EP0268098B1 - Appareil de commutation électrique, en particulier pour commande de puissance - Google Patents

Appareil de commutation électrique, en particulier pour commande de puissance Download PDF

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Publication number
EP0268098B1
EP0268098B1 EP87115387A EP87115387A EP0268098B1 EP 0268098 B1 EP0268098 B1 EP 0268098B1 EP 87115387 A EP87115387 A EP 87115387A EP 87115387 A EP87115387 A EP 87115387A EP 0268098 B1 EP0268098 B1 EP 0268098B1
Authority
EP
European Patent Office
Prior art keywords
switching
switch
spring
contact
stop
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP87115387A
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German (de)
English (en)
Other versions
EP0268098A3 (en
EP0268098A2 (fr
Inventor
Robert Kicherer
Willi Essig
Siegfried Mannuss
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ego Elektrogeraete AG
Original Assignee
EGO Elektro Geraete AG
EGO Elektro Gerate Blanc und Fischer GmbH
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Filing date
Publication date
Application filed by EGO Elektro Geraete AG, EGO Elektro Gerate Blanc und Fischer GmbH filed Critical EGO Elektro Geraete AG
Publication of EP0268098A2 publication Critical patent/EP0268098A2/fr
Publication of EP0268098A3 publication Critical patent/EP0268098A3/de
Application granted granted Critical
Publication of EP0268098B1 publication Critical patent/EP0268098B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/12—Means for adjustment of "on" or "off" operating temperature
    • H01H37/22—Means for adjustment of "on" or "off" operating temperature by adjustment of a member transmitting motion from the thermal element to contacts or latch
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/12—Means for adjustment of "on" or "off" operating temperature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H89/00—Combinations of two or more different basic types of electric switches, relays, selectors and emergency protective devices, not covered by any single one of the other main groups of this subclass
    • H01H89/04—Combination of a thermally actuated switch with a manually operated switch

Definitions

  • the invention relates to an electrical switching device, in particular for controlling the power of heating in heating devices, according to the preamble of claim 1 and is based on DE-B-23 08 750.
  • DE-B-23 08 750 shows a switching device in which the clocking operation can be bridged with a separate handle in order to set a high heating output, but this does not in any way affect the click rate when operating in automatically clocking switching cycles.
  • DE-A-15 65 682 shows a temperature controller which is influenced by a temperature sensor which detects the medium to be heated and which is designed such that the cracking rate is relatively increased in the low setting range.
  • the invention has for its object to provide an electrical switching device of the type mentioned, in which in a simple manner additionally affects the accuracy of the values of the relative duty cycle, which is dependent on the specific device-specific switching hysteresis, in particular in the range of smaller values can be. Furthermore, it should be possible to shift the curve vertex of the function of click rate and relative duty cycle for any desired setting range of the switching device in the desired manner, particularly in lower setting ranges, in the direction of smaller values of the relative duty cycle.
  • the curve vertex of the function mentioned from the switching frequency and relative duty cycle can be shifted in accordance with the performance level in the direction of smaller or larger values of the relative duty cycle and thereby the switching frequency associated with each setting range of the switching device can be changed so that it is possible to significantly reduce the click rate and / or the malfunction duration of the working switching device.
  • each adjustment range and thus each relative switch-on time of the switching device can be assigned a changed switching hysteresis, in particular in the direction of lower setting values, a value of the switch-off times that is reduced compared to the reduction in the switch-on times, whereby in the latter case there is the essential advantage that the smaller values of the relative duty cycle or the lower setting ranges of the switching device can be adjusted or adjusted much more precisely.
  • a particularly advantageous, simple, functionally reliable, compact and very precisely working development of the subject of the invention results from the features according to claim 3.
  • Switching hysteresis can be influenced in any way. It would also be conceivable to form the counter contact and / or the counter stop in a direction transverse to the switching movement direction of the switching contact, to arrange these two parts at an angle to one another and to change the switching path of the switching contact by one of these two parts and / or the switching contact The position can be changed to change the switching path in the longitudinal direction of the bar are arranged if the given spatial conditions can thereby be better used.
  • the switching hysteresis and possibly the setting range of the switching device or the switch-off point of the device switch can also be changed in a simple manner either by the features according to claim 4 or the features according to claim 5 or by a combination of these features.
  • the switching path of the switching contact with the adjusting device can be changed between at least one tenth and at most 2 to 3 mm, in particular between about 0.2 and at most 1.6 mm, preferably about 1.2 mm, wherein in In special cases, the smallest switching path can also be below the specified minimum value or the largest switching path can be above the specified maximum value.
  • the adjustment device for the switching hysteresis and the adjustment device for the setting ranges of the switching device mechanically coupled so that they are at least partially, preferably as a whole, formed by one and the same actuator.
  • the dimensions of the device switch can be chosen to be particularly small both in the direction of the setting shaft and in all directions transverse to it.
  • the adjusting device and the adjusting device therefore do not have to act on the device switch or the switching mechanism via separate pressure points, but instead a single pressure point with point or line contact can be provided.
  • the device switch can be mounted in a precisely pre-adjusted arrangement relative to the switching mechanism in a simple manner on a base body carrying these individual groups, is the further embodiment according to claim 8 provided, whereby all parts or assemblies of the switching device to be arranged on the housing body, for example forming a housing, are expediently mountable from one and the same side of the base body and in the same direction, in particular by plugging in, so that fully automatic assembly is particularly simple.
  • the direction of assembly is expediently parallel to the adjusting shaft.
  • the electrical switching device is expediently designed in such a way that the setting shaft can be transferred from the switch-off position into a first switch-on position only after prior unlocking by an axial movement, in particular an axial movement caused by pressure on the actuating element, said first switching position Switch-on position can coincide with both the lowest setting range and the highest setting range. Between the highest and the lowest setting range, the setting shaft can then be rotated without the locking becoming effective, the locking engaging again automatically under spring force when the switch-off position is reached.
  • the lock expediently has a spring ring which is arranged in an annular groove of the adjusting shaft and is not closed over the circumference in the manner of a snap ring and which cooperates with an annular disk associated with the latching device in such a way that it has its position in the annular groove of the adjusting shaft via inclined or inclined surfaces pressed by the force of a return spring and is thereby constantly secured in this position.
  • the locking member fixed in relation to the base body in the form of, in particular, a locking cam is expediently formed in one piece with part of the base body, preferably with an outer housing cover made of sheet metal or the like, which acts as a mounting plate for fastening of the switching device on a dashboard, for securing the position of a cup-shaped housing base body on the open mounting side closing body cover or the like.
  • the latching device is expediently essentially completely shielded from this housing cover and the cover to the outside, so that a high functional reliability is ensured by the fact that the latching device is protected against contamination.
  • the electrical switching device has a basic body 2, which is essentially rectangular in view of all the outer sides and forms an approximately closed housing, and which consists essentially of a cup-shaped housing body which is only open at its full front Insulating material, this housing body 3 on the open side essentially completely closing, approximately plate-shaped flat and on the inner shoulders of the housing base body 3 substantially sunk in this lying housing cover 4 also made of insulating material and a fuse cover 5 made of sheet metal or the like. is formed, which covers the housing cover 4 on the outside essentially completely and via resilient snap connections is in engagement with the housing body 3 in such a way that it secures the housing cover 4 in its closed position.
  • a device switch 6 designed as a snap switch is arranged, which is connected to an outside of the front side of the base body 2 as Hand gag trained actuator 7 via an adjustment shaft 8 penetrating the front at right angles into a switch-off position and continuously into different switch-on positions, which are assigned to different power setting ranges of the switching device 1.
  • the setting shaft 8 is mounted essentially exclusively in the bottom wall 9 and in the wall of the fuse cover 5 lying on the front side about its central axis 10.
  • the switching device 1 is provided with at least one further isolating contact 11 located within the housing space, the device switch 6 expediently on one side of the setting shaft 8 between this and a first lateral housing wall and the isolating contact 11 on the opposite side the setting shaft 8 are provided between this and a second side housing wall, such that the setting shaft 8 between the device switch 6 and the isolating contact 11 closer to the second housing wall and approximately in the middle between the two other side housing walls, which are approximately perpendicular thereto, namely one third and fourth side housing wall.
  • the longitudinal extensions of the device switch 6, one between the latter and the first housing wall and closely adjacent to this lying switching mechanism 12 and the isolating contact 11 are provided approximately parallel to one another and approximately parallel to the first and second housing wall, the device switch 6, the switching mechanism 12 and the isolating contact 11 extending approximately to the third and fourth housing wall.
  • the switching mechanism 12, which in turn is switched by the device switch 6, has a switching element 14, which is influenced by a temperature-dependent control circuit via a switching element 13 and acts on the device switch 6.
  • the thermomechanical switching element 13 is essentially formed by an elongated thermobimetal 15, which is offset several times from a rear straight or flat end section in the direction of the device switch 6, at the rear end section of which lies approximately over the full width in a heat-conducting connection and is wound on a lamellar insulating support Heating resistor 16 is arranged or attached so that this heating resistor 16 is on the side of the thermobimetal 15 facing away from the device switch 6.
  • the bimetallic metal 15 merges from the rear end section via a first offset into an intermediate section, which in turn merges over an approximately quarter-circle section towards the device switch 6 into an end section 17 which forms its free end and is approximately parallel to the other end section and which, for example, has the shape of a spherical cap switching element 14 formed by a rivet head.
  • the heating resistor 16, which is shorter than the thermobimetal 15, projects freely in the direction of the end section 17 via the intermediate section of the thermobimetal 15 which is approximately parallel to the rear end section.
  • the switching mechanism 12 or the bimetallic 15 is in the manner of a freely projecting handlebar on the rear, the third Housing wall near the adjacent end about a hinge axis approximately parallel to the central axis 10 of the setting shaft 8 by a flexible joint formed by a bending spring 18 so flexibly mounted that the switching element 14 is loaded against its directed against the punctiform contact on the device switch 6 movement.
  • the bending joint is formed in the transition region between the two legs of the angular spiral spring 18 lying approximately at right angles to one another, which legs have essentially the entire leg with one leg, in particular U-shaped at the end and attached to the side of the rear end section of the thermobimetal 15 facing away from the device switch 6
  • Switching mechanism 12 carries and with the outside of the other leg on a strip or.
  • the plate-shaped support body 19 is fastened with rivets or the like, which in turn is held directly adjacent to the third housing wall and lying parallel to it only by inserting into slots in the housing body 3.
  • the support body 19 also carries a compensation device 20, which serves for the automatic readjustment of the switching mechanism 12 or the switching element 14 depending on the respective ambient temperature, so that the ambient temperature does not correspond to each rotational position of the Adjustment shaft 8 associated power setpoint input changed.
  • the heating resistor 16 is electrically connected via a sliding movable contact element 21 which is formed in the manner of a runner by the bent end of a spring leg which presses the connecting element 21 constantly resiliently against the heating resistor 16.
  • This spring leg expediently forms the approximately straight line and approximately parallel to the heating resistor 16 closer to the bottom wall 9 end of a leg coil spring which is held by plugging its spiral section onto a mandrel 23 formed in one piece with the housing body 3 and located in the corner between the first and fourth housing walls in such a way that her leg forming the connecting member 21 protrudes freely against the heating resistor 16; the connecting member 21 is located on the side of the heating resistor 16 facing away from the bimetallic 15, immediately adjacent to the first housing wall.
  • the other, substantially longer and also approximately rectilinear spring leg 24 of the leg spring 22 is located directly adjacent to the inside of the fourth housing wall and touches with its free end in the manner of a sliding contact the outside of the longer leg of an angular support 25 for the contact member of the isolating contact 11 fixed to the housing, see above that the heating resistor 16 can be switched off at all poles.
  • the spring leg 24 lies between the inside of the fourth housing wall and the associated leg of the carrier 25, from which the other leg projects in the direction of the opposite housing wall and carries the associated contact member on its inside facing the device switch 6.
  • the compensation device 20 has an angular thermobimetal 26 with a longer leg which projects freely from the support body 19 in approximately the same direction as the switching mechanism 12 and which lies between the rear end section of the thermobimetal 15 or the heating resistor 16 and the first housing wall and is in the vicinity its free end over a spherical cap-shaped transmission surface approximately punctiform on the outside of the crossbar of the U-shaped end portion of the associated leg of the spiral spring 18 and thus at the rear end of the switching mechanism 12.
  • the transmission surface is formed by the end surface of an adjusting member 27 designed as an adjusting screw, which is accessible from outside the base body 2 through an opening in the associated first housing wall and passes through the bimetallic metal 26, so that the compensation device 20 is simultaneously integrated with an adjusting device, via which the entire switching device can be adjusted in a basic setting.
  • the other, shorter leg of the bimetallic strip 26 is attached to the side of the support body 19 facing away from the switching mechanism 12, so that the compensation device 20 forms a closed assembly with the switching mechanism 12.
  • the device switch 6 has, as a load-bearing, inherently stable base part, a support 28 which is essentially formed by a support lever 29 which projects freely in the manner of a one-armed lever and is formed from a flat material strip.
  • the support lever 29 lying in the same direction as the switching mechanism 12 and in its middle setting position lying approximately parallel to it, ie slightly approaching its free end at an acute angle of the first housing wall, has two approximately identical end sections that are approximately flush with one another and approximately rectilinear , between which a corrugated or flat S-shaped intermediate section is provided.
  • the carrier 28 is mounted so as to be resiliently pivotable relative to the base body 2 about a hinge axis parallel to the hinge axis of the switching mechanism 12, both hinge axes lying approximately in a common plane parallel to that axial plane of the setting shaft 8, which plane is approximately perpendicular to the longitudinal direction of the device switch 6 or Switch mechanism 12 or parallel to the third and fourth housing wall and to the support body 19.
  • the hinge axis of the carrier 28 is also formed by the transition region between the two spring legs of the spiral spring 30, such that the carrier 28 is spring-loaded in any position in the direction of the setting shaft 8 or the switch-on position of the device switch 6.
  • the device switch 6 has a two-part snap spring 31 with two essentially parallel and for the most part of its length with a small distance closely adjacent legs 32, 33 which are joined together in the region of the switching element 14 to form a pressure plate, for example by spot welding are and from this, protrude beyond the front end of the support lever 29 pressure plate against the support lever 29 at least over part of its length.
  • the snap spring 31 carries in the region of the free end of the leaf spring leg 33 further from the carrier 28 or from the setting shaft 8 a movable switching contact 34 in the form of, for example, a rivet element, which projects with a head over both sides of the leg 33.
  • the leg 33 forms an arcuate, with its convex side of curvature away from the carrier 28 and the switching mechanism 12 facing snap bracket 35, the end facing the switching contact 34 integrally merges into the leg 33 and the other, free end under pretension is supported in the manner of a cutting edge bearing in a fixed abutment relative to the carrier 28, which from the other leg 32 of the snap spring 31 is formed so that the carrier 28 itself does not have to be provided with such an abutment.
  • the abutment lies in the region of the free end of the carrying lever 29 and is offset relative to the latter in the direction of the legs 32, 33 of the snap spring 31.
  • the spherically curved contact surface of the switching contact 34 is opposite a correspondingly curved counter-contact surface of the counter-contact 36 fixed to the base body, which is provided on the side of the carrier 28 remote from the setting shaft 8 essentially between the snap spring 31 and the switching mechanism 12.
  • the other provided as a stop on the side of the leg 33 facing away from the counter contact 36 of the switching contact 34, is opposite a counter stop 37 with a likewise curved stop surface, this counter stop being formed in a simple manner by the head of a fastening element such as a rivet or the like can, with which the associated end of the leg 32 and thus the snap spring 31 as a whole is fastened to the rear end of the carrier 28, wherein the same fastening member can simultaneously serve to fasten the carrier 28 to the spiral spring 30.
  • the counter-stop 37 Due to the fact that the counter-stop 37 is arranged on the support 28 which is in turn mounted on the base body 2 so as to be changeable relative to the counter-contact 36, the counter-stop 37 can also be changed in position relative to the base body 2.
  • the mating contact 36 is with a plate-shaped, approximately parallel to the first housing wall and free in the housing space protruding carrier 38 held on the bottom wall 9.
  • the switching path of the switching contact 34 is determined by the distance between the counter contact 36 and the
  • an adjusting device 39 is provided, which is formed directly by the adjusting device for changing the power setting ranges of the switching device 1.
  • the adjusting device 39 has a cam 40 arranged on the setting shaft 8 within the housing space, which is connected in a rotationally fixed manner to the setting shaft 8 and, in the exemplary embodiment shown, is provided with a circumferential curve instead of, for example, an end curve, which is used to set the different setting ranges and to be dependent on them
  • Change in the switching hysteresis has different radial distances from the central axis 10.
  • the cam track of the adjusting device 39 has a switch-off cam section 42, which is formed by a cam-shaped projection which extends over an arc angle of approximately 30 ° around the central axis 10, is approximately symmetrically convexly curved and is designed such that its apex has the greatest radial distance Has curved path from the central axis 10.
  • the associated flank of the switch-off curve section 42 is followed by a small switch-on curve section 43 designed in the manner of a concave latching recess. which corresponds to the lowest power setting range of the switching device 1.
  • This switch-on curve section is in turn connected in the same direction an adjustment range curve section 44, which extends over the largest part of the circumference of the cam disk 40, for example over an arc angle of at least 240 °, and continuously approaches the central axis 10 in the manner of a circular path eccentric to the central axis 10 or a spiral curve.
  • This setting range curve section 44 merges on the side of the cam 41 facing away from the switch-on curve section 43 into its associated flank via an end position curve section 45, which in turn can also be designed in the manner of a concave detent depression and practically corresponds to the highest setting range of the switching device 1 .
  • Locking depressions can also be provided in the apex area of the cam 41 or in the setting area curve section 44, for example at its zone associated with the middle setting, so that when the actuating member 7 is actuated, a noticeable but easily overcome latching is provided.
  • the cam plate 40 can be designed such that it can be actuated from the switch-off position only in one direction of rotation, in particular in the direction of transfer to the lowest setting range, or that, as shown, from the switch-off position in both directions of rotation, that is also directly in the direction of the highest Adjustment range is actuated.
  • Snap bracket 35 is the Movable part of the device switch 6 via a cam runner 46 designed in the manner of a skid under resilient pressure on the cam track of the cam disk 40 is supported in a point-like or linear manner at a point which lies approximately in the axial plane of the cam disk 40 which is approximately at right angles to the central position located carrier 28 is.
  • the curve runner 46 is provided directly on the carrier 28 or formed by it and can be the curved section of the S-shaped intermediate section adjoining the front end section, so that no separate part is required.
  • the cam follower 46 measured at right angles to the axial plane mentioned, lies at a distance, for example, about a third smaller from the counter-stop 37 than from the pressure point of the switching element 14 and between these two parts.
  • the switching device 1 operates as follows: In the switched-off position, the switching contact 34 bears against the counter-contact 36 in the stop position on the counter-stop 37 without contact. After transferring the setting shaft 8 into a switch-on or setting range position, the switch contact 34 is transferred into its closed position on the counter-contact 36 via the leverage acting on it between the switching element 14 and the cam follower 46, and thereby the heating resistor in addition to the electrical device to be controlled by the switchgear 16 switched on.
  • the switching element 14 deflects in relation to its contact with the compensation device 20 and in relation to the spiral spring 18 in the direction of its contact movement against the pressure plate of the snap spring 31 until the dead center of the bistable snap spring 31 provided as the switching point is reached and this bouncy in Jumps towards its other end position, whereby it detaches the switching contact 34 from the counter contact 36 and bears against the counter stop 37.
  • the heating resistor 16 is de-energized, so that the bimetallic metal 15 cools again and returns in the direction of its starting position until the associated dead center of the snap spring 31 is reached and then the snap spring 31 again in a corresponding manner in the direction of springs to the first end position and thereby switches the switch contact 34 back into its closed position, thereby completing a working cycle switching cycle extending over a predetermined period.
  • both the deflection of the switching element 14 until the dead center position of the snap spring 31 and the distance of the counter-stop 37 from the mating contact 36 and thus the switching path of the switching contact 34 are changed.
  • the higher the setting range the greater must be the deflection movement of the thermobimetal 15, which takes place under the heating of the heating resistor 16 and is directed against the cam plate 40 in the sense of the system movement of the cam follower 46.
  • thermobimetal 15 the deflection or the correlating temperature of the thermobimetal 15 is plotted on the vertical axis, while the time is plotted on the horizontal axis.
  • a heating curve 47 results which rises steeply in a relatively slightly decreasing manner.
  • a cooling curve 48 results which initially falls relatively steeply and then gradually decreases.
  • the switch-on point of the device switch 6 and thus the switching on of the heating resistor 16 is approximately 49 on the heating curve 47 while the switch-off point is 50 on the heating curve 47, from which the cooling curve 48 then proceeds until it has reached the temperature level of the switch-on point again and that The temperature rises again on a further heating curve until the next switch-off point.
  • the temperature difference between switch-on point 49 and switch-off point 50 determines the switching hysteresis 51 of the device switch 1 in the associated setting range.
  • the associated switch-on time is denoted by 52 and the associated switch-off time by 53, the switch-off time being greater than the switch-on time 52 due to the specific course of the curve.
  • the sum of the switch-on time and switch-off time gives the period of a switching cycle.
  • the ratio of switch-on time 52 to switch-off time 53 depends on the size of the switching hysteresis 51 due to the non-linear curve. If the switching hysteresis 51 is reduced to the switching hysteresis 51 ⁇ , then both the absolute value of the switch-on time 52 ⁇ and the switch-off time 53 caps, as well as the ratio of these two values to one another, changes such that the switch-on time 52 ⁇ is greater than the switch-off time 53 ⁇ .
  • the click rate i.e. the number of switching operations per minute
  • the relative duty cycle of a switching device is plotted in percent on the horizontal axis, which results from the switch-on time multiplied by 100 and divided by the period .
  • the one function curve 54 corresponds, for example, to the switching hysteresis 51 and has its high point at about 50% relative duty cycle.
  • the other function curve 54 ⁇ corresponds, for example, to the switching hysteresis 51 ⁇ , the high point or vertex of this Functional curve 54 ⁇ is shifted towards lower values of the relative duty cycle. As further shown in FIG.
  • the click rate in the apex of the function curve 54 is also lower than in the apex of the function curve 54 ⁇ .
  • Increasing the click rate inevitably reduces the switch-off times 53 ⁇ . 8 that the switch-on point 49 ⁇ has shifted to the steeper part of the cooling curve 48, as a result of which the switch-off times decrease disproportionately in the manner described, so that small values of the relative switch-on time can then be set much more precisely.
  • the necessary change in the switching hysteresis 51, 51 ⁇ as a function of the relative duty cycle is carried out by the adjusting device 39, the switching frequency in the lower setting ranges being increased mechanically, similarly as is possible with a diode circuit.
  • a cam disk 55 for actuating the isolating contact 11 is arranged on the setting shaft 8.
  • All electrical connections for the switching device are provided in the form of tabs protruding from the bottom wall 9 of the base body 2.
  • the longer leg of the carrier 25 of the fixed contact member of the isolating contact 11 projects with a connection 56 formed in one piece with it over the outside of the bottom wall 9.
  • the carrier of the movable contact element of the isolating contact 11 protrudes with a connection 57, it being possible for a further fixed contact element to be provided with a protruding connection 58, which is switched simultaneously with the isolating contact 11 by its movable part.
  • the support body 19 is integral with it trained connection 59 and the carrier 38 with a one-piece with it formed connection 60 over the bottom wall 9 before.
  • the heating resistor 16 receives its power supply via the connection 60, the mating contact 36, the switching contact 34 abutting against it, the snap spring 31, the support lever 29, the integral springs 30, 18 or the support body 19, since these parts are electrically conductive Are connected to each other, this supply line being switched by the device switch 6.
  • the other supply line is connected by the leg spring 22 via the support 25 to the connection 56, so that the heating resistor 16 is also disconnected at all poles when the setting shaft 8 is switched off.
  • the two spiral springs 18, 30 are formed by a substantially U-shaped leaf spring, which is fastened with its U-transverse web 61 to the support body 19, so that this apart from the mating contact 36 with the associated carrier 38, the entire other device switch 6 and also up to the electrical connection formed by the leg spring 22 carries the entire switching mechanism 12 and also the entire compensation device 20 and forms with these functional groups a self-contained structural unit 62 which is held exclusively by the support body 19 in the base body 2.
  • the support body 19 is held on the base body 2 by insertion into corresponding housing slots from the open side of the base body 2 and by engagement of its connection 59 in a corresponding passage slot in the bottom wall 9.
  • the carriers of the movable and the fixed contact member of the isolating contact 11 are held by inserting them into slots in the same direction of insertion and by engaging their connections 56, 57, 58 in through slots in the bottom wall 9. Also the carrier 38 of the mating contact 36 is held on the base body 2 in this way.
  • the two opposing snap tabs 63 of the securing cover 5, one of which is located next to the passage opening for the adjusting member 27, have barb-shaped, inwardly projecting claw tabs 64 which engage corresponding outer shoulders on the side walls of the housing body 3.
  • a latching cam 65 is formed from the end wall of a circular, cup-shaped area formed from the fuse cover 5 and with its cup opening facing the housing body 3, which in the form of a punched-out and angled tab protrudes inside over this bulkhead.
  • the setting shaft 8 On the inside of this end wall, the setting shaft 8 is surrounded by an annular disk 66, which is non-rotatably engaged with the setting shaft 8, but axially from a stop position located closest to the outer end of the setting shaft 8 and relative to the setting shaft 8 can be moved inside.
  • the setting shaft 8 has in an annular groove 68 a stop ring 67 in the form of a spring ring which is bent in the form of a spring wire and which is snapped into the annular groove 68.
  • the annular disk 66 has in the area of its passage for the setting shaft 8 an inner, annular abutment shoulder 69 which widens in a funnel shape to the outer end of the setting shaft 8, for example is conically or concavely curved in cross-section, its smaller diameter being smaller than the outside diameter of the stop ring 67 and its largest, lying in the end face of the fuse cover 5 facing end Diameter is larger than the outer diameter of the stop ring 67.
  • the annular disk 66 also has a latching opening 70 at a circumferential point for the engagement of the latching cam 65, which is arranged such that it is aligned with the latching opening 70 only in the switched-off position of the adjusting shaft 8, which is provided in the manner of an axial groove on the outer circumference of the annular disk 66 is.
  • the setting shaft 8 is axially displaceable relative to the base body 2 against the force of a return spring 71, the return spring 71 essentially lying within the base body 2 in the form of a helical compression spring surrounding the setting shaft 8 and being supported with the associated end on the inner end face of the annular disk 66 , so that the adjusting shaft 8 can be pressed against the force of the return spring 71 about the height of the locking cam 65 in the base body 2.
  • the setting shaft 8 is also axially displaceable relative to the cam disk 40 and the cam disk 55, but is coupled in a rotationally locking manner, so that they remain stationary relative to the base body 2 during the axial movement of the setting shaft 8.
  • the return spring 71 engages in the cam plate 40.
  • the design according to the invention results in an extremely compact construction of the switching device 1, since all the individual parts can be accommodated very closely to one another both in the axial direction of the setting shaft and transversely thereto.
  • the stop ring 67 takes the washer 66 over the stop shoulder 69 against the force of the return spring 71 until the locking cam 65 is out of engagement with the locking opening 70 and therefore the setting shaft 8 can be rotated.
  • the detent cam 65 slides on the associated end face of the annular disc 66.
  • the shape of the stop shoulder 69 makes the stop ring 67 underneath the force of the return spring 71 compressed radially inwards so that it is constantly pressed into the annular groove 68 and cannot come out of engagement with the adjusting shaft 8.
  • the locking cam 65 ensures that switching the switching device 1 on can only be initiated by pressing the setting shaft 8.

Landscapes

  • Thermally Actuated Switches (AREA)
  • Relay Circuits (AREA)
  • Control Of Eletrric Generators (AREA)
  • Control Of Direct Current Motors (AREA)
  • Push-Button Switches (AREA)
  • Cookers (AREA)
  • Motor And Converter Starters (AREA)
  • Control Of Resistance Heating (AREA)
  • Electronic Switches (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Claims (10)

  1. Appareil de commande de puissance pour des appareils de chauffage électrique, avec un commutateur d'appareil (6), qui est commuté par un mécanisme de commutation (12), fonctionnant de façon cyclique automatique au moyen de plusieurs cycles de commutation successifs et influencé par une ligne de commande pouvant être chaque fois enclenchée conjointement avec l'appareil de chauffage, et qui peut être réglé à différents niveaux de puissance par un organe d'actionnement (7), le commutateur d'appareil (6) présentant une hystérèse de commutation (51, 51'), spécifique de l'appareil et fonction du niveau de puissance respectif, entre une température de connexion respectivement associée (49) et une température de déconnexion correspondante (50), caractérisé par un dispositif de réglage (39) avec une manette (7), dispositif qui produit dans toute la plage de puissance le réglage simultané du niveau de puissance et de l'hystérèse de commutation, l'hystérèse de commutation étant moindre quand le niveau de puissance (ED) est bas que quand il est élevé.
  2. Appareil selon la revendication 1, caractérisé en ce que la manette est formée par l'organe d'actionnement (7) de l'appareil de commutation (1) et est, de préférence, disposée à l'extrémité d'un arbre de réglage (8) de l'appareil de commutation.
  3. Appareil selon la revendication 1 ou 2, caractérisé en ce que le commutateur d'appareil (6) présente un contact de commutation (34), qui est mobile sur une course de commutation entre une position de connexion en application contre un contre-contact (36) et une position de déconnexion notamment en application contre une contre-butée (37), et en ce que le dispositif de réglage (39) permet de modifier la course de commutation, notamment la distance entre le contre-contact (36) et la contre-butée (37), en ce qu'en outre, de préférence, le contact de commutation mobile (34) du commutateur d'appareil (6) est sollicité vers au moins une position de commutation par un ressort de commutation, notamment est sollicité vers les deux positions de commutation par un ressort à déclic bistable (31), la précontrainte du ressort de commutation pouvant être modifiée par le dispositif de réglage (39), et en ce que, de préférence, le contact de commutation mobile (34) du commutateur d'appareil (6) est en engagement avec le mécanisme de commutation (12) par l'intermédiaire d'un élément de commutation (14) s'appuyant notamment en un point de pression contre le ressort de commutation, le dispositif de réglage (39) permettant de modifier la course de commutation de l'élément de commutation (14).
  4. Appareil selon l'une quelconque des revendications précédentes, caractérisé en ce que, lorsque la durée de service relative (ED) du commutateur d'appareil (6) diminue, le dispositif de réglage (39) diminue l'hystérèse de commutation (51, 51'), de préférence diminue la course de commutation du contact de commutation (34) et/ou augmente la précontrainte du ressort de commutation (31) et/ou diminue la course de commutation de l'élément de commutation (14).
  5. Appareil selon l'une quelconque des revendications précédentes, caractérisé en ce que, notamment lorsque le commutateur d'appareil (6) est conçu comme commutateur à déclic, le dispositif de réglage (39) permet de modifier la course de commutation du contact de commutation (34) entre environ 0,2 et 1,2 mm.
  6. Appareil selon l'une quelconque des revendications précédentes, caractérisé en ce que le dispositif de réglage (39) s'appuie, par un disque à came (40) notamment directement disposé sur l'arbre de réglage (8), tel qu'un disque à came périphérique, contre un élément porteur (28) qui est monté à déplacement dans un corps de base d'appareil (2), tel qu'un boîtier d'appareil, et qui porte la contre-butée (37) et/ou le ressort de commutation (31) et/ou le contact de commutation (34), en ce que, de préférence, l'élément porteur (28) est formé pour l'essentiel par un levier porteur (29), qui est monté de façon articulée, notamment au moyen d'un ressort de flexion (30), et qui, de préférence, porte sur un côté la contre-butée (37) et/ou le ressort de commutation (31) et s'applique par l'autre côté contre le disque à came (40), et en ce que, de préférence, l'élément de commutation (14) du mécanisme de commutation (12) est plus éloigné, dans la direction longitudinale du levier, de l'axe de pivotement du levier porteur (29) que la contre-butée (37), le disque à came (40) du dispositif de réglage (39) s'appuyant notamment contre le levier porteur (29), dans la direction longitudinale du levier, entre la contre-butée (37) et l'élément de commutation (14).
  7. Appareil selon l'une quelconque des revendications précédentes, caractérisé en ce que le mécanisme de commutation (12) de l'appareil de commande de puissance à fonctionnement cyclique présente un élément de commutation (14) influencé par un circuit de réglage en fonction de la température, et en ce que, notamment, une résistance de chauffage (16) de ce circuit de réglage, agissant sur un organe de commutation thermomécanique (13) de l'élément de commutation (14), est reliée au commutateur d'appareil (6), en ce qu'en outre, de préférence, l'organe de commutation thermomécanique (13) est un bimétal thermique (15) portant, notamment à la manière d'un levier, l'élément de commutation (14) au voisinage d'une extrémité, et la résistance de chauffage (16) est notamment disposée directement sur l'organe de commutation (13), et en ce que, de préférence, l'organe de commutation (13) est monté de façon articulée, notamment au moyen d'un ressort de flexion (18), sur le corps de base d'appareil (2), un ressort à lame essentiellement en forme de U étant notamment prévu, lequel est fixé au corps de base (2) par le dos (61) de sa forme de U et porte par une branche de ressort le levier porteur (29) et par l'autre branche de ressort l'organe de commutation (13).
  8. Appareil selon l'une quelconque des revendications précédentes, caractérisé en ce que le commutateur d'appareil (6) est, à l'exception du contre-contact (36), réuni avec le mécanisme de commutation (12) en une unité de construction préassemblée (62) en soi fermée, qui est notamment fixée en l'emboîtant dans le corps de base par un corps porteur (19) fixé au dos (61) du U du ressort à lame, le commutateur d'appareil (6) et/ou le mécanisme de commutation (12) étant notamment disposés essentiellement librement en saillie, et en ce qu'en outre, de préférence, un moyen de raccordement électrique de la résistance de chauffage (16) est formé par un simple ressort à branches (22) tel qu'un ressort spiral, qui est notamment emmanché par sa partie spirale sur un tenon porteur (23) du corps de base d'appareil (2), s'applique élastiquement contre la résistance de chauffage (16) par une branche constituant un élément de raccordement (21), et est prévu en application électriquement conductrice, par l'autre branche de ressort (24), contre un élément porteur (25) d'un contact de coupure supplémentaire (11).
  9. Appareil selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il est prévu, pour l'élément de commutation (14) ou encore le commutateur d'appareil (6), un dispositif compensateur (20), influencé par la température ambiante, qui présente notamment un bimétal thermique (26) agissant sur l'organe de commutation (13), et en ce que le dispositif compensateur (20) fait de préférence partie de l'unité de construction préassemblée (62).
  10. Appareil selon l'une quelconque des revendications 2 à 9, caractérisé en ce qu'il est prévu, pour l'arbre de réglage (8) placé en position de déconnexion, un blocage en rotation qui peut être déclenché en déplaçant axialement l'arbre de réglage (8), en ce que le blocage en rotation présente notamment un ergot de crantage (65) qui peut être axialement enclenché dans une ouverture de crantage (70), l'ergot et l'ouverture étant respectivement prévus sur un élément fixe par rapport au corps de base d'appareil (2) et sur un disque annulaire (66) axialement déplaçable avec l'arbre de réglage (8), en ce que, de préférence, le disque annulaire (66), sous la force d'un ressort de rappel (71) et par au moins un épaulement de butée (69) de forme essentiellement oblique en coupe transversale, s'appuie contre un anneau de butée (67), s'engageant dans une rainure annulaire (68) de l'arbre de réglage (8), de telle sorte que cet anneau est radialement comprimé, et en ce que, de préférence, l'ergot de crantage (65) est réalisé d'un seul tenant avec un élément de construction du corps de base d'appareil (2), notamment est formé en découpant ou recourbant un couvercle de blocage (5) constitué d'une tôle ou similaire, l'arbre de réglage (8) étant de préférence disposé à mobilité axiale, par rapport au disque à came (40) du dispositif de réglage (39), au moins de la hauteur de l'ergot de crantage (65).
EP87115387A 1986-11-15 1987-10-21 Appareil de commutation électrique, en particulier pour commande de puissance Expired - Lifetime EP0268098B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3639186 1986-11-15
DE19863639186 DE3639186A1 (de) 1986-11-15 1986-11-15 Elektro-schaltgeraet, insbesondere zur leistungssteuerung

Publications (3)

Publication Number Publication Date
EP0268098A2 EP0268098A2 (fr) 1988-05-25
EP0268098A3 EP0268098A3 (en) 1989-10-11
EP0268098B1 true EP0268098B1 (fr) 1994-07-13

Family

ID=6314099

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EP87115387A Expired - Lifetime EP0268098B1 (fr) 1986-11-15 1987-10-21 Appareil de commutation électrique, en particulier pour commande de puissance

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Country Link
US (1) US4829279A (fr)
EP (1) EP0268098B1 (fr)
JP (1) JP2631376B2 (fr)
AT (1) ATE108573T1 (fr)
AU (1) AU598058B2 (fr)
CA (1) CA1276959C (fr)
DE (2) DE3639186A1 (fr)
ES (1) ES2056056T3 (fr)
YU (1) YU205187A (fr)

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KR101963656B1 (ko) 2018-03-12 2019-03-29 주식회사 박전자 조작감도 개선형 전기레인지의 온도제어장치
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CN112563084B (zh) * 2020-12-25 2025-05-09 浙江奥来电器有限公司 一种断路器的锁扣装置
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Also Published As

Publication number Publication date
DE3639186A1 (de) 1988-05-26
CA1276959C (fr) 1990-11-27
DE3750212D1 (de) 1994-08-18
YU205187A (en) 1990-04-30
EP0268098A3 (en) 1989-10-11
AU598058B2 (en) 1990-06-14
US4829279A (en) 1989-05-09
AU8119787A (en) 1988-05-19
JP2631376B2 (ja) 1997-07-16
JPS63141229A (ja) 1988-06-13
ES2056056T3 (es) 1994-10-01
ATE108573T1 (de) 1994-07-15
EP0268098A2 (fr) 1988-05-25

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