KR100232666B1 - Protection plug - Google Patents

Abstract

The present invention relates to a protective plug for a telecommunication device, and more particularly to an overvoltage protective plug. Generally, the protection plug has a housing having a printed circuit board, a voltage surge breaker, a slider, a spring, a ground plate, and a signaling device.

It is an object of the present invention to develop a protective plug that can reliably protect against a voltage surge. In the present invention, the soldering position should be loaded to the minimum range, composed of parts of the extreme speed, should be able to be automated at low cost, and clearly shows the stopped state to the outside, so that the slider 4 can be Preloaded by the spring 8 on the support surface 17 and on the inner housing wall in the housing 1, the brazing material shaping portion 7 being loaded to the minimum range only by the spring force (pressure) of the slider 4. do.

Description

Protective plug

1 is an exploded view of the basic components of the protective plug.

2 is a perspective view of a slider.

3 is a side view of an open plug.

4 is a front view of the open lower side of the plug (if there is no printed circuit board).

5 is a front view of an upper side of a printed circuit board.

6 is a front view of the lower side of the printed circuit board.

* Explanation of symbols for main parts of the drawings

1 housing 2 printed circuit board

3: voltage-surge breaker 4: slider

5 signaling element 6 guide plate

7: solder material shaping portion 8: spring

9: support 10: connection wing

11: receiver 12: connection surface

13: groove 14: braid-spring portion

15: end 16: web

17: support surface 18: contact

19: end stop 20: edge

21: bearing portion 22: outer peripheral surface

23 pin 25 SMD solder pad

26: fuse element 27: ground plate

28: remaining surface 29: connection surface

30: spring arm 31: internal housing wall

32 opening 33 housing wall

34: grounding rail

[Background of invention]

The present invention relates to a protective plug, and more particularly to a voltage-surge protective plug for a telecommunication device according to claim 1.

The type of protective plug referred to herein is described in DE 40 26 004 C2, which plug is adapted for short protection with a measuring and disconnecting position. The protective plug is melted by improper thermal rise of the housing, the low side formed by the board of the printed circuit, the voltage surge-breaker, slider, spring, ground plate, signal lug, voltage-surge breaker, It is provided with a soldering position to generate the movement of the slider and to move the signaling lugs in order to show to the outside.

As described above, since many separate parts must be used in the conventional protection plug, economical manufacturing is difficult, and the load on the position at the time of lead appears as a spiral spring with elastic force, causing the solder material to escape. .

It is an object of the present invention to develop a protective plug for reliable protection against voltage surges, where the soldering position should be loaded to the minimum range, consist of very few components, and be able to be automated at low cost. It must clearly indicate the tripped state.

The solution of the above object is realized through the features as defined in claim 1.

The protective plug provided according to the invention should have several components with the following requirements.

Coarse protection

-Stabilizer with optical signal

Current protection

-Measuring position

The course protection is implemented through known methods by voltage-surge breakers. The safety structure connected to the voltage-surge breaker provides thermal protection by shorting the telephone lines a and b to ground when the voltage-surge breaker is overloaded. The short circuit structure is realized by a slider, on the rear side of which the red signaling element obviously moves out of the plug when a voltage surge occurs.

The tripping of the safety device connection is realized by solder material shaping. The thermal rise of the voltage-surge breaker is caused by a welded or clamped guide plate to melt the brazing material form. Solder material shaping must have minimum requirements to accurately balance the spring force (pressure) generated by the slider, which pressure is close to the limit of automatic locking of the slider. In accordance with the inclined direction of the slider supporting surface, separation of the spring force of the slider and the solder material forming section is generally realized. The slider, which develops along the rim of the housing, melts the solder material form and is separated and freed due to spring movement from the rim. The slider moves back due to the compression spring mounted on a spring supported at the inner housing wall.

It is arranged on the red plastic part of the slider as a signaling element at the rear of the plug, swinging out of the plug according to the movement of the slider, and clearly showing the tripping state.

Current protection is realized by fuses or temperature-dependent resistors.

On the other hand, only the housing and a few separate parts allow the plug to be automatically manufactured at low cost.

Further advantages of embodiments of the invention are described in the other dependent claims.

Hereinafter, the present invention will be described in more detail with reference to embodiments of the protective plug shown in the drawings.

The protective plug relates in particular to a voltage surge protective plug for a telecommunication device connected with the terminal block.

1 is an exploded view of the components of the protective plug. As shown in FIG. 1, the protection plug has a lower side closed by a printed circuit board 2 having an external housing 1, a voltage surge breaker 3, a fuse element 26, and a compression spring 8; A slider 4, a solder material shaping portion 7, a signaling element 5 and a ground plate 27 are provided. The protective plug is connected to the ground rail 34 of the connector block, which is not shown by the ground plate 27 but is the ground of the protection system (FIG. 3).

FIG. 2 shows a perspective view of a slider 4 comprising a support 9 and a blade-spring 14 one side interconnected by a connection 18. The support part 9 comprises two opposing bent connecting wings 10 which are located on the remaining surface 28 of the printed circuit board 2 (FIG. 5) in the operating state (no voltage surge), The remaining surface has no electrical connection to the signal path. If a voltage surge appears for a longer period of time (e.g. in the case of power crossover), the connecting wing 10 is connected to the printed-circuit board 2 with the slider 4 included in the signal (figure 5). It moves to face 29 and is replaced. By this movement, the lines a and b (FIGS. 1, 3, 5) are grounded, and the voltage surge flows.

The support 9 comprises a receiver 11 (FIGS. 1 and 4) for the helical spring 8 supported on the inner housing wall 31 (FIG. 4), the housing of the protective plug 1 The spring force of the slider 4 inserted into) is blocked. By means of the connection surface of the support 9, the electrical surge is established between the slider 4 and the ground plate 27 and the guide plate 6 at the voltage-surge circuit breaker 3 (FIG. 3). It flows to the ground rail 34 of the terminal block, not shown, and the voltage surge breaker 3 is completely connected to ground.

At the rear end of the support 9 the groove 13 serves to receive the signaling element 5 (FIGS. 1 and 4). The blade spring portion 14 is a resilient end 15 and a curved web 16 on the spring arm 30 and the support portion 9 and the bent stop portion 19 behind the connecting portion 18 of the blade spring portion 14. Is formed. The web 16 supports the brazing material form 7 and is provided as part of the curved support surface 17. The support surface 17 of the slider 4 is supported at the end 20 of the housing 1 (FIG. 3), so that the slider 4 is operated on the solder material shaped portion 7 by the self-locking force in the operating state. A predetermined force can be applied to the brazing material, and the brazing material shaping portion 7 supports the spring arm 30. Only in the case of low pressure surge, when the solder material form 7 melts, the support surface 17 slides off the rim 20 of the housing 1, and the slider 4 moves and flows to ground. Signaling in case of surge occurs.

For proper operation of the slider 4, the edges of the housing 1, as well as the spring movement range of the blade-spring portion 14 and thus the connecting force during the preloading of the brazing material form 7, The dimension of the inclined direction of the support surface 17 combined with 20 is of great importance.

The groove 13 in the support 9 acts to swing the signaling element 5 outside the hole 32 of the housing wall 33 (FIG. 4) when the slider 4 moves back.

The slider 4 is a device which plays the most important role of the protective plug, and realizes a short circuit and its signaling.

The operation mode of the protective plug based on FIGS. 3 to 6 will be described below.

The side view of the protective plug opened in accordance with FIG. 3 shows the design structure of the working element of the protective plug.

The housing 1 is closed down by the printed circuit board 2. The printed circuit board 2 moves the voltage surge breaker according to the guide plate 6 attached to the circuit board, and the ground plate 27 on the upper part of the housing 1 and the terminal block to ground not shown. The voltage surge breaker 3 is connected to the ground rail 34.

The slider 4 is connected to ground by the contact surface 12 (FIG. 2) on the ground plate 27, and the solder material shaping portion 7 is connected to the guide plate 6 of the voltage surge breaker 3. FIG. . When the voltage surge breaker 3 is heated, heat is transferred onto the guide plate 6 welded to the brazing material form 7. The brazing material shaping portion 7 is a material as described above, and the spring force (pressure) of the slider 4 is precisely balanced. The slider 4, which is used as a safety device structure for the optical signal of the voltage surge, has the edge 20 of the housing 1 and the blades of the slider 4 when the solder material shaping part 7 is melted by heat effects. It opens and closes through the spring movement of the position defined by the support part 17 on the spring part 14. Because of the compression spring attached to the slider (as described above), the slider 4 moves backwards, i.e. away from the position of the voltage surge breaker, the compression spring being moved to the inner housing wall 31 (FIG. 4). Is supported by The two connecting wings 10 provided on the slider 4 (FIG. 4) are replaced by the movement of the slider from the remaining surface 28 to the two connecting surfaces 29 (FIG. 5). The connection surface 29 is each contact of telephone lines a and b. By the connecting wings 10 provided on the slider 4, the lines a and b are connected to ground.

The voltage surge breaker 3 is connected to ground in a short circuit state after tripping of the safety device structure. The connection of the terminal block (not shown) with the ground rail is realized by the welded guide plate 6 and the ground plate 27. In the untripped state, the ground is also connected to the voltage surge breaker 3 on the brazing material shaping portion 7 and the guide plate 6.

At the rear of the plug, the red signal element 5 (FIG. 1) is arranged and supported respectively on the slider, and swings or rotates out of the plug according to the movement of the slider, respectively. 21 (the semi-circle inner surface according to the bearing) is provided to the housing 1 at a rotation point set outside the surface 22 of the signaling element 5, and the pin 23 is provided with a slider 4 (FIG. 1). And groove 13 in FIG. 4).

Current protection is realized through SMD connected by solder pads 25 (FIGS. 3, 5, 6). The solder pad 25 is completely plated toward the lower side of the printed circuit board 20 (FIG. 6).

A fuse cap (not shown) is accessible from the outside with a measuring tip and serves as a measuring taping position for each line.

Claims (4)

In an overvoltage protection plug for a telecommunication device having a printed circuit board, a voltage-surge circuit breaker, a slider, a spring, a ground plate and a housing with signaling elements, the slider 4 is supported by a spring 8 and a support surface; A protective plug, characterized in that it is preloaded to the rim of the inner housing wall of the housing (1) and the solder material shaping portion (7) is loaded to the minimum range only by the spring force (pressure) of the slider (4). 2. The voltage-surge circuit breaker according to claim 1, wherein the slider (4) is grounded with a support (9) having an opposite curved bent wing (10), a receiver (11) of a spring (8), and a ground plate (27). And a blade-spring portion 14 having a connection surface 12 to be connected with (3), a groove 13 for holding the signaling element 5, and a long spring arm 30, and the blade-spring Part 14 is a protective plug, characterized in that the resilient end portion (15) is bent to form a web, the brazing material shaped portion (7) is arranged thereon, and the support surface (17) is bent. The signal of claim 1, wherein the housing (1) is supported by a bearing portion (21) as a fixed position of rotation with respect to the outer circumferential surface (22) of the signaling element (5) and a groove (13) of the slider (4). A protective plug, characterized in that the pin 23 of the pixel ruler 5 is provided. The printed circuit board (2) according to claim 1, wherein the printed circuit board (2) provided with a circuit track on another side is plated through a portion of the SMD solder pad (25), and the voltage-surge circuit breaker (3) provided with a guide plate (6). And a fuse element (26).