JP2007013670A - Protector sub-module for communication - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the width of a protector sub-module while maintaining strength and insulation distance required by a U slit terminal even if the U slit terminal to be loaded is a double U slit terminal, in a protector sub-module for communication in which a plurality of U slit terminals for input line connection for connecting jumper wire from a subscriber side communication line to a connection connector being an output end to an exchange are provided on a front side in alignment. <P>SOLUTION: A U slit forming part 21 of U slit terminals 2 is formed in a plate shape, and the U slit forming part is provided inclinedly at a prescribed angle with respect to the alignment direction of the U slit terminal lines 2A and 2B. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention is mounted on a main wiring board installed at an interface part between a switch side and a subscriber side in a place where a communication device such as a PBX (private branch exchange) or a telephone switch is installed, and is overvoltage and overcurrent caused by lightning. In particular, the present invention relates to a protector module that protects an exchange from each other, separates a communication line, and performs input / output connection processing of the communication line. In particular, a predetermined number of steps are required to form the protector module. It relates to the protector submodule to be stacked.

  FIG. 12 shows a conventional protector submodule 100. The protector submodule 100 is attached to two printed wiring boards 110A and 110B (only the front printed wiring board 110A is visible in the figure) that are arranged in parallel at a distance from each other and each wiring board. Also, overvoltage / overcurrent protection elements, for example, PNPN type semiconductor elements (only the protection element 120A on the printed wiring board 110A is visible in the figure), and attached to both printed wiring boards on the front side of the protector submodule. Separation of communication lines attached to both printed wiring boards on one side surface (right side surface in FIG. 12) of the U-slit housing 130 which covers the entire U-slit terminal for connecting the incoming line In addition, a test ammunition 140 for testing, and a connector for outgoing line connection similarly attached to both printed wiring boards on the one side surface And a 50.

  In the gap between the two printed wiring boards 110A and 110B, from the inlet 160a provided on the other side surface (the left side surface in FIG. 12) of the protector submodule 100 to the one side surface to the U-slit housing 130. A plurality of line openings 160 extending in parallel are provided. The two A and B jumper wires for one line connected to the subscriber side line are inserted into each through-hole 160a from the introduction port 160a, and the end of the jumper wire reaching the U-slit housing 130 is A Each of the U-slit terminals for one line composed of a pair of U-slit terminals, one for line and one for B line, is connected to each U-slit terminal.

  In the U-slit housing 130, a plurality of pairs of U-slit terminals are accommodated so that the rows of U-slit terminals for A-line and the rows of U-slit terminals for B-line are aligned in parallel, If the lower row is for the B line and the lower row is for the B line, the base end of the U-slit terminal for the A-line in the upper row is fixed to the upper printed wiring board 110A, and the base end of the U-slit terminal for the B line in the lower row Is fixed to the lower printed wiring board (110B).

  The base end of the U-slit terminal for the A line is connected to the overvoltage / overcurrent protection element 120A in a one-to-one manner via a printed wiring formed on the upper printed wiring board 110A. The base end of the U slit terminal is connected to the overvoltage / overcurrent protection element on the lower printed wiring board (110B) in a one-to-one manner.

  Each overvoltage / overcurrent protection element 120A on the upper printed wiring board 110A is connected to a pair of armature springs in a joint-joined state in the test ammunition 140 via a printed wiring formed on the upper printed wiring board 110A. The other elastic spring is connected to one corresponding terminal in the outgoing line connection connector 150 through a printed wiring formed on the upper printed wiring board 110A. Similarly, each overvoltage / overcurrent protection element on the lower printed wiring board (110B) is connected to one of the other joint-bonded states in the test ammunition 140 via the printed wiring formed on the lower printed wiring board. It is connected to one of the pair of bullet springs, and the other bullet spring is connected to one corresponding terminal in the outgoing line connection connector 150 via a printed wiring formed on the lower printed wiring board. .

  The outgoing line connection connector 150 is a telephone switchboard connected via a connection cord with an insertion plug that is connected to the connector after the protector module in which protector submodules are stacked is mounted on the main wiring board. The two A and B jumper lines for one line that are connected to the subscriber side line in this way are connected to the telephone exchange via the protector submodule 100 to form one communication line. For example, 8 or 16 communication lines are formed for each protector submodule.

  As described above, the U-slit terminals are juxtaposed in two rows on the front end face of the flat protector sub-module 100, and each U-slit is opened to the front side of the U-slit housing in the longitudinal direction of the U-slit housing ( The horizontal arrangement of the protective device sub-modules is equivalent to the horizontal direction when viewed from the front side). However, as a trend, the number of U-slit terminals mounted on one protective device sub-module is increased. It is desired.

  However, as the number of U-slit terminals is increased, the longitudinal dimension of the U-slit housing inevitably increases, which results in an increase in the width dimension of the protector submodule. When the protector modules formed by stacking the protector submodules are mounted on the ready-made main wiring board and used, there is a problem that a sufficient working space for the protector submodules cannot be secured.

  In particular, the U-slit terminal has a double slit (two U-slits are formed in one U-slit terminal) (see FIG. 10 and FIG. 11 of Patent Document 1 below). The slit terminal is called “U-slit terminal that can be attached with multiple”), and the width dimension of the U-slit terminal is larger than that of the single-slit U-slit terminal. Become.

  Therefore, when using a double U-slit terminal, as shown in FIG. 13, the security record submodule arranges 8 U-slit terminals 170 having two slits 170a and 170b for each of the A line and B line. Currently, it is manufactured for 8 lines (FIG. 13 shows a row of U-slit terminals for A line).

Japanese Utility Model Publication No. 6-44278

  In order to cope with the problem of the increase in the width dimension as described above when the number of lines of the protector submodule is increased, the pitch between the U slit terminals in each row of the U slit terminals for the A line and the B line is set as follows. Attempts have been made to narrow or reduce the width dimension of the U-slit terminal. However, the former has a restriction that a predetermined insulation distance must be provided between the U-slit terminals. In order to secure the necessary strength, there is a limit to the reduction of the width dimension, and these have become obstacles and have not yet achieved the expected effect.

  Therefore, the present invention increases the number of U-slit terminals to be mounted in the protector submodule as described above. In particular, even in a double U-slit terminal in which two U-slits are arranged in parallel, The object is to reduce the width dimension and at the same time maintain the required strength and insulation distance of the U-slit terminal.

  The invention according to claim 1, which achieves the above object, comprises a plurality of in-line connection U-slit terminals for connecting jumper lines from a subscriber side communication line to a connection connector which is an output end to an exchange. In the communication protector submodule arranged in line, at least the U-slit forming portion of the U-slit terminal is formed in a plate shape, and the U-slit terminal is arranged in the alignment direction. On the other hand, when viewed from a right angle direction, a gap is not formed between the U slit forming portions.

  As described above, the plate-like U-slit forming portions of the U-slit terminals are inclined at a predetermined angle with respect to the arrangement direction of each row, and the above-described gap is not formed between adjacent U-slit forming portions. By doing so, the arrangement pitch between the U-slit forming parts is reduced, so that the arrangement length of the U-slit terminals is suppressed, and even if the arrangement length of the U-slit terminals is suppressed in this way, As a result of the inclined arrangement, a predetermined insulation distance or insulation space is ensured between the U-slit forming parts, and as a result, while maintaining the necessary width dimension required for the plate-like U-slit forming part, The length of the slit terminal row can be reduced, and therefore the width dimension of the protector submodule can be reduced.

  As described in claim 2, when the U-slit forming part is configured as a double U-slit terminal in which two U-slits are arranged side by side, the significance of the present invention is particularly exhibited. Double U-slit terminals, for example, when changing exchanges or temporarily relocating to expand or renovate, but because the temporary dwelling is in the same station, it is necessary to use the telephone without changing the telephone number. Although it can respond, since two U slits are provided, a U slit formation part becomes wide inevitably. According to the present invention, even when the U-slit forming portion is wide, the arrangement pitch of the U-slit terminals can be reduced. Therefore, the width of the protector submodule increases as the number of U-slit terminals to be mounted increases. The problem can be solved.

  According to a third aspect of the present invention, when the inclination angle of the U-slit forming portion is about 13 ° to about 20 °, the thickness of the U-slit terminal array portion is increased without increasing the thickness dimension of the U-slit terminal arrangement portion. The width dimension can be reduced.

  When the inclination angle is 13 ° or less, the thickness dimension of the U-slit terminal arrangement portion (that is, the thickness dimension of the protector submodule) does not increase, but the insulation distance becomes 0.36 mm or less and the electrical insulation is achieved. This is a problem in terms of performance and material fluidity during plastic molding. When the inclination angle is 20 ° or more, the thickness dimension of the U-slit housing is 0.15 mm on one side (that is, on the side of one U-slit terminal row), that is, 0 on the sides of both the A and B U-slit terminal rows. .3 mm, which increases the thickness dimension of the U-slit terminal array.

  On the other hand, when the inclination angle is in the above range, for example, about 15 °, the thickness dimension of the protector submodule does not increase and the insulation distance is 0.5 mm. This value provides positive insulation between the U-slit terminals and is advantageous for material flow during plastic molding.

  In addition, when focusing on the vertical displacement of the double connection position (that is, the distance between the two U-slits of the double U-slit terminal when viewed in the direction orthogonal to the U-slit terminal arrangement direction), the inclination angle When the angle is about 15 °, the deviation value is 0.48 mm, whereas at 21 °, the deviation value becomes as large as 0.66 mm. If the deviation value becomes large in this way, it is not suitable in terms of sharing the wiring tool. .

  As described above, the inclination angle of the U-slit forming portion is about 15 considering comprehensively ensuring the minimum insulation distance, optimizing the reduction of the width dimension of the U-slit housing, minimizing the vertical displacement of the connection position, and the like. ° is the optimum value.

  According to a fourth aspect of the present invention, in the first to third aspects of the invention, a sharp edge is formed on the outer side of the U-slit terminal in the jumper wire drawing direction at a predetermined interval from the U-slit terminal. A cutting terminal having a V-shaped cutting groove is attached.

  By configuring in this way, when the tip of the jumper wire is pushed from the mouth of the U-slit toward the back by the connecting tool, the extra length of the jumper wire is also cut in the middle of the connecting tool. It is pushed into the V-shaped cutting groove by the projecting part, and unnecessary jumper wire end portions are simultaneously cut off. In this case, the groove edge of the V-shaped cutting groove is sharply formed in a knife edge shape. As a result, it is possible to cut off the end portion of the jumper wire without requiring a large pushing force to be applied to the connection tool. As a result, a large amount of the protector submodule component member at the time of cutting work can be obtained. There is no spillover of impact force or pressing force, and it is not necessary to make the component member thick and strong so that it can withstand a large impact force. , And by extension that allows the size of the protector submodule.

  As described in claim 5, when the U slit terminal and the cutting terminal are entirely covered with a U slit housing to protect the U slit terminal and the cutting terminal, Correspondingly, because it has a cutting terminal, when the jumper wire is cut, no impact load is applied to the conventional U-slit housing, and the housing is not damaged or broken by the cutting blade of the cutting tool. The mechanical strength of the housing does not have to be considered in terms of design as in the conventional product. This makes it possible to reduce the thickness of the U-slit housing and thus to reduce the size of the protector submodule.

  According to the present invention, an increase in the number of U-slit terminals mounted on a communication protector submodule is achieved without a significant increase in the size of the protector submodule, and a double having a particularly large width dimension. When the number of U-slit terminals is increased, the increase in the width of the protector submodule can be effectively suppressed, and accordingly, the communication protector submodule with the increased number of communication lines is stacked. Even when the communication protector module is mounted on the existing main wiring board, a sufficient space for various operations for the protector module can be secured in the same manner as the conventional general communication protector module.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.

  1 is a plan view of a communication protector submodule 1 according to the present invention, FIG. 2 is a perspective view of the protector submodule, and the same members as those of the conventional protector submodule shown in FIG. Since the connection state is the same as that described with reference to FIG. 12, the same reference numerals as those used in FIG. 12 are attached to the drawings of the present invention, and detailed description thereof will be omitted.

  The present invention provides a U-slit terminal provided at the front end portion of the communication protector sub-module 1 having a substantially rectangular shape and a flat shape in plan view, an arrangement thereof, and a U-slit housing that covers these U-slit terminals. There are features.

1 and 2 show the base (FIG. 1) of the ₁₆ A-line U slit terminals 2A ₁ , 2A ₂ , 2A ₃ ... 2A ₁₆ attached to the printed wiring board 110A and the other printed wiring. 16 B-line U-slit terminals 2B ₁ , 2B ₂ , 2B ₃ ... 2B ₁₆ attached to the plate (110B) and the entire A-line and B-line U-slit terminals A plastic U-slit housing 3 is shown which is covered or covered and mounted on the printed wiring boards 110A and 110B.

  All the U-slit terminals have the same shape, and FIG. 3 shows a perspective view of an embodiment of the U-slit terminal 2 formed as a double U-slit terminal. The U-slit terminal 2 according to this embodiment is formed by punching and pressing a thin metal plate into a long and narrow shape, and a U-slit forming portion 21 provided with two U-slits 21a and 21b extending in the vertical direction in parallel. And a base 22 fixed to the printed wiring board 110 </ b> A (110 </ b> B), and a narrowed portion 23 that connects both the parts 21 and 22. The base 22 is formed with a fixing hole 22a for fixing the U-slit terminal 2 to the printed wiring board, and an L-bending portion 22b for connecting the U-slit terminal 2 to the printed wiring on the printed wiring board.

  The U-slit forming portion 21 and the base portion 22 are twisted with each other at the constricted portion 23, and the twist is caused by an angle of 15 ° between the vertical plane including the U-slit forming portion 21 and the vertical plane including the base portion 22. It is done to make. In this way, by providing an angle of 15 ° between the two, a plurality of U-slit terminals 2 are aligned and fixed in the same plane in the horizontal direction at the front end of the printed wiring board to form a printed wiring board. When attached, the U-slit forming part 21 is inclined with an angle of 15 ° with respect to the arrangement direction of the U-slit terminals 2. This 15 ° is a preferable angle because the width dimension can be reduced without increasing the thickness dimension of the U-slit housing, as will be described below. However, the present invention is limited to this angle. It is not something. When the base portion 22 is attached to a printed wiring board, the size and shape thereof are determined so that an insulation distance is provided between them.

  FIG. 4 shows a state in which the U-slit terminal row 2A for A jumper wire connection and the U-slit terminal row 2B for B jumper wire connection, which are aligned and fixed to the printed wiring board as described above, are mounted on the U-slit housing 3. As seen from the front side of the slit housing 3 and FIG. 5 which is an enlarged view of the portion A in FIG. 4 and FIG. 4, the U-slit forming portions of the U-slit terminals in each row are shown in FIG. In this case, the U-slit terminals are arranged in a direction perpendicular to the direction in which the U-slit terminal rows are arranged (direction W in FIG. 11). When it sees from, it is performed so that a clearance gap may not be formed between U slit formation parts.

  In this way, the U slit forming portion 21 of the U slit terminal 2 is inclined, and at that time, no gap is formed between the U slit forming portions, thereby reducing the arrangement pitch of the U slit terminals and the U slit terminal. The arrangement length can be suppressed, and at the same time, a necessary insulation distance S (see FIG. 5) can be secured between the adjacent double U-slit forming portions 21, and the width dimension of the U-slit forming portion 21 is reduced at that time. There is no need to let them. In the illustrated embodiment, the arrangement pitch of the U slit terminals corresponds to the width dimension H (see FIG. 3) of the U slit terminals. For example, when the width dimension of the U slit forming portion 21 is 4.1 mm, The pitch is set to 4.1 mm. As a result, the length of the entire row is longer than that in the case where the U-slit forming portions 21 are arranged in the same plane without being inclined and a necessary insulation distance must be secured. As a result, the width-direction dimension of the U-slit housing 3 can be reduced by 10.5 mm, and a necessary insulation distance of about 0.5 mm can be ensured. This is particularly advantageous when the U slit terminal is wide, such as when it is a double U slit terminal.

  The U-slit housing 3 mounted on the printed circuit board 110A (110B) is provided with a slit into which a U-slit terminal fixed to the printed wiring board can be inserted from the back side, that is, the side facing the printed wiring board. As shown in FIG. 5, the slits open to connecting grooves 3c and 3d between the strain reliefs 3a and 3b formed on the front surface side of the U-slit housing 3 corresponding to each U-slit terminal. The U-slit terminal inserted into each slit is disposed in the groove with the U-slits 21a and 21b entering the connection groove portions 3c and 3d.

  As shown in FIG. 5, the U-slit housing 3 further has a cutting terminal 4 at a position on the outer side (edge side) in the jumper wire drawing direction with respect to the arrangement position of each U-slit terminal in each U-slit terminal row 2A, 2B. The holding is performed by inserting the main body portion 4c of the cutting terminal 4 into the cutting terminal holding slit formed between the strain reliefs 3a, 3a on both sides of each U-slit terminal.

  FIG. 6 shows an embodiment of the cutting terminal 4 corresponding to the double U-slit terminal on an enlarged scale. This cutting terminal 4 is formed of a substantially rectangular thin plate piece, two V-shaped cutting grooves 4a and 4b are formed at the upper end, and the groove edges of the respective cutting grooves 4a and 4b are sharply formed in a knife edge shape. ing. The main body portion 4c of the cutting terminal 4 is formed with a pressing boss 4d in order to prevent the cutting terminal 4 inserted into the cutting terminal slit from coming out of the slit, and at the center of the main body portion 4c, An engagement hole 4e is provided for engaging the cutting terminal 4 with the tool when the cutting terminal 4 is inserted into the holding slit.

  The positional relationship between the cutting terminal 4 inserted and attached to the U-slit housing 3 and the strain reliefs 3a and 3b is shown in FIGS. In particular, as is apparent from FIG. 4, the cutting terminal 4 is positioned so that the V-shaped cutting grooves 4a and 4b are continuous with the connecting grooves 3c and 3d between the strain reliefs 3a and 3b, respectively. The U slits 21a and 21b and the V-shaped cutting grooves 4a and 4b in 3c and 3d are in a state of being arranged in series with the connection groove portions 3c and 3d interposed therebetween.

FIG. 7 shows the height relationship between the double U-slit terminal 2 and the cutting terminal 4 and the strain reliefs 3a and 3b. As is apparent from FIG. The terminal 4 extends beyond the tip. FIG. 8 shows the positional relationship between the double U-slit terminal 2 (2A ₁ , 2A ₂ , 2A ₃ ...; 2B ₁ , 2B ₂ , 2B ₃ ...) And the cutting terminal 4. Reference numeral 3d in FIG. 8 denotes a gap used to push the cutting terminal 4 by engaging the tool with the engaging hole 4e when the cutting terminal 4 is inserted into the holding slit of the U-slit housing. The gap 3d communicates with the holding slit.

  The U-slit housing 3 further has a lead-out port 3e that communicates with each through-hole 160 (see FIG. 1) between the two U-slit terminal rows 2A and 2B. The connection groove portions 3c and 3d related to the corresponding U-slit terminals are opened laterally.

The jumper wire is connected to the U-slit terminal as follows. For example, when a jumper wire for one line is joined to the pair of U-slit terminals 2A ₁ and 2B ₁ at the left end in FIG. 4, it is inserted from the introduction port 160a to the left end through-hole 160 in FIG. The tip ends of the two A and B jumper wires are led out from the lead-out port 3e at the left end of FIG. 4, and the A jumper wire is _one of the connection groove portions 3c and 3d related to the U slit terminal 2A1. The tip is extended beyond the cutting terminal 4.

  Next, each jumper wire placed in this way is pushed into the opposing U-slits 21a and 21b using a connection tool as shown in FIG. 9, and at that time, the covering of the jumper wire which is a covered wire is performed. The jumper wire and the U-slit terminal are electrically connected to each other, and the extra length portion extending in the wire drawing direction beyond the cutting terminal 4 is also V-shaped so that the jumper wire faces the connection tool. It is cut off by being pushed into the groove.

  The wire connection tool 5 has a handle 51, a tip operating portion 52, and a hook portion 53. The tip operating portion 52 is, as shown in FIG. 10, a second jumper wire arranged in parallel with the first jumper wire pressing portion. A pressing portion 522, a cutting projection 523, and an alignment projection 524 are provided. The first jumper wire pressing portion 521 is fitted into the connecting groove portion 3c (see FIG. 5), and the second jumper wire pressing portion 522 is fitted into the connecting groove portion 3d (see FIG. 5). The part 523 is arranged so as to be moved back and forth with the cutting terminal 4 (see FIG. 5), and the positioning projection 524 is sized and shaped so as to be fitted into the outlet 3e.

  The first jumper wire pressing portion 521 and the second jumper wire pressing portion 522 are spaced apart from each other with a gap 525 into which the strain relief 3b (see FIG. 5) can be fitted, and both pressing portions are connected to the connecting groove portion 3c. , 3d is formed so as to be separated from the U-slit forming portion 21 so as to be able to enter, and the cutting protrusion 523 is in contact with the outer surface of the cutting terminal 4 while moving. As shown, the gap 525 into which the cutting terminal 4 enters is formed between the end portions of the first jumper wire pressing portion 521 and the second jumper wire pressing portion 522.

  FIG. 11 shows the state of the distal end working unit 52 that is performing a pushing operation for jumper wire connection and cutting operations.

  The tip operating portion 52 can effectively connect the jumper wire to the U-slit, and can smoothly perform the jumper wire extra length portion with a small pressing force in cooperation with the cutting terminal 4. That is, when the jumper wire is cut, an impact load on the U-slit housing 3 is not applied, the U-slit housing is not broken or broken, and the burden on the jumper connection operator is reduced, and the feeling of fatigue is eased. Become.

It is a top view of the communication protector submodule by this invention. It is a perspective view of the communication protector submodule according to the present invention. It is a perspective view of the U slit terminal used for the communication protector submodule by this invention. It is the enlarged scale view which looked at the protector submodule for communication of FIG. 1 from the front side. It is an enlarged scale detail drawing of the A section in FIG. It is a perspective view of the cutting terminal used for the communication protector submodule by this invention. It is a perspective view of the whole U-slit housing. It is the perspective view which fractured | ruptured and showed the mutual relationship of the U slit terminal of this invention, a cutting | disconnection terminal, and a U slit housing. It is a perspective view of the connection tool used for the connection operation | work with respect to the communication protector submodule of this invention. It is a perspective view of the front-end | tip operation | movement part of a connection tool. It is explanatory drawing which shows the mutual relationship of the front-end | tip operation | movement part of a wiring tool at the time of a wiring work, a U slit terminal, and a cutting terminal. It is a top view of the conventional communication protector submodule. It is a top view of the conventional communication protector submodule which has a double U slit terminal.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Communication protector submodule 2 U slit terminal 2A, 2B U slit terminal row 21 U slit formation part 21a, 21b U slit 22 Base 3 U slit housing 3c, 3d Connection groove part 4 Cutting terminal 4a, 4b V-shaped cutting Groove 5 Termination tool 52 Tip action section

Claims (5)

In a communication protector submodule in which a plurality of in-line connection U-slit terminals for connecting jumper lines from a subscriber side communication line to a connection connector which is an output terminal to an exchange are arranged on the front side ,
At least the U slit forming part of the U slit terminal is formed in a plate shape,
The U slit forming portion is inclined at a predetermined angle with respect to the alignment direction of the U slit terminal row;
The U-slit terminals are arranged so that no gap is formed between the U-slit forming portions when the U-slit terminal row is viewed from a direction perpendicular to the arrangement direction. Communication protector submodule.   The protector submodule according to claim 1, wherein the U slit forming portion is configured as a double U slit terminal in which two U slits are arranged side by side.   The protector submodule according to claim 1 or 2, wherein an inclination angle of the U-slit forming portion is about 13 ° to about 20 °.   A cutting terminal having a V-shaped cutting groove having a sharp edge at a predetermined interval from the U slit terminal is attached to the outside of the U slit terminal in the jumper wire drawing direction. The protector submodule according to any one of claims 1 to 3. The protector submodule according to claim 4, wherein the U-slit terminal and the cutting terminal are installed in a state of being entirely mounted on the U-slit housing.

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