JPS6359724A - Apparatus for protecting lines in remote communication equipment - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to telecommunications equipment, in particular to a device for protecting lines in the distributor of a telephone exchange.

PRIOR ART Protective devices of the type mentioned above are known from the Federal Republic of Germany 4! It is known from the patent document No. 6212013. This known protection device can be connected to the plug contacts of the membrane module of the distributor. The B-button device has a ground and a fuse as vertical members and a parallel arrester as a horizontal member. This lightning arrester is connected to the support member of the safety device with a contact point. The contact face is inserted into a support member which is formed as an injection molded part. The tubular fuse is held at its end between the raised contact face sections of the contact face. It is advantageous if the contact area is securely fixed in the support element by injection molding onto the periphery. However, this is extremely difficult in a contact face material in which the two planes are closely aligned in a narrow row facing each other.

OBJECT OF THE INVENTION The object of the invention is to design a protection device x') consisting of seven fuses and lightning arresters that is extremely inexpensive to produce.

Means for Solving the Problems The nine means taken to solve the above-mentioned problems are such that the supporting member consists of a casing member and a printed wiring board coated on both sides, and the casing member is attached to the printed wiring board. the housing part is provided with a receiving profile for the lightning arrester and/or the fuse, and the contact surface 4 is soldered into the soldering eye of the printed circuit board. .

Effects of the Invention The invention combines the advantages of injection molded parts with those of printed wiring boards. The protective device can be well constructed for good manufacturing and equipment as well as operation. The inexpensively produced alternating printed wiring boards can be provided with conductor tracks on both sides without difficulty. The contact area can be brought into contact through the solder eyes of the printed wiring board and connected thereto, for example by wave soldering. The housing part serves for a perfect structure of the protective device surface. It can be provided with protrusions and notches for receiving and securing the positions of fuses, lightning arresters, and contact surfaces. Furthermore, it can have a reinforcing lip that maintains the mechanical stability of the protection device.

EMBODIMENTS In protection device stands having injection molded contact faces on the periphery, it is not possible to adapt the protection device to different sizes or types of fuses.

In an advantageous embodiment, it is therefore provided that optionally formed contact pads are soldered into the slotted eyes of the printed wiring board with difficulty.

According to a further advantageous embodiment, the housing part has nine retaining pins formed in one piece for the printed wiring board. Such holding pins are fitted into corresponding holes in the printed wiring board. Hot forging the pin ends produces a secure connection.

The relatively long arms described in claim 4 are brought into contact with each other on their longitudinal sides.

Because of the projecting end, the support member is provided with a recess that at the same time serves for lateral guidance of the fuse.

Cylindrical fuses are clamped on their end faces between resilient contact surfaces and rest on their longitudinal sides against the base of the casing part of the device; At least in the direction perpendicular to the mounting plane of the protective device, it has a chamfered or rounded part, and the contact face material expands towards the printed circuit board in the area of the point of contact with the mounted fuse. The extended length allows the use of extremely short and thin fuses. Instead of a fork-shaped contact face, a contact face is provided which is bent in a U-shape towards the fuse.

Moreover, the length of the base section of the contact face is limited by the length of the fuse. By varying the leg spacing, the contact face can be adapted to fuses of different lengths.

Due to the abutment of the end face of the contact face, the contact face can be held as narrow as a fuse. The contact surfaces are deflected in the longitudinal direction of the fuses, so that the partial spacing between the fuses is kept small. The contact face material will be punched out at the installation interval and attached within Km of the installation. This reduces manufacturing costs. By tilting the contact face in the area of contact with the fuse, the contact face is pressed against the base of the support member and is held securely in this position.

The contact face member is formed as a bending spring member in the shape of a leaf spring, and the ridge face spring member extends approximately perpendicularly to the mounting plane, and the free end of the bending spring member is printed. Fuses that are suitable for and installed on wiring boards,
By being supported by the casing member on the side opposite to the printed wiring board, the inclined position of the contact surface material can be reinforced when it is subjected to a strong bending load. The point of contact of the fuse with the contact surface is located close to the support point, so that the tightening force is correspondingly high.

The contact pad is bent in a U-shape towards the printed circuit board and is fixed to this, so that the contact pad can be connected to the conductor tracks arranged at the base of the support member and the electrical conductor tracks. connected. The support member consists of, for example, a boolint circuit board and a casing member,
The housing part is designed as an injection molded part;
and has a receiving shape for a fuse. The casing member is provided with a support shoulder for supporting the contact face at the end opposite the base.

Since both legs of the contact plate have a spring force storage when the fuse is installed, the legs of the U-shaped contact plate are widely separated from each other. This results in the fuse being sometimes pressed obliquely against one of the contact faces during installation, and the free spring leg of the contact face allowing the other end of the fuse to be pushed along the opposite contact face. A given mounting can be varied as much as it can be brought to a location.

Furthermore, the fuse can be laterally fixed in that the contact face is bent concavely in cross section towards the fuse in its contact area.

In addition, since the contact surface material is bent more strongly than the end surface of the fuse, the contact surface material can be supported on the fuse at two points.

A tongue in which the contact face adjacent to the arrester at least in the area of its base section projects away from the printed wiring board? ,
By having it rest on the spring fingers of the vane-like multilayer earth of the protection device, the contact face can be brought into direct contact with the finger-like earth of the multilayer earth. As a result, when the ring-shaped fusible body of the protection device is cut out, the finger-shaped earth rests directly on the protruding tongue, and the subscriber line guided outwards is placed on the ground.

The free end of the contact face material protrudes into the opening of the casing member and is in contact with the inner wall of the opening under tension when the fuse is not installed, so that contact force is reduced when installing the fuse. A slight deflection of 3 is sufficient without the need for a reduction.

Embodiments As shown in FIGS. 1, 2, and 6, the protective device 1 includes a crushed printed wiring board 2, a casing member 3, a contact surface material 4, a fuse 5, a lightning arrester 3, a fusible body γ, and a crushed printed wiring board 2 on the same side. Consists of multiple earths 8. The printed wiring board 2 is provided on both sides along its longitudinal edges with contact surfaces 9 for contact springs 10 of membrane modules in the distributor of a telephone exchange.

Contact springs 10 located above and below each other connect conductor paths 11 of printed wiring board 2, contact surface material 4, and fuse 5 to each other so that current flows therebetween. A conductor track 11 is arranged on the side of the printed wiring board 2 facing the fuse 5 and the lightning arrester 6 and is connected to the core of the subscriber line guided outwards via a corresponding contact spring 1u. There is.

This conductor path extends to the underside of the surge arrester 6, forming an enlarged contact area for the fusible body 7, which is held between the surge arrester 6 and the contact area. Furthermore, the conductor track 11 is guided via a through-contact solder eye, which is in direct r4 contact with the contact area for the lightning arrester 6. One side of the contact face 4 for the fuse is soldered to the brazing eye. The other contact surface 4 is soldered to a solder eye adjacent to the contact surface 9, which is connected to a conductor track located on the curved edge side of the printed circuit board 2.

A flat contact surface 4 is formed in the form of a fork, and the fuse 5 is held at its pole between the spring legs 120. The contact surface material is brazed with a bar 21 vertically positioned in the through-contact hole of the printed wiring board 2. Surge arresters 6, vertically positioned above the printed wiring board 2 and offset from each other, are held between the spring fingers 14 of the vane-shaped multiple earth 8 and the fusible body γ. The spring fingers 14 extend over the free end faces of adjacent contact surfaces 4 that are offset from each other. The spacing between the spring finger 14 and the contact face 4 is smaller than the thickness of the fusible body 7.

When the cantilever body is bath-cut, the spring fingers 14 are attached to the contact surface material 4.
, and therefore the railway line? 'iTethered directly to the ground.

The spring fingers 14 are formed with slits at their free ends on the ± side of the contact face 4, so that a double contact with respect to the contact face 4 is obtained.

The multiple earth 8 is designed as a U-shaped bent sheet metal part, which rests against the printed circuit board 2 with its legs and grips the protection device 1 .

The casing member 3 formed by injection molding is mounted on the printed wiring board 2 and is joined to this printed wiring board by hot forging of a bottle 15 that protrudes through a hole in the printed wiring board 2. There is. The casing member 3 is
It is provided with an annular retaining edge 16 which forms a reception area for the lightning arrester 6 and the fuse 5 and which mechanically stabilizes the protection device. Furthermore, a grip member (not shown) is attached to the casing member 3 to facilitate better operation of the protective device.

According to FIGS. 4 and 5, the protection device 1 is provided with a U-shaped contact surface material 18 instead of the flat contact surface material 4 (FIG. 1), and this contact surface material is one nK, so
It is brazed into the brazing eye of the printed wiring board 2. Are the freely deflectable spring legs paired with each other? two tubular short fuses 1 facing each other and each having one tubular short fuse 1;
9 is tightened on the end face side. The free leg of the contact surface material 18 is
They are widened towards the support plate and thereby press the fuse 19 against the space of the housing part 3. The spacing between the legs of the contact face 18 matches the length of the fuse 19. The end of the contact face 18 facing away from the printed wiring board rests against the stop shoulder 17 of the casing part 3 on the side facing away from the fuse. This reduces the spring distance and increases the clamping force. The contact pads 18, which are offset from one another in accordance with the position of the lightning arrester 6, have a plurality of tongues 13 that protrude from the printed wiring board 2 in the extension of the soldered F legs, these tongues Is it the same wall structure as the flat contact according to FIG. 1 compared to the spring finger 14? have.

As shown in FIGS. 6 and 7, the free spring leg of the contact face 18 is curved concavely in its longitudinal direction towards the fuse 19, so that the fuse can be oriented in a given lateral direction. A stable layer is formed at the position.

As shown in FIG. 8, the fuse 19 is first pressed against the contact surface material 18 with its end portion inclined.

The contact face has a spring force storage R that is large enough to be deflected widely enough for the other end face of the fuse 19 to be slid past the base section of the further contact face 18. The end of the free leg of the contact face rests against the opening, which prevents a particularly strong return spring action of the pretightened free spring leg.

[Brief explanation of drawings]

Fig. 1 is a partially sectional side view of the protection device according to the invention, Fig. 2 is a plan view of the protection device of Fig. 1, and Fig. 6 is a side view of the protection device according to the invention.
4 is a side view of a further embodiment of the protective device; FIG. 5 is a top view of the protective device according to FIG. 4; FIG. 6 is a plan view of the protective device according to FIG. 4. 7 is a side view of the contact surface material shown in FIG. 6, and FIG. 7 is a plan view of the contact surface material according to FIG.
FIG. 8 is a partial side view of a portion of the protection device according to FIG. 4 immediately before the bag layer. DESCRIPTION OF SYMBOLS 1... Protective device, 2... Printed wiring board, 3... Casing member, 4... Contact surface material, 5... Fuse,
6... Lightning arrester, 7... Fusible body, 8... Multiple earthing, 9... Contact surface, 10... Contact spring, 11... Conductor path, 12... Spring leg, 13... ... Tongue piece, 14...
Spring finger, 15... Pin, 16... Protective edge, 17
...stop shoulder, 18...contact surface material, 19.
... Fuse, 21... Brazing is a bar material. FIGi FIG3 1 ・Folding J device

Claims (1)

[Claims] 1. A device for protecting lines in a distributor of a telecommunications device, wherein the protective device (1) connectable to a contact spring (10) of a membrane module of the distributor is provided as a vertical member. earth and the fuse (5) are provided with parallel lightning arresters (6) as transverse members, which are held on the support members (2, 3) of the protective device (1) and on the contact members. (4)
The contact member is in contact with the support member (2).
, 3), in which the support member is coated on both sides with the casing member (3), and is connectable to the contact spring (10) via electrical conductors arranged in two planes. a printed wiring board (2), on which a housing part (3) is mounted, which housing part has a receiving shape for the lightning arrester (6) and/or the fuse (5). A device for protecting a line in a telecommunications device, characterized in that the contact member (4) is soldered into the brazing eye of the printed circuit board (2). 2. Device according to claim 1, in which different contact members for receiving different types of fuses and/or lightning arresters can be installed in the brazed eyes of the printed wiring board (2). 3. Device according to claim 1 or 2, in which the casing part (3) has integrally molded pins (15) for holding the printed wiring board. 4. The elongated fuse (5) is designed as a flat sheet metal plate with an etched conductor track and lateral contact surfaces at both ends, with flat contact elements (4) being formed on these contact surfaces. Claims: The fuse (5) is gripped in a fork-like manner, and the casing member (3) has a notch, and the end of the fuse (5) protrudes into the notch. The device according to any one of paragraphs 1 to 6. 5. Cylindrical fuses (19) are clamped at their end faces between spring-elastic contact members (18) and rest on their longitudinal sides against the base of the casing member (3) of the device; furthermore, the end face of the fuse (19) is at least connected to the protective device (1).
The printed wiring board (2) has a chamfered part or a rounded part in a direction perpendicular to the mounting plane of the printed wiring board (2), and the contact member (18) has a chamfered part or a rounded part in a direction perpendicular to the mounting plane of the printed wiring board (2). Device according to any one of the claims 1 to 6, which extends towards the device. 6. The contact element (18) is designed as a bending spring element in the form of a leaf spring, which extends approximately perpendicularly to the mounting plane and whose free end is Claim 5: facing the printed circuit board (2) and adapted to be supported by the casing member (3) on the side of the installed fuse (19) opposite the printed circuit board Apparatus described in section. 7. The contact member (4) according to claim 4 or 5, wherein the contact member (4) is bent in a V-shape toward the printed wiring board (2) and is fixed to the printed wiring board. Device. 8. Claim 6, wherein both legs of the contact member (18) have a spring force storage amount when the fuse (5) is attached.
The device according to paragraph 7 or paragraph 7. 9. Any one of claims 1 to 8, in which the contact member (18) is bent concavely in cross section toward the fuse (19) in its contact area. The device described. 10. The device according to claim 5, wherein the contact member (18) is bent more strongly than the end face of the fuse (19). 11, at least the contact member (1) adjacent to the lightning arrester (6)
8) is printed wiring board (2) within the range of its base classification.
The tongue piece (13) protruding away from the blade-like multiple earth (8) of the protective device (1)
11. The device according to claim 1, wherein the device is for mounting on a spring finger (14) of a device. 12. Claim 1, wherein the free end of the contact member protrudes into the opening of the casing member (3) and abuts the inner wall of the opening under tension when no fuse is installed. 12. The device according to any one of items 1 to 11.