JPH02276178A - Telephone modular jack - Google Patents

Abstract

PURPOSE:To obviate the necessity of mounting an impedance element on the outside so as to facilitate the execution of works by installing a substrate, where an impedance element for circuit test is mounted, in a housing, and connecting both ends of the slumped once element to terminal blocks. CONSTITUTION:An impedance element 73 is provided so that it can inspect whether it conducts electricity when alternate currents are let flow from a station side, to test wire breaking, etc., of telephone circuits. In a printed board 71 where this impedance element 73 is mounted are provided a couple, left and right, of connection holes 74 corresponding to the conductive pattern connected to both ends of the impedance element 73. The printed board 71 is arranged in the space between both partitions walls 13, and a terminal block 4 and the printed board 71 are connected electrically through a connection plate 72 arranged along the inner periphery of a body 1. This way, the impedance element 73 for circuit test is installed in a housing A, and there is no necessity to mount it on the outside.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a telephone modular jack in which a modular insert having a contact spring for electrically contacting a modular plug is disposed within the housing.

[Conventional technology]

Conventionally, this type of telephone modular jack is
There is a housing with mounting dimensions set so that up to three wiring devices can be attached to a mounting frame standardized for three wiring devices. Currently, in this type of telephone modular jack, an impedance element for line testing consisting of a composite component of a capacitor and a resistor is attached externally.

[Problem to be solved by the invention]

According to the above-mentioned conventional structure, since the impedance element is attached after constructing the telephone modular jack, there is a problem that the construction work becomes troublesome. The present invention aims to solve the above-mentioned problems, and provides a telephone modular jack that is easy to install by providing an impedance element for line testing inside the housing.

[Means to solve the problem]

In order to achieve the above object, the present invention includes a board on which an impedance element for line testing is mounted is housed in a housing, and both ends of the impedance element are connected to a terminal block.

[Effect]

According to the above configuration, since the impedance element is housed in the housing, there is no need to attach the impedance element externally, and the construction work becomes easier.

【Example】

As shown in Figures 1 to 3, a body 1 and a cover 2
The housing A is composed of a modular insert 3, a terminal block 4, an inner frame, a door block 6, and a circuit block 7, which are each housed in the housing A. The housing 1 is made of an insulating material such as synthetic resin, and is designed so that up to three pieces can be attached to a ready-made mounting frame for three pieces, which is standardized for wiring devices by the Japan Wiring Appliances Industry Association. Installation dimensions are set. The body 1 is open at the top, and outer flange pieces 11 extend from the left and right edges of the opening, and retaining holes 12 are formed at the tips of the outer flange pieces 11, respectively, passing vertically through the body 1. On the other hand, outer flange pieces 22 are provided at both left and right ends of the cover 2 to face the outer flange pieces 11 of the body 1, and each outer flange piece 22 has a hook 23 at its lower end. Engagement piece 24
extends downward, and as shown in FIG. 6, the body 1 and the cover 2 are coupled by engaging the hook 23 of the engagement piece 24 with the engagement hole 12. . The engagement piece 24 has a temporary engagement protrusion 25 protruding below the hook 23, and the cover 2 is placed on the body 1 and the temporary engagement protrusion 25 is inserted into the engagement hole 12. By this, after supplying the cover 2 on the production line, the cover 2 is transferred to the body 1.
The position of the cover 2 relative to the body 1 is stabilized until the cover 2 is pressed against the body 1 to be coupled, thereby preventing the cover 2 from shifting or tilting relative to the body 1. With this configuration, the supply of the cover 2 and its connection to the body 1 can be automated, leading to improved productivity. The interior of the body 1 is divided into three compartments on the left and right by a pair of partition walls 13, and each compartment on both the left and right sides is further divided into three compartments in the front and back, so that the terminals are large enough to accommodate one terminal block 3 each. Six storage chambers 14 are formed. As shown in FIG. 8, on the top surface of the partition wall 13,
A partition wall 13 is provided at a portion corresponding to each terminal storage chamber 14.
A groove 13a is formed in the receiver that passes through the receiver, and a slit 13b facing the upper edge of the partition wall 13 is formed in a portion of the receiver corresponding to the groove 13a. Furthermore, a positioning projection 15 is provided within the section between both partition walls 13 to protrude from the inner bottom surface of the body 1 . The positioning protrusion 15 is formed at approximately the center of the body 1 in the left-right direction and at a position offset from the center in the front-rear direction. That is, if the positioning protrusion 15 were not present, the body 1 would be approximately linearly symmetrical in the front, rear, left, and right directions, but due to the presence of the positioning protrusion 15, the body 1 would be asymmetrical in the front and rear directions. This allows for easy detection. A plug insertion opening 21 is opened in the center of the top surface of the cover 2 . A pair of coupling claws 26 are provided on the tip edges of the left and right outer flange pieces 22 of the cover 2, and a coupling hole is provided at the base of each outer flange piece 22 at a location corresponding to the center of both coupling claws 26. 27 is formed. As shown in FIG. 3, a pair of left and right pressing protrusions 28 are provided on the inside of the cover 2 so as to project downward from the cover 2. Furthermore, a pair of left and right guide ribs 29 are provided protruding from the lower surface of the opening periphery of the plug insertion port 21 . At the lower end of each guide rib 29, holding protrusions 29a are provided that protrude toward each other and hold the door block 6. The modular insert 3 includes a plurality of contact springs 31 and lead pieces 32 integrally connected to each contact spring 31 by punching an elastic sheet metal, and as shown in FIG. 7, made of an insulating material. Aruki plastic jack body 3
3 by insert molding. The jack main body 33 includes a base 33a formed in a substantially U-shape and having a pair of legs substantially parallel to the partition wall 13;
It has a protrusion 33b protruding from the upper surface of the center piece of a. The contact spring 31 protrudes from the upper surface of the protrusion 33b, is bent downward, and is visible in the front-rear direction. Further, each lead piece 32 protrudes from the outer surface of each leg piece of the base 33a, and its tip end is bent downward to form an abbreviated shape. A press-contact slit 34 is formed at the lower end of each lead piece 32 and opens toward the lower edge. Furthermore, a locking projection 35 is provided protruding from the side edge of each lead piece 32, as shown in FIG. The middle frame 5 is fitted into a portion of the modular insert 3 corresponding to the protrusion 33b. The middle frame 5 has a guide hole 5 passing through the top and bottom for guiding the plug.
1, and inside the guide hole 51, as shown in FIG.
Comb teeth 52 are formed to separate each contact spring 31 from contacting each other. Engagement legs 53 that are inserted between the legs of the jack main body 33 are protruded from the lower surface of the middle frame, and a pair of protrusions 54 are formed on both left and right sides of the middle frame 5. Furthermore, a fitting groove 55 is formed in the middle frame 5 at a position different from the guide hole 51, into which a part of the protrusion 33b of the modular insert 3 is inserted. Engagement protrusions 56 are provided protruding from the side surfaces of the engagement legs 53 and engage with engagement notches 36 formed in each leg piece of the modular insert 3 . In this way, the modular insert 3 and the middle frame 5 are coupled together by engaging each other at each part. The terminal block 4 consists of a terminal frame 41 made of a conductive material and formed in a substantially U-shape that opens downward, and a locking spring 42 mounted inside the terminal frame 41. A pair of receiving pieces 43 are formed on the leg pieces, and a locking piece 44 is formed by cutting and raising the center part of the other leg piece. Further, a connecting piece 45 extending toward the receiving piece 43 is provided in the center piece of the terminal frame 41. The locking spring 42 is formed by bending an elastic metal plate, and each of the above-mentioned parts is formed by the piece 4.
A pair of upper and lower locking pieces 46a, 46b respectively facing 3.
It is formed in a shape that has. When the locking spring 42 is mounted inside the terminal frame 41, a part of the locking spring 42 engages with the locking piece 44, so that the locking spring 42 is held within the terminal frame 41 and becomes a block. It has become. However, since the terminal frame 41 and the locking spring 42 are made into a block, the locking spring 42 will not be deformed when the terminal block 4 is assembled into the body 1, and the receiver will not be able to lock with the piece 43. The holding force of the electric wire held between the pieces 46a and 46b can be made almost constant, and the quality can be stabilized. Further, the terminal block 4 is stored in each terminal storage chamber 14 of the body 1 as necessary, and
Two terminal blocks 4 are delivered for a core type, four terminal blocks 4 for a four-core type, and six terminal blocks 4 for a six-core type. The connection piece 45 protruding from the terminal frame 41 is connected to the partition wall 1 of the body 1.
3 is inserted into the arm 13a, and the connection piece 45 is press-fitted into the pressure contact slit 34 of the lead piece 32 inserted into the slit 13b, thereby connecting each contact spring 31 of the modular insert 3 and each terminal block 4. are electrically connected. A door block 6 is attached to a portion corresponding to the plug insertion port 21 in order to prevent dirt and the like from entering the housing 1 from the plug insertion port 21 when no plug is inserted. The door block 6 has an upper door body 61 and a lower door body 62
The upper door body 61 closes half of the plug insertion port 21, and the lower door body 62 closes the plug insertion port 2.
The remaining half of 1 is occluded. Lower door body 6
2 is provided with a protruding piece 63. The protruding dimension of the operation piece 63 is set to such an extent that it protrudes slightly from the front surface of the cover 2. The door block 6 is prevented from falling off by the holding convex portion 29a provided on the guide rib 29, and is guided by the guide rib 29 so that it slides without lateral vibration. The circuit block 7 includes a printed circuit board 71 on which an impedance element 73, which is a composite component of a capacitor and a resistor, is mounted.
and a connection plate 72 that electrically connects the circuit on the printed circuit board 71 to the terminal block 4. The impedance element 73 is provided to test whether there is continuity when alternating current is applied from the office side in order to test for disconnections in the telephone line, and it is configured so that direct current does not flow. The printed circuit board 71 on which the impedance element 73 is mounted is provided with a pair of left and right connection holes 74 corresponding to the conductive patterns connected to both ends of the impedance element 73. On the other hand, the connection plate 72 is formed in an abbreviated shape having a contact piece 75 that contacts one leg of the terminal frame 41 and a connection piece 76 that is connected to the printed circuit board 71. The contact piece 75 is provided with a spring piece 75a that comes into elastic contact with the terminal frame 41, and the connection piece 76 is provided with a terminal piece 76a that is inserted into the connection hole 74. Third
As shown in the figure, the terminal piece 76a is connected to the printed circuit board 71 by soldering. The printed circuit board 71 is connected to both partition walls 1
The terminal block 4 and the printed circuit board 71 are electrically connected via a connecting plate 72 disposed in the space between the terminal blocks 3 and along the inner circumferential surface of the body 1. As shown in FIG. 4, a terminal frame 41 is provided on the bottom of the body 1.
and the locking piece 46a of the locking spring 42. A pair of wire insertion ports 16 are provided at positions corresponding to the tip end portions of the wires 46b, and a release piece 17 is provided adjacent to the wire insertion ports 16. That is, each terminal block 4
Since each receiver is provided with two pairs of pieces 43 and locking pieces 46a and 46b, one pair of wire insertion ports 16 are provided corresponding to each terminal block 4. The release piece 17 is formed in a substantially U-shape with a base continuous with the side wall of the body 1, and is vertically flexible. The tip of the release piece 17 is in contact with the lower surface of the tip of the lock piece 46b, and when the release piece 17 is pushed upward from the bottom side of the body 1, the lock piece 46b is bent in the direction away from the piece 43. It has become. Further, the release piece 17 has a groove 18 into which a jig such as the tip of a driver can be inserted into a portion exposed on the lower surface of the body 1.
is formed. However, when connecting a telephone line, if the telephone line is inserted into the wire insertion port 17, the locking piece 46a
The telephone line is held between the receiver 46b and the piece 43, and when removing the telephone line, a jig is inserted into the groove 18 and the release piece 1 is removed.
7 inward of the body 1, the locking pieces 46a, 46
The receiver b can be bent away from the piece 43, and the telephone line can be easily removed. Since the telephone line may be inserted into one of the pair of wire insertion ports 16 corresponding to each terminal block 4, the other wire insertion port 16 can be used for sending wiring. Assembly is carried out in the following steps. First, the terminal block 4 is placed in the body 1, and then the modular insert 3 with the inner frame 5 attached is attached to the body 1. The terminal block 4 is installed so that the connection piece 45 is housed in the groove 13a.Next, the circuit block 7 is delivered into the body 1 with the connection plate 72 soldered to the printed circuit board 71. Furthermore, the modular insert 3 is attached with the middle frame 5 fitted. Here, in the modular insert 3, the central piece of the jack main body 33a is sandwiched between the upper end of the positioning protrusion 15 and the peripheral wall of the body 1 and fixed in position, and the lead piece 32 is housed in the slit 13b. It is installed in this way. Therefore, when the modular insert 3 is pressed against the body 1 side, the connection piece 45 of the terminal frame 41 is inserted into the pressure welding slit 34 of the lead piece 32.
is press-fitted, and when it is pushed further, the locking protrusion 3
The receiver 5 is pressed against the peripheral wall of the groove 13a and presses into the slit 34.
A force is applied to narrow the width of the pressure welding slit 34 and the pressure welding piece 4.
5 becomes reliable, and the locking protrusion 35 is locked to the inner peripheral surface of the slit 13b. In the manner described above, the electrical connection between the lead piece 32 and the terminal block 4 is established. After that, when the cover 2 with the door block 6 attached is fitted onto the body 1 and the cover 2 is pressed against the body 1, the hook 23 of the engagement piece 24 engages with the engagement hole 12, and the body 1 and cover 2 are combined. Here, when the cover 2 is placed on the body 1, the temporary engagement protrusion 25 is inserted into the engagement hole 12 as described above, so the cover 2 is temporarily fixed to the body 1. be. Also, when the cover 2 is pressed against the body 1,
As shown in FIG. 3, the lower end edge of the guide rib 29
The pressing protrusion 28 formed on the lower surface of the body 1 comes into contact with the upper surface of the terminal frame 41 of the terminal block 6, thereby preventing the inner frame 5 from shifting. This prevents sticking. In this manner, the body 1 and cover 2 are joined together as shown in FIG. 5. According to the above configuration, the impedance element 7 for line testing
3 are housed in the housing A, and there is no need to attach them externally. Therefore, a pair of wire insertion holes 16 are formed corresponding to each terminal block 4, and the impedance elements
As a result, one of the wire insertion ports 16 can be used for sending and wiring. The above-mentioned telephone modular jack can be attached to a ready-made mounting frame standardized for a wiring device that is attached to a wall or the like using a switch box. That is, if the mounting frame is made of synthetic resin, the coupling claws 26 are engaged with the mounting frame, and if the mounting frame is made of metal, the coupling holes 27 are engaged with the mounting frame. Retained. The mounting frame used is one standardized by the Japan Wiring and Appliance Industry Association for three large rectangular wires, and the mounting dimensions are set so that up to three wires can be mounted on this mounting frame. . In other words, the synthetic resin mounting frame 8 is
As shown in FIG. 9, it has an opening window 81 in the center, and the telephone modular jack is mounted so as to be exposed within the opening window 81. An engagement hole 82 into which the coupling claw 26 engages is formed on one side of the mounting frame 8, and an insertion hole 83 into which the coupling claw 26 is inserted is formed on the other side. ing. There is a holding piece 8 in the insertion hole 83.
4 is provided protrudingly, and an operating piece 85 is provided on the upper edge of the holding piece 84.
is installed protrudingly. However, the pair of coupling claws 26 that are pushed into the insertion hole 83 are engaged with shoulder portions formed on both sides of the operating piece 85 at the upper edge of the holding piece 84, and the operating piece 85 is This allows the connecting claw 26 to be removed from the insertion hole 83.The mounting frame 8 includes:
A box hole 86 into which a box screw to be screwed into the switch box is inserted, and a screw hole 87 into which a plate screw to attach a decorative plate covering the mounting frame 8 is screwed are provided. In the above embodiment, the terminal block 4 and the printed circuit board 71 were connected using the connection plate 72, but as shown in FIG. The connection to the terminal block 4 may also be made by using the terminal block 4. [Effects of the Invention] As described above, the present invention is such that a board on which an impedance element for line testing is mounted is housed in a housing, and both ends of the impedance element are connected to a terminal block. Since it is housed within the housing, there is no need to externally attach an impedance element, which has the advantage of facilitating construction work.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view showing one embodiment of the present invention, Fig. 2 is a partially cutaway front view of the same, Fig. 3 is an external perspective view of the same, and Fig. 6 is an engaging piece of the same as the above. 7 is a sectional view showing the modular insert used in the above, and FIG. 8 is an exploded perspective view of the main part showing the connection between the lead piece and the connecting piece in the above. FIG. 9 is a perspective view showing an example of a mounting frame used in the above, and FIG. 1O is a perspective view showing a printed circuit board used in another embodiment of the present invention. 3... Modular insert, 4... Terminal block,
7... Circuit block, 8... Mounting frame, 21... Plug insertion port, 31... Contact spring, 71... Printed circuit board 273... Impedance element, A... Housing. Agent Patent Attorney Ishi 1) Long 7-part cutaway side view, Figure 4 is a back view of the same as above, Figure 5 (~LN Figure 5)

Claims (1)

[Claims] (1) It has a housing whose mounting dimensions are set so that up to three cables can be attached to a mounting frame for three cables standardized for wiring devices, and the plug insertion opening opened on one side of the housing is inserted into the housing. In a telephone modular jack, the modular insert has a contact spring that electrically contacts the contacts of the inserted modular plug, and a terminal block that is electrically connected to the contact spring and connected to a telephone line, in a housing. A telephone modular jack characterized in that a board on which an impedance element for line testing is mounted is housed in a housing, and both ends of the impedance element are connected to the terminal block.