JPH03129913A - Embedded line filter - Google Patents

Abstract

PURPOSE:To attache the line filter so as to be freely attachable and detachable to and from a fitting frame for a standardized wiring instrument embedded on the wall surface, etc., by containing and installing a filter for suppressing a noise on a speech line and a signal line in the standardized wiring instrument. CONSTITUTION:In an instrument body 1, a printed board 5 on which a line filter 4 constituted of a low-pass filter, etc., is mounted is provided. On the printed board 5, a terminal part 6 of an input side of the line filter 4 and a terminal part 7 of an output side are provided. As for the terminal parts 6, 7, a terminal assembly 8 is mounted on the printed board 5, and can be connected easily from the back of a body 2. On the body 2, containing parts 9, 10 for containing the line filter 4 and the terminal parts 6, 7 are provided, in the case the printed board 5 is placed. On the other hand, from both side end parts of a cover 3, an engaging piece 11 having elasticity is provided integrally, and the body 2 and the cover 3 are coupled.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an embedded line filter that suppresses noise superimposed on a telephone line, a call line of a doorbell, or a signal line. It is.

[Prior Art 1] A line filter is inserted into a telephone call line or a signal line of a doorbell or the like to suppress noise such as AM broadcasting that is superimposed on the line.

[Problems to be Solved by the Invention] Such conventional line filters are of the adapter type, and are therefore difficult to mount or cannot be mounted on standardized mounting frames for wiring devices buried in walls, etc. The problem was that there was no.

The present invention has been provided in view of the above-mentioned points, and enables embedded advance wiring by being removably attached to a mounting frame for a standardized wiring device embedded in a wall surface etc. The present invention also provides an embedded line filter for the purpose of preventing malfunctions due to noise and improving call quality.

[Means for Solving the Problems] The present invention forms a device main body that is removably attached to a standardized wiring device mounting frame embedded in a wall surface, etc., and a telephone line is installed in the device main body. The device is equipped with a line filter that suppresses noise superimposed on the call line and signal line of the doorbell and the doorbell, and the size of the device body is the same as one standardized wiring device module.

Further, in a second aspect of the present invention, the size of the device main body is twice the size of one standardized wiring device module, that is, the size of two standardized wiring device modules.

Furthermore, in claim 3, the size of the device body is three times the size of one standardized wiring device module.

[Function] With the above configuration, the device body containing the line filter is made as large as one wiring device module, and the device body is embedded in a wall surface etc. to form a standardized mounting frame for wiring devices. It can be detachably attached to.

Moreover, in claim 2, the instrument body is made into two modules in size and can be detachably attached to the attachment frame.

Furthermore, in claim 3, the instrument main body is made into three modules in size and can be detachably attached to the mounting frame.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings. FIG. 1 shows an exploded perspective view of the entire instrument body 1 and body 2.
and cover 3 constitute an outer shell. As shown in FIG. 3, a printed circuit board 5 on which a line filter 4 made of a low-pass filter or the like is mounted is provided within the instrument body 1. As shown in FIG.

This line filter 4 suppresses AM broadcast noise superimposed on telephone lines, doorbell call lines, and signal lines, and prevents malfunctions caused by noise from devices installed after the device body 1 and improves call quality. It is. Further, the printed circuit board 5 is provided with a terminal section 6 on the input side and a terminal section 7 on the output side of the line filter 4.
At 7, a terminal board 8 as shown in FIG. 2 is mounted on the printed circuit board 5. This terminal plate 8 is of a screw type using screws, and can be easily connected from the back side of the body 2. Further, the terminal portion 6.7 may have a so-called connecting terminal structure including a terminal plate, a locking spring, a release button, and the like.

The body 2 has a storage section 9.10 that stores the line filter 4 and the terminal section 6.7 when the printed circuit board 5 is arranged.
is the provision. On the other hand, elastic engagement pieces 11 are integrally provided from both ends of the cover 3, and by locking the engagement pieces 11 through the notches 12 of the body 2, the body 2 and the cover 3 can be connected. are combined. A pair of locking pieces 13 are protruded from both sides of the cover 3 for attachment to an insulating attachment frame 21 to be described later, and a recess 14 is also formed for attaching the metal attachment frame. ing.

The instrument main body 1 configured as described above is connected to a telephone line and a signal line, and these are connected on the back side of the instrument main body 1. Further, the size of the device main body 1 is the same as the size and shape of one standardized wiring device module. Further, the instrument main body 1 is constructed as an implantable type.

The mounting frame 21 made of insulating material is one of the standardized wiring devices.
It is large enough to accommodate three individual modules. One side piece of the mounting frame 21, which is buried in a wall surface, etc., is formed with a thank-you engaging part 22 that is engaged with one of the locking pieces 13 of the instrument main body 1, and the other side piece is formed with the other side piece. An elastic engagement portion 23 with which the locking piece 13 engages is formed. Also, mounting frame 2
At the top and bottom of 1, circular and oblong mounting holes 24 and 25 are formed, respectively, and screw holes 26 for mounting are formed, respectively.

Then, the device body 1 is removably attached to the mounting frame 21 as described above, and the decorative plate 27 is inserted into the insertion hole 2 from above.
It is attached by screwing into the screw hole 26 with a screw through the screw 8.

The front portion of the instrument body 1 will be exposed through the opening 29 of the decorative plate 27. FIG. 6 shows a state in which the appliance main body 1, an outlet 30, and a switch 31 are mounted on the mounting frame 21. In this case, a decorative plate having openings corresponding to the decorative plate is used.

FIG. 4 shows a circuit diagram of the line filter 4, and the transformer T
It is configured using FIG. 5 shows another embodiment of the line filter 4, in which a capacitor C3 and a resistor R1 are connected to the input side, and a similar circuit can be inserted to the output side.

Note that the circuit configuration of the line filter 4 is not limited to the illustrated circuit.

FIG. 7 shows another embodiment of the cover 3 of the instrument body 1, in which only the front portion of the cover 3 is lowered in height so that it does not protrude to the front than the decorative plate.

FIG. 8 shows another embodiment of the device main body 1, and the size of the device main body 1 has been changed to the size of two standardized wiring device modules, which is twice the size of one standardized wiring device module. This is the size of the module. In this embodiment, two sets of line filters 4 are mounted. Further, the engaging piece 11 of the cover 3 is inserted and locked into the locking portion 15 of the body 2 to couple the two.

In FIG. 9, a set of line filters 4 is used, and the structure is such that a modular telephone jack can be attached thereto. That is,
The body 2 has a storage section 16 for installing a modular jack.
The cover 3 is formed with an opening 17 corresponding to the modular jack.

FIG. 10 shows still another embodiment of the device main body 1, in which the size of the device main body is three times the size of one standardized wiring device module, that is, three This is the size of the module. The internal configuration is the same as in the previous embodiment, and one or two sets of line filters are provided. Further, in this embodiment, since the size of the module is for three, up to two sets of modular jacks can be provided. Of course, it is also possible not to provide a modular jack.

FIG. 11 shows a system diagram, in which the input side of the appliance body 1 is connected to an outside line 32 that is led into the home via a protector 31, and the output side of the appliance body 1 is connected to a main device 33 such as a home switchboard. are connected. Further, the appliance main body 1 is also connected between the door phone 34 and the door phone 34. In addition, when the appliance main body 1 is made into a module for two units, as shown in FIG. can be suppressed. FIG. 13 shows a case where a telephone 35 is directly connected to the appliance main body 1, and it is also possible to attach a telephone to one appliance main body 1 via a modular jack. still,
The appliance main body 1 of the present invention can be pre-wired to a mounting frame installed on a wall or the like in advance, and the above-described system configuration can be performed with the pre-wired appliance main body 1.

[Effects of the Invention] As described above, the present invention forms a device main body that is removably attached to a standardized wiring device mounting frame embedded in a wall surface, etc., and a telephone line is installed in the device main body. The device is equipped with a line filter that suppresses noise superimposed on the call line and signal line of the doorbell and the doorbell, and the size of the device body is the same as one standardized wiring device module. The main body of the device containing the line filter can be made as large as one wiring device module, and the device main body can be removably attached to a standardized mounting frame for wiring devices embedded in a wall surface, etc. Therefore, buried advance wiring can be performed, and the line filter has the effect of preventing malfunctions due to noise and improving communication quality.

Further, in claim 2, the size of the device main body is set to the size of two standardized wiring device modules, which is twice the size of one standardized wiring device module. As such, it can be detachably attached to the mounting frame.

Furthermore, in claim 3, the size of the device main body is set to the size of three standardized wiring device modules, which is three times the size of one standardized wiring device module, so that the device main body has the size of three modules. As such, it can be detachably attached to the mounting frame.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of an embodiment of the present invention, FIG. 2 is a perspective view of the terminal board shown above, FIG. 3 is a perspective view of the line filter shown above, and FIG. 4 is a circuit diagram of the line filter shown above. Fig. 5 is a circuit diagram of another embodiment of the same line filter as above, Fig. 6 is a front view showing a state where it is attached to the above mounting frame, Fig. 7 is a perspective view of another embodiment of the same as the above cover, FIG. 8 is an exploded perspective view of another embodiment of the same as the above, FIG. 9 is an exploded perspective view of the same as the above when a modular jack is attached, FIG. 10 is an exploded perspective view of still another embodiment of the same as the above, and FIG. Figures 1 to 13 are system configuration diagrams of the same system. 1 is a device main body, 4 is a line filter, and 21 is a mounting frame.

Claims (3)

[Claims] (1) A device body is formed that is removably attached to a standardized wiring device mounting frame buried in a wall surface, etc., and a telephone line, doorbell call line, and signal line are superimposed on the device body. What is claimed is: 1. A built-in line filter, characterized in that a line filter for suppressing incoming noise is housed therein, and the size of the main body of the device is the same as that of one standardized wiring device module. (2) The embedded line filter according to claim 1, wherein the size of the device main body is twice the size of one standardized wiring device module, that is, the size of two standardized wiring device modules. (3) The embedded line filter according to claim 1, wherein the size of the device main body is three times the size of one standardized wiring device module, or three times the size of one standardized wiring device module.