the left and right side walls of the body 2 and facing each other. Are combined. Here, the frame body 16 is dimensioned so that the upper and lower end edges of the mounting plate 10 face each other in the front-rear direction with respect to the ribs 12 of each mounting plate 10. The notches 28 are formed in accordance with the shape of the ribs 12 formed around each box hole 11. In other words, the portion of the body 2 that is covered by the frame body 16 is limited between the ribs 12, and the frame body 16 has the overlapping pieces 14 provided at the upper and lower end portions on the base side of each mounting plate 10. It will be covered with a part of. The box hole 11 and the plate hole 13 are exposed forward even when the frame 16 is attached to the body 2. However, in the state where the decorative plate 18 is attached to the frame body 16, the box hole 11 is covered with the decorative plate 18.

  Handles H1 to H5 provided on the cover 3 are disposed in a pair of handles H1 and H2 disposed in an operation window 24 opened below the display window 15 and an operation window 21 opened below the speaker mounting portion. There are a pair of handles H3 and H4 and a handle H5 held by a handle holding part 22 formed below the operation window 21.

  A pair of handles H1 and H2 arranged in the operation window 24 are juxtaposed in the left-right direction and correspond to the brightness adjustment and volume adjustment switches SW1 and SW2 provided in the circuit block 7, respectively. . The handles H1 and H2 are elastically held by leaf springs 29 fixed to the body 1 respectively. Therefore, the switches SW1 and SW2 for brightness adjustment and volume adjustment can be operated by pushing the handles H1 and H2 backward while bending the leaf spring 29, respectively. The brightness adjustment switch SW1 is for adjusting the brightness of the image displayed on the LCD 6, and the volume adjustment switch SW2 is for adjusting the volume during a call. Thus, when the brightness adjustment switch SW1 is provided around the LCD 6, the user can easily understand that the brightness adjustment switch SW1 is for setting the LCD 6. There is an advantage.

  However, when the switch SW1 is arranged around the LCD 6 as described above, it is necessary to secure a space for arranging the switch SW1 around the LCD 6 in the container 1. Therefore, in the present embodiment, as shown in FIG. 4, a space formed between the body 2 and the cover 3 by recessing the housing recess 30 in a portion of each mounting plate 10 that faces the cover 3. The storage recess 30 is widened, and the switch SW1 is disposed in the storage recess 30 (see FIG. 7B). That is, the portion where the switch SW <b> 1 is mounted on the printed board is disposed in the storage recess 30. Here, the storage recesses 30 are respectively formed at positions corresponding to between the pair of appliance fixing protrusions 9 adjacent to each other in the left-right direction of the switch box SB. Thereby, the clearance gap produced between a pair of instrument fixing protrusion 9 adjacent in the left-right direction between the body 2 and switch box SB can be used effectively. In short, according to the configuration of the present embodiment, it is possible to secure a space around the LCD 6 without reducing the size of the LCD 6 while maintaining the size of the container 1 that can be attached to the switch box SB. The switch SW1 can be provided around the LCD 6 without reducing the size.

  Further, a pair of handles H3 and H4 arranged in the other operation window 21 are juxtaposed in the left-right direction, each for a take-up function (details will be described later) provided in the circuit block 7 and an extension. This corresponds to each of the switches SW3 and SW4 for calling. The pair of handles H3 and H4 are integrally formed by connecting the upper ends thereof, but individually operating the switches SW3 and SW4 by flexing backward. Furthermore, the handle H5 held by the handle holding unit 22 corresponds to the call switch SW5 provided in the circuit block 7. The handle H5 is a so-called piano handle, and is provided on the front side of the handle holding portion 22 as shown in FIG. 5A with respect to a bearing (not shown) provided at the upper end of the rear surface. By fitting the pair of holding projections 31, the handle holding portion 22 is pivotally attached. Then, by inserting and engaging a retaining claw (not shown) provided at the lower end portion of the rear surface of the handle H5 into the pair of retaining holes 32 provided in the handle holding portion 22, the handle H5 is removed. A stop is made. The frame 16 is interposed between the handle H5 and the call switch SW5. The position corresponding to the call switch SW5 in the frame 16 is a flexible piece 33 having flexibility. By pushing H5 backward, the call switch SW5 can be operated through the flexible piece 33.

  By the way, in a state where the base unit A is simply attached to the switch box SB, a gap is generated between the base unit A and the wall material W in the construction hole Wh as shown in FIG. Therefore, as shown in FIG. 7A, a decorative plate P for an embedded wiring device that covers the front surface of the mounting plate 10 is attached to the parent device A. The decorative plate P includes a frame-shaped plate frame P1 that surrounds the periphery of the front surface of the cover 3, and a decorative cover P2 that covers a gap between the cover 3 and the plate frame P1. The plate frame P1 is fixed by screwing a fixing screw into the plate hole 13 provided in the mounting plate 10, and the decorative cover P2 is provided with a locking claw (not shown) protruding from the rear surface. The plate is attached to the plate frame P1 by engaging with a locking hole (not shown). Thereby, the construction hole Wh is blocked by the master A and the decorative plate P. Note that the decorative plate P used here is for triple use, and a square shape with corners formed at right angles in a plan view as shown in FIG. 8A and a corner part as shown in FIG. 8B. Is selected from a round shape formed in an arc shape. The decorative plate P has a rectangular window hole Ph, and the vertical dimension L1 of the decorative plate P is set to 120 mm, and the horizontal dimension L2 is set to 162 mm.

  Here, in this embodiment, the cover 3 is covered so that it may fit in the window hole Ph of the decorative plate P. That is, in the mounting plate 10, the portion to which the cover 3 is attached and the portion to which the decorative plate P is attached are separated by the rib 12, and the cover 3 and the decorative plate P do not overlap in the front-rear direction. In the present embodiment, as shown in FIG. 9, the wall surface Ws is set so that the height of the front edge of the cover 3 from the wall surface Ws is aligned with the height of the peripheral edge of the window hole Ph of the decorative plate P from the wall surface Ws. The amount of protrusion of the container 1 from is set. Specifically, the deviation in the front-rear direction between the front end surface of the cover 3 and the peripheral edge of the window hole Ph on the front surface of the decorative cover P2 is accommodated within 2 mm. Further, the frame 16 is formed in a shape in which portions other than the speaker mounting portion 20 are retracted from the speaker mounting portion 20, and the cover 3 is attached with the protective plate 17, the decorative plate 18, and the handles H3 to H5 attached. The front end surfaces of the whole, the decorative plate 18 and the handles H3 to H5 are substantially flush with each other. However, in the handles H1 and H2 for adjusting the brightness and the volume, the area of the operation surface (front end surface) is smaller than that of the other handles H3 to H5, so that it is easy to operate from the front end surface of the cover 3 It is formed in a protruding dimension.

  Next, the structure in the container 1 will be described. In the container 1, the speaker 4 and the microphone 5 as well as the LCD 6 and the circuit block 7 are accommodated as described above. The circuit block 7 includes three printed boards (a detection system board 34, a power supply system board 35, and a processing system board 36). The three printed boards are arranged on the detection system board 34 from the rear wall side of the body 2. The power supply system substrate 35 and the processing system substrate 36 are arranged in this order.

  The detection system board 34 is provided with a slave unit call detection circuit 54 (see FIG. 12) for detecting a call from the slave unit B, and the like, as shown in FIG. A signal terminal portion 38 that is exposed rearward from the signal terminal arrangement hole 37 (see FIG. 4) provided therethrough is mounted. Each signal line Ls connected to each of the slave unit B and the secondary master unit C is connected to the signal terminal unit 38. However, when a function other than communication with the slave unit B or the sub master unit C (for example, locking / unlocking of the electric lock) is added to the master unit A, the signal terminal unit 38 is used to realize these functions. Used as a necessary input / output unit. That is, a signal line other than the signal line Ls connected to the slave unit B and the secondary master unit C can be connected to the signal terminal unit 38. In the present embodiment, the signal terminal portion 38 can connect a maximum of 10 signal lines Ls, and each signal line Ls is released from being held in the vicinity of the wire insertion hole 39 into which each signal line Ls is inserted. A release button 40 is provided.

  The power supply circuit board 35 is provided with a power supply circuit 56 (see FIG. 12) and the like, and a power supply terminal portion exposed rearward from a power supply terminal arrangement hole 41 (see FIG. 4) penetrating the rear wall of the body 2. 42 is mounted. A power line Lp (see FIG. 12) for supplying power to the main unit A is connected to the power terminal 42. The power supply terminal portion 42 shown in the figure is a so-called quick connection terminal, and electrical connection and mechanical holding are completed simultaneously by inserting the power supply line Lp.

  The processing substrate 36 is provided with an operation circuit 64 (see FIG. 12) having the above-described switches SW1 to SW5, and the LCD 6 is also mounted. Specifically, the LCD 6 is held on the processing system substrate 36 by fixing the shield plate 43 to the processing system substrate 36 while being held by the shield plate 43 that protects the LCD 6. The shield plate 43 includes a plurality of spring pieces 44 each projecting laterally from the outer peripheral edge and having a front end portion extending forward, and a plurality of elastic contact pieces each formed by cutting and raising a part of the plate surface. 45, the front ends of the spring pieces 44 are brought into contact with the outer peripheral surface of the LCD 6, and the elastic contact pieces 45 are brought into contact with the rear surface of the LCD 6 to elastically hold the LCD 6. Accordingly, the LCD 6 is held in such a manner that the peripheral portion of the front surface is brought into contact with the periphery of the display window 15 on the rear surface of the frame body 16. For example, a member having rubber elasticity may be interposed between the periphery of the front surface of the LCD 6 and the periphery of the display window 15 on the rear surface of the frame body 16. The switches SW1 to SW5 are mounted at positions corresponding to the handles H1 to H5 described above.

  Here, the detection system board 34 and the power supply system board 35 are fixed to the body 2 using screws (not shown). For this reason, a plurality of body-side bosses 46 (see FIG. 4) are formed on the front surface of the rear wall of the body 2 so that screw holes for fixing the detection system board 34 and the power supply system board 35 are formed. On the other hand, the processing system substrate 36 is fixed to the cover 3 using screws (not shown). Therefore, a plurality of (here, two) cover-side bosses 47 (see FIG. 5B) each having screw holes for fixing the processing system substrate 36 are formed below the operation window 15 on the rear surface of the frame body 16. ) Is provided. Further, a holding claw 48 (see FIG. 7C) protruding rearward is provided on the left side of the display window 15 on the rear surface of the frame body 16, and the holding claw 48 engages with the left end edge of the processing system substrate 36. As a result, the left end portion of the processing system substrate 36 is also held by the frame body 16.

  By the way, since the mounting plate 10 of the body 2 and the switch box SB are separated by at least the thickness dimension of the wall material W, the mounting plate 10 reduces the distance from the switch box SB when the mounting screw is tightened. The body 2 may be deformed by bending. However, in the present embodiment, since the processing system substrate 36 is fixed to the cover 3, even if the body 2 is deformed, the handles H1 to H5 provided on the cover 3 and the processing system substrate 36 are provided. The relative positions of the provided switches SW1 to SW5 do not change. That is, the relative positions of the handles H1 to H5 and the switches SW1 to SW5 are not shifted, so that the operation of the switches SW1 to SW5 is not hindered. In the present embodiment, the LCD 6 held on the processing system substrate 36 is also fixed to the cover 3, so that even if the body 2 is deformed, the LCD 6 does not tilt with respect to the cover 3. That is, there is no unnecessary gap between the cover 3 and the LCD 6, and it is possible to prevent the occurrence of a problem that the appearance of the main unit A is deteriorated due to the gap or that dust enters the gap. .

  Further, a plurality (four in this case) of speaker fixing bosses 49 (refer to FIG. 5B) each having a speaker fixing screw hole 34 formed on the rear surface of the speaker mounting portion 20 in the frame 16. The speaker 4 is fixed to the cover 3 using screws (not shown). A projecting piece 50 (see FIG. 5B) is erected on the rear surface of the frame 16 around the microphone hole 23 in accordance with the outer peripheral shape of the microphone 5. Arranged at the enclosed position.

  Further, when installing the parent device A, it is necessary to connect the signal line Ls and the power supply line Lp to the parent device A. The signal line Ls and the power supply line Lp connected to the base unit A are drawn into the switch box SB through the wall and connected to the signal terminal unit 38 and the power supply terminal unit 42 described above in the switch box SB. Become. Here, it is obliged to isolate the space for storing the power supply line Lp and the space for storing the signal line Ls in the switch box SB so that the power supply line Lp which is a strong power and the signal line Ls which is a low power are not mixed. It has been. Therefore, as shown in FIG. 10, a plate-like insulating separator F that divides the space in the switch box SB into two by being attached to the switch box SB is used.

  In the present embodiment, as shown in FIG. 11, the front end portion of the insulating separator F is fitted at a position between the power terminal portion 42 and the signal terminal portion 38 on the rear surface of the body 2 in the main unit A. A positioning groove 53 is formed. Since the insulating separator F is disposed along the vertical direction, the positioning groove 53 is formed over the entire length between the upper and lower ends of the rear surface of the body 2. Thereby, in the state which fixed base unit A to switch box SB, the front-end part of the insulation separator F will fit in the positioning groove 53 provided in the rear surface of the container 1 (refer FIG.7 (c)). There is no gap between the rear surface of the container 1 and the front edge of the insulating separator F. Therefore, the space for storing the power supply line Lp and the space for storing the signal line Ls are reliably separated. Further, when the base unit A is installed, if the insulating separator F is attached to an incorrect position other than the position corresponding to the positioning groove 53 in the switch box SB, the front edge of the insulating separator F is the rear surface of the container 1. Since the main unit A cannot be fixed to the switch box SB by contacting the main unit A, there is an advantage that there is no construction mistake that causes the main unit A to be installed in a state where the insulating separator F is attached at an incorrect position.

  Next, a schematic configuration of the above-described circuit block 7 will be described with reference to FIG. In the detection system board 34, a slave unit call detection circuit 54 that detects a call from the slave unit B based on the line voltage of the signal line Ls, and a recall from the slave unit B based on the line voltage of the signal line Ls. A slave unit recall detection circuit 55 for detection is provided. On the other hand, the power supply system board 35 is provided with a power supply circuit 56 that is connected to the power supply line Lp and supplies power to each circuit, and a slave unit power supply circuit 57 that supplies power to the slave unit B. In the processing system board 36, the speaker amplifier 58 that amplifies the output signal to the speaker 4, the microphone amplifier 59 that amplifies the input signal from the microphone 5, the transmission signal collected by the microphone 5, and the handset B Is provided with a call switching circuit 60 for switching between a transmission state and a reception state by passing a signal having a higher signal level by comparing the received signal with the received signal and realizing a half-duplex voice call (hands-free call) is doing. Further, on the processing system board 36, a demodulation circuit 61 that demodulates the video signal from the slave unit B, an LCD circuit 62 that displays an image on the LCD 6 by the video signal, a recording circuit 63 that records the video signal, An operation circuit 64 having the above-described switches SW1 to SW5 and a microcomputer 65 that receives an operation input from the operation circuit 64 are provided.

  The operation of the interphone system constructed by using the master unit A having the above-described configuration together with the sub master unit C and the slave unit B will be briefly described below.

  When the visitor calls from the slave unit B, the master unit A outputs a ringing sound from the slave unit B from the speaker 4 and displays an image captured by the camera of the slave unit B on the LCD 6. Then, when the telephone handle H5 is pressed, the parent machine A can enter a call with the child machine B. If the handle H5 for call is pushed again, the call with the handset B is terminated. Furthermore, the base unit A of the present embodiment has a take-up function for generating a predetermined sound (such as a ringing tone for a telephone call) from the handset B, and when it is desired to end the call with the handset B quickly. In this case, the pick-up function can be activated by pushing the handle H3 for the pick-up function during a call. Further, when the extension telephone handle H4 is pressed, the secondary master unit C is called from the master unit A, and thereafter, a call can be made between the master unit A and the secondary master unit B.

  By the way, the sub-master C used in this intercom system is different in size of the main body 1 from the main body A of the main body A, and is formed to have a size that can be attached to the double switch box SB. As a result, when the secondary master unit C is installed using the triple switch box SB, another embedded wiring device that can be attached using the single installation frame is connected to the switch together with the secondary master unit C. It can be attached to the box SB. Since the secondary master unit C is often installed in the vicinity of the entrance / exit in the room, for example, it is conceivable to install an illumination switch G that is also installed in the vicinity of the entrance / exit in the room together with the secondary master unit C (see FIG. 2). . In this case, since the construction hole Wh provided in the wall surface Ws at the time of installation of the lighting switch G and the secondary master machine C is only one place, the construction is facilitated, and the lighting switch G and the secondary master machine C are separately provided. There is an advantage that it looks better than when it is installed. Further, the user turns on the room lighting by operating the lighting switch G while moving the line of sight from the screen (LCD 6) of the sub master unit C while the sub master unit C is talking to the slave unit B. Can

  In addition, if a quadruple switch box SB is used to install the base unit A, another embedded wiring device that can be mounted using a single mounting frame is attached to the switch box SB together with the base unit A. Therefore, it is possible to install both the master unit A and the lighting switch G using a single switch box SB. Since the basic configuration of the secondary master unit C is the same as that of the master unit A, detailed description of the secondary master unit C is omitted.

It is a disassembled perspective view which shows the structure of embodiment of this invention. It is a schematic block diagram of the intercom system using the main | base station same as the above. It is a perspective view which shows the switch box used for the same as the above. It is a perspective view which shows a body same as the above. The same frame is shown, (a) is the perspective view seen from the front, (b) is the perspective view seen from the back. It is a perspective view which shows the main | base station same as the above. The main | base station same as the above is shown, (a) is a front view, (b) is XX sectional drawing of (a), (c) is YY sectional drawing of (a). It is a front view which shows the decorative plate used for the same as the above. The main | base station same as the above is shown, (a) is a top view, (b) is a bottom view, (c) is a side view, (d) is a rear view. It is a perspective view which shows the main | base station same as the above. It is the perspective view which looked at the main | base station same as the above from the back. It is a block diagram which shows a structure same as the above. It is a disassembled perspective view which shows a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Body 2 Body 3 Cover 8 Screw hole 10 Mounting plate 11 Box hole 12 Rib 13 Plate hole 14 Laminated piece 18 Decorative plate 28 Notch A Auxiliary machine (interphone device)
B Slave unit C Secondary master unit (interphone device)
P decorative plate Ph window hole SB switch box Ws wall surface

Claims (6)

  An intercom device that can be attached to a wall and can communicate with a slave unit, and is installed in the switch box so that the rear part is housed in a switch box for embedded wiring equipment installed in the wall. A body fixed to the switch box using a mounting screw that is screwed into the screw hole, and the body is covered with a box-shaped body having an opening on the front surface and the front surface of the body. The body has a mounting plate that extends away from the periphery of the opening, and the mounting plate has a box hole through which the mounting screw is inserted, and the mounting plate A plate hole for fixing a decorative plate for an embedded wiring device that covers the front surface is formed, the cover fits in a window hole opened in the decorative plate, and the height of the front end surface from the wall surface Make up the makeup from the wall So as to align the height of the peripheral edge of the bets window opening, intercom apparatus characterized by being Kutsugaechaku superimposed on a portion of the base side of the mounting plate overlapping piece provided on the periphery.   A rib that extends over the entire length of the mounting plate along the peripheral edge of the opening of the body is erected on a portion of the front surface of the mounting plate that overlaps the cover. 2. The intercom apparatus according to claim 1, wherein the intercom apparatus is formed along a peripheral edge of the box hole.   2. The cover according to claim 1, wherein a cutout portion is formed in each portion of the mounting plate corresponding to the box hole, the cutout portion being cut out along a peripheral edge of the box hole. 2. The intercom device according to 2.   The intercom apparatus according to claim 3, further comprising a decorative plate that is attached to the overlapping piece and covers at least a front surface of the overlapping piece and the cutout portion.   The said container body is formed in the dimension which can be attached to the switch box which can connect the attachment frame for three pieces to two pieces, The one of Claim 1 thru | or 4 characterized by the above-mentioned. Intercom device.   2. The base unit capable of making a call with a slave unit is connected using a signal line and configured to be able to make a call with the slave unit via the master unit. The intercom apparatus according to any one of claims 5 to 5.

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