JP4695654B2 - Pluggable combination device especially for protection against overvoltage - Google Patents

Abstract

The invention relates to plug-in combination of devices, especially for overvoltage protection, which comprises a pedestal-type base and one or more plug-in modules, said modules receiving the overvoltage protection elements, and which further comprises contact elements and mating contact elements that are disposed in the base and in the plug-in module, and mechanical detent or snap-in elements that are effective between the respective plug-in module and the pedestal-type base. The detent or snap-in function can be cancelled out for replacing the plug-in module. The invention is characterized in that the plug-in module comprises a support unit having an understructure. A plurality of large-surface contact elements are provided on the understructure. The understructure has a trough-shaped bottom side from where stop edges, stop surfaces and/or stop pins extend downward into the direction of the pedestal-type base. The support unit is enclosed by a cover, said cover having at least one hinge area on at least one side thereof. Said hinge area gradually verges into a pressure plate and actuates a detent insert comprising detent projections or detent knobs.

Description

  The invention comprises a pedestal lower part and one or more plug modules as described in the premise of claim 1, the plug module containing an overvoltage protection member, A pluggable combination device, in particular for protection against overvoltages, comprising a contact member and a contact counterpart arranged respectively in the lower part and the plug-in module.

  Prior art overvoltage protection devices are often constructed as pluggable combination devices that include a lower portion and a plug-in module.

  In the lower part, a connection terminal for contacting the electrical conductor is arranged and there is a corresponding housing for the plug-in module to be inserted. Furthermore, the lower part encloses one or more plug contacts of the plug-in module so as to provide the desired mechanical and electrical contact and corresponding retention of the plug module in the lower part. The member is accommodated.

  The plug-in module has a natural overvoltage protection member such as a spark gap, a varistor or a gas arrester.

  The lower part is configured as a U-shaped body in many cases, the open leg of the U-shaped body surrounds the plug module from the side, and the plug module connects the U-shaped part. Rest on the legs. Furthermore, the lower part has a housing member on its mounting side that enables so-called hat rail mounting.

  As explained briefly, the advantage of sharing the function between the lower part and the insertion module is that the insertion module can be taken out at the time of inspection work and maintenance work, so that the connection terminal can be opened, There is no need to switch so that the corresponding equipment is not energized.

  Then, the removed and separated plug-in module can be inspected by using a dedicated inspection device outside the electric equipment, and can be replaced or used again in some cases.

  Regarding the prior art, reference is made, for example, to German Patent No. 3639533C2, German Utility Model Application Publication No. 29159313, German Patent No. 10001667C1 and German Utility Model Application Publication No. 202004006227U1.

  As a special problem with the construction of the plug contact structure between the lower part and the plug module, in preparation for currents of 10/350 μs and 8/20 μs passing through it during lightning protection, or short-circuit current at the net frequency It should be noted that it must be designed structurally in preparation.

  In particular, in the overvoltage / lightning current arrester required in the market, a significant inrush current of up to 100 kA must be passed several times through such contacts almost without ignition or wear. Tests similar to this have been established in product standards for overvoltage protection devices.

  Therefore, in order to reliably control such a large inrush current, the contact force between the individual contact members must be selected very large. This leads to the fact that the plug-in modules according to the prior art cannot be removed without applying high forces and in many cases without the use of dedicated tools. This means that additional tools are required, which is a significant disadvantage for the use of the device. Moreover, there is an additional potential danger that an unexpected accidental arc may occur inside the arrester during handling with the tool, resulting in harm to humans and equipment.

  If the contact force between each contact member is designed to be low, it can facilitate the removal of the plug-in module, but it is subject to the influence of electrodynamic force action during the inrush current process. Thus, the plug-in module may unexpectedly pop out from the lower part, so that there is a risk that the proper overall functioning of the device cannot be performed unless other protective measures are taken.

  From PCT International Patent Publication No. 95/12905 pamphlet, a combination of a device base and an insertion member is known, in which case the insertion member is, for example, an overvoltage protection device. The device pedestal of this document has a substantially U-shaped configuration as seen in a side view, and both leg portions of the side portion forming the U-shape have connection terminals for lead-in lines. And a connection terminal for the ground line and other auxiliary contact terminals. On the back side of the device pedestal, a device for attaching it to the mounting rail is provided. The insertion members are housed between the side parts of the respective device bases and are fixed there by locking projections provided on both sides of the insertion member which are locked behind all the locking projections on the device base. The Further, the device pedestal web is provided with a resilient contact, which is contacted by a stationary contact tongue provided on the insertion member when the insertion member is locked to the device pedestal. Touch.

  The known structure of the combination of the device base and the insertion member is constructed so that the insertion member can be replaced without removing the device base. In the above-described prior art, the locking protrusion provided on at least one side wall of the insertion member facing the inner surface of the side portion of the device base is joined to the corresponding locking portion on the device base by locking. However, if the locking lug is formed directly on the tongue-like elastic part of the insertion member, the holding force is not sufficient. The inrush current generated by the lightning current arrester leads to a force that is high enough to cause the insertion module to come out of the support unit even if the insertion module is locked to the support unit.

  Accordingly, an object of the present invention based on the above is to provide an improved pluggable combination device, particularly for protection against overvoltages, comprising a pedestal-shaped lower part and one or more plug-in modules. This combination device, on the one hand, can pass significant inrush current without ignition or wear, and on the other hand, the plug-in module in the lower part of the pedestal is securely locked. And can be loosened and removed easily, i.e. without auxiliary means or special tools.

  The solution to the problem of the invention is achieved by a combination of elements based on the teachings of claim 1, and the dependent claims contain at least advantageous embodiments and developments.

According to it, the important point of the basic idea of the present invention is to share the functions between the module of the electrical plug-in contact system and the module of the locking unit and use a special separate locking insert. .
A locking unit with a locking insertion part locks the plug-in module in the desired final position.

  When the plug-in module is to be removed, the locking of the locking unit is released by a simple manual force action. In one embodiment, the plugging module can be withdrawn from the lower portion without applying a significant tensile force using the mechanical force action released from the mechanical energy store.

  The design of the functional groups described above can be varied over a wide range and can be optimized accordingly. For example, in principle, it is conceivable to design the extrusion force so that the plug module is automatically pushed out of the plug contact. Similarly, mechanical adaptation can be performed so that the plug-in module can be pulled out without applying too much force.

  The main advantage of the present invention lies in that the original contact system, that is, the design form of the contact member and the contact corresponding member, can be optimally designed in accordance with the function for suppressing the inrush current.

  In other words, in embodying the basic idea of the present invention, regardless of the force that keeps the contact member and the contact-compatible member connected by shape joining and / or friction joining when the insertion module is inserted, After a general separation, a dedicated mechanical locking member or snap-fit member acting between each plug-in module and the pedestal lower part is provided.

  The locking function or snap-fit function can be eliminated without mechanical assistance when it is desired to replace or to check each plug-in module.

  In one embodiment, a stress is applied between each lower module and the insertion module when each insertion module is inserted, and the insertion module is pedestal when the locking function or snap-fit function is released. A spring-like mechanical energy accumulator is provided that releases mechanical energy to disengage from the lower part of the shape.

  The plug-in module includes a support unit having a bottom surface group, and a plurality of contact members having a large area are arranged in the bottom surface group.

  Furthermore, the bottom surface group has a water tank-like lower surface, and a stopper edge, a stopper surface, and / or a stopper pin extend downward from the lower surface toward the pedestal-shaped lower portion.

  The support unit is surrounded by a hood, and the hood has a hinge surface on the opposite side. The hinge surface has shifted to the pressing plate. A separate locking insert is provided with a locking lug or locking cam that performs a locking function or snap-fit function on the side portion.

  The hood can be embodied as a plastic molding and the hinge surface may be a so-called film hinge joint. The hinge surface with the pressing plate is usually under initial stress so that the locking lug or locking cam of the locking insert takes the maximum outer position. By means of a light force action on the pressing plate, each locking insert can be moved so that its locking lugs or locking cams approach each other, i.e. in the direction of the inner surface of the hood, and complementary in the lower part of the pedestal It can be released by moving out of the notch.

  The support unit described above accommodates the original overvoltage protection member. A surface or edge for restricting the movement of the pressing plate is formed on the support unit below the pressing plate of the hood.

  In the region of the bottom surface group of the support unit, there is provided a locking projection that engages with a complementary notch of the hood while locking it.

  The hood has two wide side surfaces facing each other and two narrow side surfaces facing each other, and has a pressing plate on the short side.

  The hood notch is preferably located in the lower region of the wide side.

  The outer surface of the pressing plate is structured for easier operation of the pressing plate and for withdrawing the plug-in module from the lower part.

  The locking lugs or locking cams, in particular provided in pairs, of the locking inserts may have wedge-shaped sliding surfaces or bevels, each wedge-shaped point being directed in the direction of insertion. Yes. During the insertion process, the wedge-shaped sliding surface slides along the surface of the lower part of the base, releases the stress of the pressing plate and engages with the notch provided there.

  The bottom group may be provided with members that release the coding pins and / or telecommunications contacts.

  In one aspect of the present invention, the hood has a shape that extends in a wedge shape over the entire width of the hood. Furthermore, in this aspect, the hood has a spherical or arcuate shape on its upper surface.

  The lower part of the combination type device has a U-shape, and a locking member or a snap-fit member is arranged on an open leg part of the lower part, and the connecting leg part may be one or Includes a plurality of spring-like mechanical energy accumulators and notches for its operation.

  Furthermore, the open legs may have longitudinally extending guide rails for easy insertion of the plug-in module. This guide rail may also have a coding function to allow insertion in the correct orientation as defined, thereby avoiding such an incorrect attachment to the lower part. it can.

  The connecting leg of the lower part has a shape complementary to the lower surface of the bottom group, and the lower side of the connecting leg is for the stopper edge, stopper pin, or stopper surface of the bottom group. There may be a notch for each one spring unit, including the access part upwards.

  Each spring unit is preferably supported against the bottom surface of the pedestal lower part. The springs of the spring unit can be exchanged, so that the unified design concept of the lower part can be easily adapted to the respective use case with regard to the initial stress and the pushing force.

  The connecting leg is provided with at least one notch for the coding pin or for access to the telecommunication contact.

  A plurality of locking members or snap-fit members and a plurality of mechanical energy accumulators that are possible as one configuration are provided and are preferably arranged symmetrically.

  The connecting legs of the lower part have one integrally formed web on each side, which stabilizes each part of the open legs facing each other and inserts the plug-in module. Eliminate the risk of parts being pushed away.

  Each plug-in module with the hood upper part and the press plate on it protrudes when plugged in, so it is good for manipulating the press plate for the purpose of taking out the plug-in module It remains accessible.

  The contact member and the contact-corresponding member, one on the plug-in module and the other on the lower part, are constructed as plug connections with a large contact holding force that is resistant to inrush current, provided that the contact holding force is It is not primary or must be mechanically locked in the lower part at the same time.

  Next, the present invention will be described in detail using embodiments with reference to the drawings.

  As is clear from FIG. 1, the plug-in module 1 includes a support unit 4 and a hood 5.

  Under the hood 5 or on the support unit 4, the lightning arrester's original active components are electrically connected to the plug-in contacts 2.

  The plug-in contact 2 is manufactured as a metal block with a large area and is preferably arranged symmetrically on the opposite side.

  The hood 5 has an operating surface 6 ′ made as a pressing plate 6 at both end surfaces.

  Since this pressing plate is arranged so that it can be moved on the upper surface by a mechanically configured hinge surface 7, it can be incorporated into the structure of the hood member at a low cost.

  When a mechanical force action is generated on the operation surface 6 ′, the operation surface moves inward, and at this time, the stopper plate 8 of the support unit 4 can function as a path restriction portion.

  The available path of the pressing plate 6 is adjusted so that the locking lug 9 moves out of its corresponding member 9 '(see FIG. 2), thereby releasing the locking.

  Overall, in the illustrated embodiment, two locking lugs 9 are provided on each end face, so that the plug-in module 1 is provided with a total of four fixing points, thereby achieving a corresponding balance. It is held at a desired position without delay.

  Due to the structure provided on the surface of the operation surface 6 ′, the insertion module 1 can be easily taken out without applying excessive force.

  Furthermore, the lower surface of the support unit 4 manufactured as a water tank-like bottom group has coding pins or telecommunication operation contacts 100.

  A stopper edge, a stopper surface, or a stopper pin 10 that acts as a pressing point for the corresponding spring unit 11 (FIG. 2) extends from the lower surface of the bottom surface group described above.

  The support unit 4 has a locking projection 110 that engages and locks the complementary notch 111 of the hood 5 in the region of the bottom surface group.

  The locking lug 9 of the locking insert 200 (see FIGS. 4 to 6) is manufactured as a bevel or sliding surface 112, with each wedge-shaped point pointing in the direction of insertion.

  As is apparent from the drawings, the hood 5 is manufactured to extend in a wedge shape in the lower region, and the upper surface of the hood 5 has a spherical or arcuate shape.

  Each plug-in module 1 preferably comprises two or four symmetrically arranged plug-in contact members 2. By configuring the plug-in contact member 2 as a movable part or a fixed part, it is possible to pass a relatively large inrush current through a contact member having a large area with almost no wear. The arrangement of the individual plug contacts evenly distributed on the bottom surface ensures an even and uniform force distribution, so that even if a large electrodynamic force is generated, the deformation may occur or the difference inside the lower part Module does not tilt.

  The lower part of the combination device is U-shaped according to the drawings of FIGS. In this case, the lower part 12 has two open U-shaped legs 120 and one connecting leg 121.

  The above-described notch 9 ′ for the locking lug 9 of the locking insertion part 200 of the plug-in module 1 is formed in the open leg 120 of the lower part 12.

  The connecting leg 121 has one or more spring-like mechanical energy accumulators and a notch 122 for its operation.

  The open leg 120 has, in one embodiment of the invention, a guide rail 13 for easy and accurate insertion of the respective plug-in module 1.

  Furthermore, the connecting leg 121 has a shape complementary to the lower surface of the bottom group of the insertion module 1 on its upper surface, and a stopper for the bottom group of the insertion module 1 on the lower side of the connecting leg. A receiving portion 123 for each spring unit 11 is provided, which includes an access portion for the edge 10 facing upward.

  As can be seen from FIGS. 2 and 3, each optional spring unit 11 including at least one coil spring is supported on the bottom surface of the lower part of the base.

  Further, the connecting leg 121 is provided with at least one notch 124 for the coding pin or as an access part to the telecommunication contact.

  In order to reinforce and stabilize the overall configuration of the lower portion, the connecting leg 121 has webs 125 integrally formed on both sides.

  In the inserted state (see FIG. 3), the plug-in module 1 is kept accessible to the upper part of the hood and the pressing plate located there.

  The plug module 1 is inserted into the lower part 12 while being guided by the guide rail, and is applied while the desired electrical contact is established between the corresponding plug contact 2 and the corresponding member of the lower part. The mechanical force is used to apply an initial stress to the mechanical energy store 3 or spring unit 11 in the lower part 12.

  This is embodied by the corresponding stopper edge, stopper pin or stopper surface and by the pressing point provided there.

For example, in each lower part 12, in particular four spring units 11 are incorporated. This number and symmetrical positioning ensure the best uniformity of force action.
Through a specific design and construction of the mechanical energy storage device 3, in particular, through selection of an appropriate spring member and its spring characteristics, the pushing force to be set and the pushing distance associated therewith over a wide range Can be changed.

  When pressure is applied to the pressing plate 6 or the operation surface 6 ′ and the locking lug 9 is released from the notch 9 ′, the locking lug 9 does not come into contact with the notch 9 ′. As a result, the plug-in module 1 can be taken out using mechanical energy stored in the spring unit without using any other mechanical auxiliary means or tool.

  The structure and functional form of the locking insert according to the invention for obtaining a particularly secure and mechanically robust locking connection will be described in detail with reference to FIGS.

  6 has two beveled or wedge-shaped surfaces 112 arranged on the connecting web 201 on the front side (right side drawing).

  An indentation 202 is provided in a space region between each inclined surface or wedge-shaped surface 112, and a locking edge 203 extending substantially parallel to the connecting web 201 is integrally formed on the lower surface thereof.

  The connecting edge has a height dimension larger than that of the connecting web 201 in order to securely fix the locking insert 200 shown in the drawings of FIGS. 4 and 5 with the support unit.

  Starting from the locking edge 203, there are flexible fixing clips 204 on both sides of the indented portion 202. The fixing clip 204 has an inclined position starting from the rear side surface (the drawing on the left side of FIG. 6) of the locking edge 203 and has a height larger than the length of the inclined surface or wedge-shaped surface 112.

  The locking insertion component 200 has its connecting web 201 and locking edge 203 accommodated in the gap 205 of the support unit 4 of the insertion module 1 and fixed by the hood 5.

  The securing clip 204 supports the locking insert 200 against the inner surface of the support unit 4, as can be seen in particular in the drawing of FIG. 5.

  The pressing plate 6 has a notch 206 in the region of the bevel or wedge-shaped surface 112 and at least one tongue 207 that engages the indented portion 202 of the locking insert 200 for its operation.

  The locking insert 200 is held and fixed by a flexible fixing clip 204 at a position in the gap in the side portion of the support unit 4 under initial stress.

  In the region of the indentation 202 of the locking insert 200, a reinforcement 208 may be provided to ensure sufficient mechanical stability.

  The locking insert 200 is preferably integrally manufactured as a plastic injection molded product or a plastic press molded product. If one of the bevel or wedge-shaped surface 112 is damaged, or if it is damaged, the hood 5 can be removed and the locking insert 200 can be replaced so that the plug-in module can continue to be used. .

  The force against the plug-in module is received by the support unit 4 and transmitted to the locking insert 200 in the region of the connecting web 201, and when the locking connection described above is carried out, To the notch 9 '.

Fig. 3 is a three-dimensional drawing showing a plug-in module according to the invention with the hood covered (left half of the figure) and with the hood removed so that the support unit can be seen (right half of the figure). FIG. 4 shows a U-shaped lower part including a detailed view of a spring unit. 1 shows a fully pluggable combination device with an inserted plug-in module and a detailed view of a mechanical energy store when the module is fully plugged and in the pedestal part. FIG. 6 shows the plug-in module with a hood, clearly showing a locking insert with a bevel or wedge-shaped surface for establishing a locking connection with the notch in the lower part. FIG. 4 is a detailed view of a fixed locking insert, with the hood and pressing plate partially broken away. It is a different drawing which shows a latching insertion component.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Plug-in module 2 Plug-in contact 3 Mechanical energy storage 4 Support unit 5 Hood 6 Press plate 6 'Operation surface 7 Hinge surface 8 Stopper plate 9 Locking lug 9' For locking lug of lower part Notch 10 Stopper edge or pressing point 11 Spring unit 12 Lower part 13 Guide rail 100 Coding pin / electrical communication contact 110 Locking member of bottom group of support unit 111 Cutout of hood 112 Wedge-shaped slide of locking lug Moving surface 120 Open leg of lower part 121 Connecting leg of lower part 122 Notch as access to spring unit 123 Receiving part of spring unit 124 Notch for coding pin and / or electricity Access point to communication contact 125 Web 200 Locking insertion part 201 Connecting web 2 2 dimple 203 locking edge 204 fixed clip 205 gap 206 notch 207 tongue 208 reinforcement portion

Claims (19)

A pedestal lower part and one or more plug-in modules, the plug-in modules containing overvoltage protection members;
Further, an insertion contact member arranged in the insertion module and electrically connected to the overvoltage protection member, and an insertion contact arranged in the lower part and inserted and electrically contacted with the insertion contact member a corresponding member, said and a mechanical locking member or snap members acting between the plug modules and the base form of the lower part, pluggable combination type for protection against overvoltages in Japanese In the device
The insertion module includes a support unit having a bottom surface group, and the plurality of insertion contact members having a large area are arranged in the bottom surface group,
Furthermore, the bottom surface group has a semi-cylindrical lower surface, and a stopper edge, a stopper surface, and / or a stopper pin extends downward from the lower surface toward the pedestal-shaped lower portion,
The upper surface and the side surface of the support unit are surrounded by a hood,
The hood includes a pair of pressing plates that are connected via a hinge portion and cover a pair of side surfaces facing each other of the support unit,
By moving the pressing plate inwardly with the hinge portion as a fulcrum, a locking insertion part including a locking lug or a locking cam as the locking member or a snap-fit member is configured to be operable,
The locking insertion component includes an indented portion with which a tongue provided at a lower end of the pressing plate engages, a connecting web extending from the indented portion to both sides, and a slope or a wedge-shaped surface respectively disposed on the connecting web. The locking lug or locking cam manufactured as follows, a locking edge extending substantially parallel to the connecting web on the lower surface of the indented portion, and provided on both sides of the indented portion starting from the locking edge And a flexible fixing clip are integrally molded ,
Before SL insertion locking part, characterized in that the locking edge and the connecting web is fixed by the hood is housed in the gap of the side portion of the support unit, pluggable combinational apparatus.   2. The pluggable combination apparatus according to claim 1, wherein the fixing clip supports the locking insertion part with respect to an inner surface of the support unit. 3. The pressing plate is engaged with a notch in the region of the slope or wedge-shaped surface of the locking insert and engages the locking insert with the indented portion of the locking insert . 3. The pluggable combination device according to claim 1 or 2, further comprising a tongue portion.   Any one of the preceding claims, characterized in that the locking insert is held in a position in the gap in the lateral part of the support unit under initial stress by the flexible fixing clip. The combination type apparatus which can be inserted as described in item 1. A spring unit is provided between the lower portion and the plug-in module, and the spring unit is subjected to compressive stress when the plug-in module is inserted, and the lock or lock of the lock member is also applied. The elastic energy for removing the insertion module from the lower part of the pedestal shape is released when the snap-fit of the fitting member is cancelled, according to any one of the preceding claims. Combination type device that can be plugged in. Wherein the area of said bottom surface groups of the support unit, wherein the locking projection corresponding engaging the notch of the hood so as to lock the hood is provided, of the claims The combination type device according to any one of the preceding claims.   The pluggable combination apparatus according to any one of the preceding claims, wherein the hood has a wide side surface and a narrow side surface that face each other. The plug-in combination apparatus according to claim 7 , wherein each of the pressing plates is provided on at least one of the narrow side surfaces . The pluggable combination apparatus according to any one of the preceding claims, wherein an outer surface of the pressing plate has an uneven shape . The insertable combination mold according to any one of the preceding claims, characterized in that the hood has a shape in which the entire width of the hood becomes narrower toward the lower side. apparatus.   The pluggable combination device according to any one of the preceding claims, wherein the hood has a spherical or arcuate shape on an upper surface thereof. The lower portion has a U-shape having two open legs facing each other and a connecting leg connecting the open legs, and a locking member is attached to the open leg of the lower portion. or snap fit and is arranged member, connecting leg is characterized in that it comprises a notch for one or more of the spring unit and its operation, one of the claims 5 to 11 1 The combination type device which can be inserted according to the item. 13. The pluggable combination device according to claim 12 , wherein the open leg has a guide rail extending in an insertion direction for easily inserting the plug-in module. The connecting leg has a semi-cylindrical shape in which the corresponding to the lower surface of the semi-cylindrical shape of the bottom group, the lower side of the connecting leg, the stopper edge of the bottom group, the stopper pin, or wherein the housing portion for the spring unit capable urge said stopper surface upward is provided, pluggable combination die according to claim 5 and claim 12 or 13 apparatus. 15. The pluggable combination device according to claim 14 , wherein the spring unit is supported against the bottom surface of the base-like lower part. The insertion according to any one of the preceding claims, wherein a plurality of the locking members or the snap-fit members are provided and are respectively disposed below the pair of pressing plates. Possible combination device. 17. The connecting leg according to any one of claims 12 to 16 , characterized in that the connecting leg has a web integrally formed on each side edge for reinforcing two open leg portions facing each other. Combination type device that can be inserted. The insertion module protrudes from the lower portion when the upper portion of the hood and the upper portion of the pressing plate are in the inserted state, and the pressing plate can be operated in the inserted state. A pluggable combination device according to any one of the preceding claims. For use in a pluggable combination type device according to at least one of claims 1 to 18, the plug module according to at least one item of the claims.

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