DE102006033274A1 - Plug-in device combination for protection against overvoltages - Google Patents

Abstract

The invention relates to a pluggable device combination for protection against surges, comprising a socket-like U-shaped lower part for accommodating at least one plug-type module (14) accommodating a surge protection element, wherein latching means acting between the plug-type module (14) and the socket-like lower part are provided which comprise, on opposite end sides (3) of the plug-type module (14), latching tabs which are formed on a hinge joint (1) under pre-stress and each engage in an associated latching cutout on the plug-type module (14), wherein the latching connection can be released by pressure being applied to the hinge joint (1) on the end sides (3) of the plug-type module. According to the invention, the respective hinge joint (1) is located in the transition region between the upper side and the respective end side (3) of the plug-type module (14), wherein the hinge joint merges with an actuating face (5) pointing towards the socket-like lower part. Formed on the lower end of the actuating face (5) is a hook-shaped latching tab (6), whose latching face (7) encloses an angle of less than 90° with the actuating face (5). Finally, the U limbs of the lower part each have a hook-shaped, recessed latching cutout (8), which is designed to be substantially complementary to the latching tab.

Description

The Invention relates to a pluggable device combination for protection against overvoltages, comprising a socket-like U-shaped Lower part for receiving at least one, an overvoltage protection element receiving Plug-in module, wherein between the plug-in module and the socket-like lower part acting locking means are provided, which are opposite End sides of the plug-in module on a biased Hinge joint formed locking lugs comprise, respectively in an associated Engaging recess on the base part, wherein the locking connection by pressing on the hinge joint on the front sides of the plug-in module is repealable, according to the preamble of Patent claim 1.

Overvoltage protection devices of the state of Technology will be in many cases as pluggable device combinations, comprising a lower part and a plug-in module, executed.

in the Lower part are terminals arranged for contacting the electrical conductors and corresponding Recordings for the plug-in module to be used. Furthermore, the lower part takes Elements on which one or more plug contacts of the plug-in module embrace so that the desired mechanical and electrical contact as well as the appropriate stop given the plug-in module in the lower part.

in the Plug-in module are the actual surge protection elements, e.g. Spark gaps, varistors, gas arresters or similar. The bottoms are in many cases as a U-shaped Body trained, wherein the open legs of the U-shaped body side of the plug-in module embrace and wherein the plug-in module on the connecting leg of the U-shaped Partly rests. Furthermore, the lower part has on its mounting side Mounting elements that allow so-called DIN rail mounting.

Of the Advantage of the briefly explained Separation of functions between lower part and plug-in module consists in that at Revision or maintenance work, the plug-in module are removed can, without that the terminals open or the corresponding system must be de-energized.

The Removed plug-in module can then outside the electrical system examined with the help of special test equipment and, if necessary, replaced or replaced.

With respect to the prior art, for example, the DE 36 39 533 C2 , the DE 295 19 313 U1 , the DE 100 01 667 C1 and the DE 20 2004 006 227 U1 directed.

When Problem with the design of the plug contact arrangement between the lower part and plug-in module is to be noted that this for the case of deriving via them flowing surge current the waveform 10/350 μs and 8/20 μs or mains frequency Kurschlußströme constructive is to be interpreted.

Especially for overvoltage lightning arresters, as the market requires, they must be substantial Surge currents from up to over 100 kA several times the corresponding contacts are almost burned and wear-free. Appropriate tests are anchored in the product standards for surge protection devices.

ever After the contact force between the contact elements, the Plug-in modules tool-free or removed only with the help of a tool become. If no additional activities be provided, there is a risk that under the influence of the electrodynamic Force effects during the Surge current process there is an unwanted jumping out of the plug-in module from the lower part can, so that one proper overall function of the device without further protective measures is not given.

From the WO 95/12905 a solution is previously known, which also comprises a U-shaped lower part for receiving at least one, an overvoltage protection element receiving plug-in module and wherein acting between the plug-in module and the base-like base locking means are provided. At the opposite end faces of the plug-in module formed on a hinge joint locking lugs are present, which each engage in an associated latching recess on the plug-in module, wherein the latching connection by pressure on the hinge joint, which acts on the end faces of the plug-in module, can be canceled.

The hinge joint of the previously known solution is located at the bottom of the plug-in module and the pressure surface is located by a small amount above the locking lugs on the end faces of the module. In order to be able to act on the latching lugs or the pressure surfaces with a compressive force, it is necessary to provide recesses in the region of the U-shaped lower part. The pressure surfaces of this prior art are very small and the necessary recesses or depressions in the lower part is a very disadvantageous, heavy gripping the plug-in module required. Due to the arrangement of the actual hinge on the lower side of the plug-in module, a very large pressure path is required to cancel the latching. Furthermore, the locking surface of the locking lug on the plug-in module and the return in the lower part are parallel, so that at Vibration or vibration there is the possibility of unwanted unlocking.

Out The above object of the invention, a further developed pluggable device combination for protection against overvoltages, comprising a socket-like U-shaped Lower part for receiving at least one, an overvoltage protection element receiving Specify plug-in module, with a constructive and impact improvement the acting between the plug-in module and the socket-like lower part Rastmittel to be created.

The solution The object of the invention is achieved by the feature combination according to the teaching according to claim 1, wherein the dependent claims at least expedient embodiments and Represent further developments.

The pluggable device combination for protection against overvoltages, comprising a socket-like U-shaped Lower part for receiving at least one, an overvoltage protection element receiving Plug-in module has a special Rastmittelausgestaltung, in the the respective hinge joint in the transition region between the Top and the respective end face of the plug-in module is located.

The Hinge joint always goes into a socket-like base directed actuating surface over which designed much larger compared to the prior art.

At the lower end of the actuating surface is a hooked Detent nose formed whose locking surface an angle of less 90 ° with the actuating surface includes.

At long last The U-legs of the lower part each have a hook-shaped, undercut recess on, which is designed to be complementary to the locking lug.

By the position of the hinge joint with a pivot or hinge point in the The upper area of the plug-in module is when operating the lateral actuating surfaces in very easy way the necessary pressure force to cancel the locking connection produced. About that In addition, due to the huge size the actuating surface the unlocked plug-in module slightly upwards from the U-shaped lower part be pulled out.

By The constructive arrangement of the hinge is also only a lesser pressure path required, as mentioned above, the catch for to remove the pulling of the module.

The Rest area at the male part and the surface at return in the lower part have oppositely inclined surfaces, so that the catch and the return interlock each other and thereby self-locking the locking connection given is. To improve the handling when pulling the plug-in module show the surfaces the respective actuating surface a Structuring on.

The lower ends of the plug-in module have converging, conical end sections, allowing for easier insertion of the module even under unfavorable Installation conditions can be done.

The Insides of the legs of the U-shaped socket-like lower part have a conical front side sections complementary Shape.

The Hinge joint has the operability in the region of its pivot point improving attenuation section on, which can be formed as a joint inside groove.

To the Purpose of easier introduction the plug-in module in the lower part in particular in the area of resulting latching, the hook-shaped locking lug on a wedge-shaped sliding surface.

Of the Wedge angle of the sliding surface is less than or equal to the catch surface angle, i. the angle between the locking surface and the actuating surface.

At each directed to the plug-in module, a part of the recess forming leg of the lower part beyond a radius of curvature is formed, to facilitate the insertion of the module in the lower part.

The Actuating surfaces are also freely accessible in the plugged, latched state of the plug-in module. The provision of any depressions or recesses on the lower part not necessary.

The Invention will be described below with reference to an embodiment and below With the help of figures closer explained become.

in this connection demonstrate:

1 a side view of a plug-in module with partially broken representation in the region of the actuating surface and the latching lug;

2 a detailed view of the hinge joint and the latch and the Rastausneh latched state, ie when the plug-in module is completely and correctly in the lower part, and

3 an overall view of the located in the lower part, fully inserted and latched plug-in module.

The plug-in module 14 according to the figurative representations consists of a housing, wherein the housing accommodates inside surge protection elements, such as varistors. In the lower part known plug contacts and a guide or coding pin are formed.

The front ends 3 of the plug-in module 14 have actuating surfaces 5 on that in a hinge joint 1 pass. The respective hinge joint is located in the area of the top 2 of the plug-in module 14 ,

At the bottom of the actuating surface, which is an extended section of the hinge joint 1 represents, is a hook-shaped latch 6 available.

The locking surface 7 the latch 6 closes with the surface of the actuating surface an angle of preferably less than 90 °.

To improve handling, the actuating surface 5 a surface structuring 9 on.

To the compressive forces acting on the actuating surface 5 are to exercise to release the locking connection, reduce, is in the hinge joint 1 formed a joint inside groove as a targeted weakening.

Like from the 2 can be seen, the hook-shaped locking latches 6 in a recess 8th of the lower part 4 when the plug-in module 14 in the correct, inserted state.

To facilitate engagement, has the hook-shaped locking lug 6 a wedge-shaped sliding surface 11 on. Likewise, in the area of the recess 8th a rounding radius 12 educated.

When inserting the plug-in module 14 comes the wedge-shaped sliding surface 11 with the surface of the radius of curvature 12 in contact. As a result, shifts the hook-shaped locking lug 6 under stress of the actuating surface 5 and the hinge joint 1 starting from the illustration according to 2 to the left. Then, if the recess 8th is reached, the hook-shaped locking lug jumps back and there is a mutual hooking the opposite surfaces, ie the locking surface 7 and the corresponding surface of the recess 8th instead of.

From these statements it is clear that the hinge joint 1 is biased, for example due to appropriate selection of a plastic material of the corresponding housing part or a housing cap, which the hinge joint 1 , the catch area 5 and the catch 6 as an integral element.

As shown 3 has the plug-in module 14 on its underside conical end portions on to a slight insertion and a secure fit in the correspondingly complementarily shaped U-shaped lower part 4 to effect. The representation after 3 makes it clear in particular that the respective actuating surfaces 5 also in the plugged and locked state of the plug-in module 14 are freely accessible in order to be able to transmit enough forces after the detent connection by lateral pressure to the plug-in module 14 to extract from the U-shaped base-like base.

1

hinge

2

top plug-in module

3

front plug-in module

4

pedestal-like lower part

5

actuating surface

6

hook-shaped detent

7

Rest area

8th

recess

9

structuring

10

joint inside groove

11

wedge-shaped sliding surface

12

rounding radius

13

conical Front face sections

14

plug-in module

Claims (9)

Pluggable device combination for protection against overvoltages, comprising a base-like U-shaped lower part for receiving at least one, an overvoltage protection element receiving plug-in module, wherein acting between the plug-in module and the base-like base locking means are provided which formed on opposite end faces of the plug-in module on a hinged hinge hinge Include latching noses, which engage in each case in an associated latching recess on the plug-in module, wherein the latching connection can be canceled by pressure on the hinge joint on the end faces of the plug-in module, characterized in that the respective hinge joint ( 1 ) in the transition region between the top ( 2 ) and the respec end face ( 3 ) of the plug-in module ( 14 ), wherein the hinge joint ( 1 ) in a socket-like lower part ( 4 ) directed actuating surface ( 5 ), at the lower end of the actuating surface ( 5 ) a hook-shaped detent ( 6 ) is formed, the locking surface ( 7 ) an angle of less than 90 ° with the actuating surface ( 5 ) and the U-legs of the lower part ( 4 ) each have a hook-shaped, undercut recess ( 8th ), which to the detent ( 6 ) is formed complementary. Pluggable device combination according to claim 1, characterized in that the surface of the actuating surface ( 5 ) a structuring ( 9 ) having. Pluggable device combination according to claim 1 or 2, characterized in that the underside ends of the plug-in module ( 14 ) converging, conical end sections ( 13 ). Pluggable device combination according to claim 3, characterized in that the inner sides of the legs of the U-shaped base-like lower part ( 4 ) one of the conical end sections ( 13 ) have complementary shape. Pluggable device combination according to one of the preceding claims, characterized in that the hinge joint ( 1 ) has an operability improving weakening section, which is used as a joint inside groove ( 10 ) is trained. Pluggable device combination according to one of the preceding claims, characterized in that the hook-shaped latching lug ( 6 ) a wedge-shaped sliding surface ( 11 ) having. Pluggable device combination according to claim 6, characterized in that the wedge angle of the sliding surface ( 11 ) is less than or equal to the locking surface angle. Pluggable device combination according to one of the preceding claims, characterized in that on the respectively to the plug-in module ( 14 ), a part of the recess ( 8th ) forming legs of the lower part ( 4 ) a rounding radius ( 12 ) is shaped. Pluggable device combination according to one of the preceding claims, characterized in that the respective actuating surfaces ( 5 ) are freely accessible even in the plugged, locked state of the plug-in module.