CN207199392U

CN207199392U - Overvoltage protection device

Info

Publication number: CN207199392U
Application number: CN201720728769.4U
Authority: CN
Inventors: 李红军; 许年生
Original assignee: Dehn and Soehne GmbH and Co KG
Current assignee: Dence
Priority date: 2016-06-22
Filing date: 2017-06-21
Publication date: 2018-04-06
Anticipated expiration: 2027-06-21
Also published as: DE202016107504U1

Abstract

The utility model relates to an overvoltage protection device, it has piezoresistor, gas discharger and the hot disconnecting means of setting on loading board first side, and hot disconnecting means and piezoresistor ground heat contact closely. Each member is surrounded by an outer housing. The gas arrester is arranged on the second side of the carrier plate. The carrier plate has a through-opening, on the second side of which a pantograph is arranged, which at a first end is in electrical contact with the gas arrester and at a second end is connected by soldering to the connection contact of the varistor to form a thermal disconnection device. A pivot lever is formed, which is supported under tension of the spring element on the carrier plate stop, the path of movement of the pivot lever being locked by the soldered connection of the thermal disconnection device and being released as the solder melts, the pivot lever pulling the pantograph and turning into the disconnected position. According to the invention, the overvoltage protection device can be produced in a simple manner with few components, reduced installation space and at low cost.

Description

Overvoltage protection device

Technical field

It the utility model is related to a kind of overvoltage protection device, the overvoltage protection device, which has, at least one is arranged on n sides Plate-like piezoresistor, at least one gas discharger and at least one thermal cutoff devices on first side of shape loading plate, The thermal cutoff devices and the close thermal contact of at least one piezoresistor, wherein, aforementioned each component is by shell body Surround, and provided with for electrically connecting the mechanism with soldering on circuit boards.

Background technology

Known a kind of overvoltage protection device being located in housing from CN000204668940U, wherein, the equipment includes Multiple plate-like piezoresistors being spatially arranged in series.

It is disconnected to there is heat between at least two piezoresistors among the plate-like piezoresistor being spatially arranged in series Opening apparatus, the thermal cutoff devices and the close thermal contact of corresponding piezoresistor.

The series circuit spatially set in this place also includes gas-discharge tube.

It is corresponding adjacent pressure-sensitive due to being provided with thermal cutoff within the sandwich of each piezoresistor, therefore only Resistor can be monitored in terms of its thermal characteristics.The state of used gas discharger can not possibly be checked.This Outside, the known sandwich of each piezoresistor causes problem when reaching or ensuring required electrically separated spacing.

In principle, only can according to the heat energy of the piezoresistor to be monitored in terms of calorifics of cited prior art Do not transmit unsatisfactoryly and fast enough to thermal cutoff devices.

Known a kind of overvoltage protection device with multiple plate-like piezoresistors from DE102013005327A1.

These plate-like piezoresistors are arranged within the housing for surrounding hollow cavity and make electrical contact with conducting.

Known housing is configured to polygonal body, is especially configured to cube, cuboid or tetrahedron and has be used for The opening of plate-like piezoresistor is introduced, the piezoresistor is mechanical with the section or a part of case inside wall respectively Connect and recline in this place.Electrical contact conducting is able to carry out so as to which used piezoresistor is in parallel via the housing Connection.In addition, large area connection and related to this contact of the piezoresistor with housing sidewall provide good thermal transition, With the loss heat that sheds.

The equipment for according to DE3734214C2 prior art showing that there is piezoresistor, wherein, in order in piezo-resistance Piezoresistor is cut off from voltage source when device overheats, the contact surface and voltage source being arranged on two sides of piezoresistor Input connected with outlet line, and brazed portions are provided near piezoresistor in one of these circuits.The pressure Sensitive resistor is located in cup-shaped housing in itself, and the first contact surface of the piezoresistor is abutted on the inner side of housing bottom surface, And housing forms connector.Second side of the contact surface of piezoresistor is covered with megohmite insulant, wherein producing through insulation Material is until the connection electrically and thermally of brazed portions.The connecting portion of brazed portions and formation connector is in megohmite insulant On the surface of piezoresistor.The elastic contact tongue of the thermal cutoff equipment so formed is configured to helical spring, its In, the outer end of the helical spring connects via brazed portions to related connector, and the inner of the helical spring Portion connects to related engagement coupler.

Known a kind of overvoltage arrester from DE202009018118U1, it has at least one arresting element, for example pressed Sensitive resistor, and off device.Off device is used to separate one or more arresting elements with power network.Off device includes Thermal release position, the thermal release position are integrated into electrically connecting in path in discharger, wherein, via separated part on the one hand Moveable conductor section or moveable conducting bridge are connected with arresting element, and on the other hand by conductor section or bridge with First outside electrical interconnecting means connection of discharger.

This, which is externally provided with, produces pre-tensioned mechanism, such as spring.The force vector of spring is either directly or indirectly via removable Dynamic separation block is applied on conductor section or bridge along direction is disconnected.In the end of conductor section or the motion path of bridge or hold Be provided with conductive element in portion, the conductive element touched when off device triggers with conductor section or bridge joint and The conductive element is connected with outside second electrical interconnecting means, to form combiner.

In addition, according to the prior art, provided with moveable insulating element, the insulating element reach short-circuit condition it Immerse not long ago or when reaching short-circuit condition in the moving line of conductor section or bridge, to resist in conductive element and Electric arc between separated part is lighted a fire again.

According to DE3734214 can heat triggering off device in, switch element be configured to switch contact site.It is described to cut Changing-over contact portion closes piezo-resistance circuit via brazed portions in known manner.If trigger switch element, then closure is another One contact site, another contact site can be either as internal or external fault detectors or via corresponding outside Connection carrys out wiring as short circuit.

In the scope that component and component are integrated into circuit board plane more and more, set by overvoltage protection device Problem is produced when putting and be integrated into this electronic installation.Overvoltage protection device must be in terms of its structure space as small as possible Form and should be suitable for being directly installed on circuit board.In addition following necessity be present：Although size is small relative with packing density Height also maintains necessary electrically separated spacing.Finally, for protecting the thermal cutoff equipment known so far of over-voltage protection element at it It is configured in terms of overload enough sensitively, but the thermal source shadow by surrounding, other electronic building bricks or device should be excluded as far as possible Ring.

Utility model content

Therefore, it is to propose a kind of improved overvoltage protection device according to the above, the purpose of this utility model, it has There are the plate-like piezoresistor on the first side of at least one loading plate for being arranged on n sides shape and at least one gas discharger And at least one thermal cutoff equipment, the overvoltage protection device can be in a straightforward manner by few component, the structures reduced Space and it is made at low cost.Equipment to be achieved should be configured to compact component so that it can be used for being directly installed on electricity On the plate of road.In addition there should be following feasibilities：Represented by simple mechanism with signal：Whether the equipment works well and is It is no to have occurred and that thermal overload.

The solution of the purpose realizes have according to following combinations of features according to overvoltage protection device of the present utility model Have the piezoresistor of at least one plate-like being arranged on the first side of n sides shape loading plate, at least one gas discharger with And at least one thermal cutoff devices, the thermal cutoff devices and the close thermal contact of at least one piezoresistor, wherein, before Each component referred to is surrounded by shell body, and this is externally provided with for electrically connecting the mechanism with soldering, the mistake on circuit boards Pressure protection equipment is characterised by that at least one gas discharger is arranged on the second side of n sides shape loading plate, carries Plate has at least one break-through mouth of the connection contact site for piezoresistor, and conduction is provided with the second side of loading plate Bow, the pantograph on the first end with gas discharger make electrical contact with conducting and on its second end with piezoresistor Connection contact site by soldering connection to form the thermal cutoff devices, in addition form have be supported on from loading plate extension axle On pivot rods, the pivot rods are supported under the mechanical tensioning of spring element on the stop part of the loading plate, the pivot The motion path of bull stick is locked out and is released with the fusing of solder by the soldering connection of the thermal cutoff devices, Wherein, the pivot rods pull pantograph and are transferred in open position.

Therefore, such a overvoltage protection device is the utility model is related to, it, which has, at least one is arranged on holding for n sides shape Plate-like piezoresistor and at least one gas discharger on first side of support plate.Additionally it is provided with least one thermal cutoff Device, the thermal cutoff devices and at least one close thermal contact of piezoresistor.

Aforementioned each component is surrounded by shell body.Additionally it is provided with for outside electrical interconnecting means and for by the equipment The mechanism of soldering on circuit boards.

According to the utility model, at least one gas discharger is arranged on the second side of the loading plate of n sides shape.

Loading plate also has at least one break-through mouth of the connection contact site at least one piezoresistor.

On the second side of loading plate be provided with contact bow meaning on pantograph, the pantograph on the first end with gas Body discharger electrical contact conducting and couple contact site by soldering connection with piezoresistor with shape on its second end Into thermal cutoff devices.

Pantograph can be made up of the material of spring or still be subjected to spring force auxiliary in itself, more specifically exist In following meanings：Pantograph is maintained in its contact conduction position by soldering and described connect can be left in solder fusing Conduction position is touched, so as to which desired disconnection effect occur.

In addition, according to the utility model, the pivot rods being supported on from the axle of loading plate extension are formed.The pivot rods are excellent Choosing is plastic injection piece.

The pivot rods are supported on the stop part of loading plate under the tensioning of spring element.

The soldering connection locking referred in advance that the motion path of pivot rods passes through thermal cutoff devices.With melting for solder Change, the motion path is released, and pivot rods then pull pantograph and reach the open position referred to.Therefore pivot rods pass through Pull pantograph and be transferred in open position.

In improvement project of the present utility model, the end of the remote axle of pivot rods fills when performing pivoting action with communication The button put enters contact or discharges this button, so as to there is the simple feasibility that malfunction is represented with signal.

The end of the remote axle having been mentioned of pivot rods can have the surface structure or surface texture of special matched, so as to Operation button or release button as far as possible in the case of without prejudice to pivoting action.

In addition, the guide groove having for accommodating the end of spring element is formed in pivot rods or on pivot rods.

In addition, pivot rods also have drivening piece, the drivening piece fixes pantograph to drive motion.

It can be improved as follows according to overvoltage protection device of the present utility model：Second loading plate is provided with another piezoresistor, Wherein, moveable thermal cutoff dress is again provided with the side opposite with another piezoresistor of the second loading plate Put, the thermal cutoff devices have pantograph and pivot rods.

In the form of implementation of the present utility model, gas discharger is between each loading plate.Therefore layered cloth is produced Structure is put, the interlayer arrangement is included with piezoresistor, the first loading plate of gas discharger, with piezo-resistance The second loading plate and shell body of device, the shell body include cover and lower cover.

Preferably, the pivot rods of each thermal cutoff devices have the finger of taper respectively, and the finger is utilized positioned at limit Face at boundary's bow is applied under disconnection on gauge bow, to make gauge bow be transferred to the button of release communication device In position.

Brief description of the drawings

Below, the utility model is elaborated by embodiment and under the auxiliary of accompanying drawing.

It is shown in the drawings：

Fig. 1 shows the three-dimensional exploded view according to form of implementation of the present utility model of overvoltage protection device；

Fig. 2 a, 2b show in closing position (Fig. 2 a) and in open position the thermal cutoff devices of (Fig. 2 b) principle Figure；

Fig. 3 shows the detailed view of pivot rods；

Fig. 4 shows the Status view under released state according to equipment of the present utility model；

Fig. 5 shows to see that the gas discharger to loading plate and at this regards together with the equipment of pivot rods and pantograph Figure；With

Fig. 6 and 7 shows the side view in the case where saving housing according to equipment of the present utility model.

Embodiment

Fig. 1 shows the three-dimensional exploded view according to form of implementation of the present utility model of overvoltage protection device, and the overvoltage is protected Equipment is protected with two piezoresistors, a gas discharger and two loading plates in sandwich structure；

Fig. 2 a, 2b show in closing position (Fig. 2 a) and in open position the thermal cutoff devices of (Fig. 2 b) principle Figure, wherein, the single-piece of overvoltage protection device is saved for ease of identification；

Fig. 3 shows the detailed view of pivot rods 7, and the pivot rods have drivening piece 20 and the tapered finger 21 of taper；

Fig. 4 shows the Status view under released state according to equipment of the present utility model, wherein part 22 and 23 it Between visible separating distance 24；

Fig. 5 shows to see gas discharger 6 to loading plate 3 and at this setting together with pivot rods 5 and pantograph 4 Standby view；With

Fig. 6 and 7 shows the side view in the case where saving housing 1 according to equipment of the present utility model, and it shows gauge Bow 14 and 27 is in the off state in corresponding sub- face 19 ' and 21 or 19 together with the presence of the correlator face of pivot rods 5 Open that (Fig. 7 shows off-state and communication device is activated；Fig. 6 shows the state not disconnected).

According to overvoltage protection device of the present utility model including the lower cover 11 with Locking lug 24 and with locking The case lid 1 of break-through mouth 23.

Case lid 1 and lower cover 11 form shell body.

In addition at least one loading plate 9 be present.Two loading plates 3,9 are provided with the form of implementation according to Fig. 1,6 and 7.

On at least one more specifically described two loading plates 3,9, it is pressure-sensitive that plate-like is respectively equipped with side Resistor 10 or 2, the loading plate can have n sides shape shape, such as quadrangle form.Piezoresistor can pass through lug-shaped Projection is mechanically fixed and kept, and the raised of the lug-shaped extends from corresponding loading plate 3,9.

Gas discharger 6 is located between loading plate 3,9 and has electrical interconnecting means, and the electrical interconnecting means are in known manner With the corresponding connector wiring of piezoresistor 2,10.

In shown example, at least one gas discharger 6 is arranged on the second side of n sides shape loading plate 9.

Loading plate 9, which also has, is used at least one break-through mouth 30 that piezoresistor 10 couples contact site 31.

Pantograph 8 is provided with the second side of loading plate 9.

The pantograph 8 is turned on its second end and the electrical contact of gas discharger 6.

Pantograph 4,8 passes through soldering connection on its second end with the contact site 31 that couples of piezoresistor 10.The pricker It is desired thermal cutoff devices to weld connection.The positions of brazed portions and form selection and be so that not only hot gas discharger, And when heating piezoresistor, the thermal source is efficiently and quickly applied on brazed portions so that acquisition is desired can The disconnection effect leaned on.

This is externally provided with the first pivot rods 5 and the second pivot rods 7, and these pivot rods are made up of insulating materials.

Pivot rods 7 are supported on axle 25, and the axle 25 approximately perpendicularly extends from loading plate 9, more specifically in gas Extend on side residing for discharger 6.Pivot rods 7 have the drilling 26 for being used for accommodating axle 25.Pivot rods 5 in a similar way by Supporting.

Pivot rods 5,7 are supported on the stop part 16 of loading plate 9 or 3 under the tensioning of each spring element 13.In heat In the case of disconnecting device closure, pass through the motion path of the corresponding pivot rods 5,7 of the soldering connection locking of thermal cutoff devices.

With the fusing of solder, the thermal cutoff devices are released, and pivot rods 5,7 are then to pass through the spring force of element 13 The mode of auxiliary pulls pantograph 8, and the pantograph is transferred in the open position on contact site 31 or 22 (referring to figure 4)。

The disconnection device of closure is transferred to the process of off-state with it and can obtained from the view according to Fig. 2 a and 2b and Fig. 4 Go out.

The end of the remote axle of pivot rods 5,7 in the first way of realization perform pivot action when with communication device 12 Button 15 enters contact or discharges this button 15 so that the corresponding shape of overvoltage protection device can be correspondingly represented with signal State.

Also shown from Fig. 3, guide groove in pivot rods 7 be present, the guide groove is used for the end for accommodating spring element 13.

Corresponding pivot rods 5,7 have drivening piece 20, and the drivening piece pulls the pantograph 8 for receiving motion.

It such as equally can be derived that another carrying with another piezoresistor 2 be present from the view according to Fig. 1 Plate 3, wherein, moveable thermal cutoff devices, the thermal cutoff have been equally constituted on the side opposite with piezoresistor 2 Device has pantograph 4 and pivot rods 5.Therefore the symmetrical composition scheme of the redundancy of two multiple, outstanding thermal cutoff devices be present According to possibility of the present utility model, wherein, form scheme due to symmetrical and structure identical single-piece can be used so that The manufacturing cost for such overvoltage protection device can be reduced.Also being formed on corresponding loading plate 3,9 has interval holding Part 17,18 or 17 ', 18 ', as shown in fig. 2 a.

From Fig. 1, it also can be seen that, gas discharger 6 is located at loading plate 3 under the state that works well of overvoltage protection device And form between 9 and therefore sandwich.

Fig. 2 a is should refer to below, 2b, 6 and 7 illustrates particularly preferred second way of realization of triggering communication device 12.

Following feasibilities be present in second way of realization of triggering communication device 12：Disconnection dress with pivot rods 5 Put and have the disconnection device of pivot rods 7 to be applied on a unique common button 15 of communication device 12 and disconnect Cause triggering under state.

Therefore, gauge bow 14 on the loading plate 9 of correlation be present.One end of gauge bow 14 is according to the utility model Not the disconnecting of equipment in the state of clamping lock button 15 (see, for example, Fig. 2 a).

Pivot rods 7 point at it has the tapered finger 21 of taper on side of gauge bow 14.The finger-like of same taper Part 19 ' extends (referring to Fig. 2 a) from gauge bow 14 towards the finger 21.

For loading plate 3 mirror-image structure is set, is stacked and does not disconnect as a result, two gauges bend 14,27 approximations The button 15 of clamping lock communication device 12 under state (referring to Fig. 6).

In the off state, the taper surface of part 21 and 19 ' contacts with each other.Therefore, gauge bow 14 is in regarding according to Fig. 7 Move or moved downward in the view according to Fig. 2 a upwards in figure.Same content is applied to gauge bow 27, the gauge Bow is same to have taper surface 19, and mating reaction (is not shown) with other pivot rods 5 in the taper surface in fig. 2 a.

As the result of the motion process, the opening that gauge bends 14,27 occurs for approximation.Therefore, the button of communication device 12 15 are released and represent off-state with signal.By the corresponding determination size in face 21,19 and 19 ', with reference to button 15 Size is able to ensure that either triggered communication device 12 or the triggering are only used as two when thermal cutoff devices disconnect Result that equipment related to this disconnects is realized.Thus overvoltage protection device part can be also may be implemented in a straightforward manner Multi-levels display in the sense that failure.

The tapered finger 21 of taper on corresponding pivot rods 5,7 is integrally formed in Fig. 3 by taking pivot rods 7 as an example It can be seen that.

Fig. 5 shows the composition scheme of loading plate 3, and the loading plate has gas discharger 6, the pivot rods set in this place 5 and pantograph 4 and spring 13.

Fig. 4 diagrams show compartment when thermal cutoff equipment triggers completely between element 22 and 23 away from 24.In order to divide Sow discord away from 24 element that is readily identified and saving covering in addition.

Claims

1. a kind of overvoltage protection device, the overvoltage protection device, which has, at least one is arranged on the first of n sides shape loading plate (9) Piezoresistor (10), at least one gas discharger (6) and at least one thermal cutoff devices of plate-like on side, the heat Disconnect device and at least one piezoresistor (10) close thermal contact, wherein, aforementioned each component by shell body (1, 11) surround, and this is externally provided with for electrically connecting the mechanism with soldering on circuit boards,

Characterized in that,

At least one gas discharger (6) is arranged on the second side of n sides shape loading plate (9), and loading plate (9), which has, to be used for At least one break-through mouth (30) of the connection contact site (31) of piezoresistor (10), is provided with the second side of loading plate (9) Pantograph (8), the pantograph on the first end with gas discharger (6) make electrical contact with conducting and on its second end with The connection contact site (31) of piezoresistor by soldering connection to form the thermal cutoff devices, in addition form be supported on from Pivot rods (7) on the axle of loading plate (9) extension, the pivot rods (7) are supported under the mechanical tensioning of spring element (13) On the stop part (16) of the loading plate (9), the motion path of the pivot rods (7) is connected by the soldering of the thermal cutoff devices Connect and be locked out and be released with the fusing of solder, wherein, the pivot rods (7) pull pantograph and are transferred to disconnection In position.

2. overvoltage protection device according to claim 1, it is characterised in that the end of the remote axle of the pivot rods (7) Enter when performing motion with the button (15) of communication device (12) and contact or directly or indirectly discharge this button (15).

3. overvoltage protection device according to claim 1 or 2, it is characterised in that the pivot rods (7), which have, to be used to accommodate The guide groove of the end of the spring element (13).

4. overvoltage protection device according to claim 1 or 2, it is characterised in that being formed on the pivot rods (7) has band Moving part (20), the drivening piece fix the pantograph (8) to drive motion.

5. overvoltage protection device according to claim 1 or 2, it is characterised in that the overvoltage protection device includes having Another loading plate (3) of another piezoresistor (2), wherein, in another loading plate (3) and another piezo-resistance The opposite side of device (2) is provided with structure identical thermal cutoff devices, and the structure identical thermal cutoff devices are provided with another lead Pantograph (4) and another pivot rods (5).

6. overvoltage protection device according to claim 5, it is characterised in that the gas discharger (6) is located at each carrying Between plate (3,9).

7. overvoltage protection device according to claim 5, it is characterised in that the pivot rods of each thermal cutoff devices have respectively The finger (21) of taper, the finger are applied to gauge with the face (19,19 ') at gauge bow under disconnection and bent (14) on, to make the gauge bow be transferred in the position for the button (15) for discharging communication device (12).

8. overvoltage protection device according to claim 6, it is characterised in that the pivot rods of each thermal cutoff devices have respectively The finger (21) of taper, the finger utilize the face (19,19 ') at gauge bow to be applied to gauge under disconnection Bend on (14), to make the gauge bow be transferred in the position for the button (15) for discharging communication device (12).

9. the overvoltage protection device according to claim 7 or 8, it is characterised in that the face (19,19 ') is the face of taper.