EP0091009A2 - Indicateur électromécanique de surcharge pour appareils électriques à courant alternatif, notamment boîtes à prises multiples - Google Patents

Indicateur électromécanique de surcharge pour appareils électriques à courant alternatif, notamment boîtes à prises multiples Download PDF

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Publication number
EP0091009A2
EP0091009A2 EP83102876A EP83102876A EP0091009A2 EP 0091009 A2 EP0091009 A2 EP 0091009A2 EP 83102876 A EP83102876 A EP 83102876A EP 83102876 A EP83102876 A EP 83102876A EP 0091009 A2 EP0091009 A2 EP 0091009A2
Authority
EP
European Patent Office
Prior art keywords
overload indicator
indicator according
current
vibrator
armature
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.)
Withdrawn
Application number
EP83102876A
Other languages
German (de)
English (en)
Other versions
EP0091009A3 (fr
Inventor
Klaus Dipl.-Ing. Becker
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.)
Brunnquell Fabrik Electrotechnischer Apparate GmbH
Original Assignee
Brunnquell Fabrik Electrotechnischer Apparate GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Brunnquell Fabrik Electrotechnischer Apparate GmbH filed Critical Brunnquell Fabrik Electrotechnischer Apparate GmbH
Publication of EP0091009A2 publication Critical patent/EP0091009A2/fr
Publication of EP0091009A3 publication Critical patent/EP0091009A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/66—Structural association with built-in electrical component
    • H01R13/665—Structural association with built-in electrical component with built-in electronic circuit
    • H01R13/6691—Structural association with built-in electrical component with built-in electronic circuit with built-in signalling means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/66—Structural association with built-in electrical component
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/66—Structural association with built-in electrical component
    • H01R13/68—Structural association with built-in electrical component with built-in fuse

Definitions

  • the invention relates to an electromechanical overload indicator for AC electrical devices, in particular multiple sockets, according to the preamble of claim 1.
  • a number of electrical devices that are operated with technical AC power are not protected against overload due to excessive current flow.
  • Multiple sockets in particular seduce users by overloading by attaching too many and too powerful consumers. If such a multiple socket is provided with a conventional overcurrent protection switch, it would trip immediately in the event of a surge. In the case of a slight permanent overload, however, such switches are too inert, so that they are only triggered after a certain time delay. This can lead to inconvenience if in such a case important consumers such as Freezers and the like are also affected by the shutdown.
  • a multiple socket can also be destroyed by permanent overload.
  • buzzer As a warning device; for example, an acoustic display of egg boilers should be mentioned. But the known buzzers work voltage-dependent and are therefore less suitable for monitoring a maximum current. They also do not have the desired hysteresis behavior, which means that the warning tone does not jump as desired, but gradually, e.g. starts with slowly increasing current.
  • the object of the invention is to provide a simple electromechanical warning device against overloading of AC devices, for example multiple sockets, which in the event of an overload performs its warning function without inertia;
  • the actual warning device should be flat and robust against mechanical (e.g. when the device falls) and electrical (voltage peaks) stresses, as well as being resistant to aging. Hysteresis behavior is also desirable.
  • the solution is defined in claim 1.
  • Essential for the solution according to claim 1 is a particularly flat and relatively space-saving electromechanical vibrator which generates a sudden warning sound as soon as the AC current value permissible for the device to be secured is exceeded.
  • the vibrator used shows good hysteresis behavior, so that the user is not already confused by an early warning tone if the current is close, but still below the limit value. Even with continuous use, there is no danger that the vibrator will be destroyed for mechanical or thermal reasons.
  • the vibrator can also be retrofitted into a wide variety of AC devices.
  • the warning device reacts as quickly as an overcurrent protection switch, but in the event of continuous overload, it does so much faster, namely immediately after the overloading consumer is switched on.
  • an unmistakable acoustic warning signal sounds, which can also be coupled with an optical signal.
  • a warning signal is advantageous in the event of an overload, namely when an additional plug is plugged in, the load of which exceeds the nominal current limit. Due to the warning signal starting immediately, the user notices when the plug is inserted that there is an error; the plug will then be removed again instinctively.
  • a particularly pleasant use of sound is achieved by the measure according to claim 5.
  • the claim 7 shows that the vibrator can also be used, at least as a side effect, as an air-moving and thus cooling fan.
  • claims 8-9 describe, for example, the additional design of an optical (remote) display.
  • the device is absolutely foolproof.
  • Fig. 1 shows the electromechanical overload indicator, for example installed in a multiple socket.
  • the underside of the cover 2 is shown as a two-part socket strip in a position rotated by 180, that is to say with the inner parts of the strip 1 pointing upwards.
  • bottoms 4 of the pots 5 for inserting Schuco plugs with bores 6 for passing the plug pins and openings 7 for the protective springs can be seen.
  • the pots 5 are braced against the walls 8 of the lid 2 by ribs 9.
  • the electromechanical, acoustic overload indicator, a vibrator or buzzer, is generally designated 10 here.
  • the overload indicator 10 As shown in FIG. 2 in particular, it is possible thanks to the extremely flat design of the overload indicator 10 to easily insert it later into an existing housing 3 of a strip 1.
  • the overload indicator 10 is inserted with a press fit between the ribs 9 and the walls of the pots 5.
  • the fixed connection between the overload indicator 10 and the wall areas of the housing 3 is expedient because it thereby acts as a kind of soundboard and thus has a sound-reinforcing effect.
  • the overload indicator 10 if the installation conditions are more favorable here than in cover 2, it can just as well be installed in the lower part. Thanks to its robustness and freedom from maintenance, the overload indicator 10 is also particularly suitable for power strips that are welded at the factory after assembly or wiring.
  • FIGS. 3 to 5 show a perspective illustration of an example of a particularly expedient and production-oriented solution for the actual electromechanical, acoustic overload indicator 10, which will henceforth be referred to briefly as "vibrator".
  • An M-shaped soft iron core 16 consisting of the main leg 11 and at least one secondary leg 12 or 13, is opposed here by a magnetically conductive armature 14 which is resiliently supported by two leaf springs 15.
  • At least one of the legs 11, 12 or 13 is acted upon by a coil 22 which carries the device alternating current to be monitored.
  • a magnetic alternating flux with a frequency of 50 or 60 Hz (corresponding to the respective mains frequency) arises in the legs and in the armature. Above a certain current, the alternating flow is so great that the armature 14 begins to oscillate at twice the mains frequency.
  • the amplitude of the armature oscillation increases.
  • the armature 14 strikes for the first time against a resistance, here the legs 11-13, and suddenly starts a bright humming sound of 100 Hz with corresponding harmonics.
  • the response current can be adjusted by increasing or decreasing the number of turns.
  • the number of turns can be reduced in a simple manner by short-circuiting adjacent turns.
  • one or more known intermediate taps 23 can also be provided between the mains-side coil end 20 and the load-side coil end 21.
  • the core can also have an iron shunt for adjustment. In general, however, one will get by in the normal design of devices provided with such overload indicators without this alternative adjustment possibility.
  • the armature 14 can initially oscillate freely and thus inaudibly at twice the mains frequency (100 or 120 Hz).
  • the armature strikes at least one of the legs 11, 12, 13 for the first time. From this it is reflected mechanically and elastically, and then, once stimulated to vibrate more violently, hit the legs 11-13 again with almost equally vehement shocks, emitting a loud buzzing or humming noise. If the current flowing through the coil 22 increases further, this behavior practically does not change, since the amplitude of the armature oscillation is limited and thus stabilized by striking the legs 11-13.
  • the reflective effect of the legs and thus the warning tone effect initially remain obtained, which gives sufficient hysteresis. The sound only stops abruptly when the current falls below a predetermined minimum value.
  • the vibrator is only about 30 mm high and about 20 mm wide.
  • the depth 17, without the coil 22, is only about 4 mm.
  • the outer winding diameter of the coil 22 is about 9 mm here.
  • the coil can also be made with a rectangular cross-section and thus flatter.
  • the coil consists directly of a few turns of a phase of the device supply line, which is wound a few times around the middle leg before connection in the device.
  • the soft iron core 16 can be designed as a rectangular core 18 punched out of sheet metal, as can be seen from FIG. 8.
  • the legs for example the middle leg kel, spring-mounted by means of spring 15 'and takes over the function of anchor 14'.
  • FIG. 9 shows a wiring example of a power strip equipped with the vibrator.
  • the connection terminals are in the lower part of the socket, but the vibrator is accommodated in the cover according to the example shown there.
  • the end 20 of the current coil to the vibrator 10 is connected to a terminal 30 'in the socket strip.
  • the end 21 lies on the clamp 30 "" which is usual with such strips, so that the total load flows through the current coil 22 in any case.
  • the resonance frequency of the spring-mass system consisting of spring 15 and armature 14 roughly corresponds to twice the mains frequency.
  • the natural frequency of springs 15 and armature 14 is set to 50 Hz, the system will initially sound at 50 Hz after the first striking, but with a further increase in current because of the increasing F, it will finally sound at a predetermined current value of 100 Hz. In this case, too, the property of the abrupt use and drop of sound is retained.
  • the vibrating part (s) of the system have a cooling effect, e.g. exercises (or exercises) on the power coil or on other parts of a particular device that require cooling.
  • a cooling effect e.g. exercises (or exercises) on the power coil or on other parts of a particular device that require cooling.
  • the vibrating parts are expediently designed to be as large as possible. This configuration of the vibrator is primarily suitable for other fields of application than the socket described here.
  • the vibrator which consists in the fact that the current coil also acts as a suppression choke.
  • a combination of cooling and interference suppression is particularly advantageous.
  • This configuration can be used primarily with switched or clocked electrical devices.
  • the particularly flat, space-saving design of the vibrator is always advantageous for all conceivable applications.
  • the vibrator advantageously differs from all known buzzer types.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
EP83102876A 1982-04-01 1983-03-23 Indicateur électromécanique de surcharge pour appareils électriques à courant alternatif, notamment boítes à prises multiples Withdrawn EP0091009A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19823212095 DE3212095C2 (de) 1982-04-01 1982-04-01 Elektromechanischer Überlastanzeiger
DE3212095 1982-04-01

Publications (2)

Publication Number Publication Date
EP0091009A2 true EP0091009A2 (fr) 1983-10-12
EP0091009A3 EP0091009A3 (fr) 1986-09-10

Family

ID=6159954

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83102876A Withdrawn EP0091009A3 (fr) 1982-04-01 1983-03-23 Indicateur électromécanique de surcharge pour appareils électriques à courant alternatif, notamment boítes à prises multiples

Country Status (4)

Country Link
EP (1) EP0091009A3 (fr)
DE (1) DE3212095C2 (fr)
ES (1) ES521127A0 (fr)
GR (1) GR77990B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0418496A1 (fr) * 1989-09-02 1991-03-27 Hermann Kleinhuis GmbH. & Co. KG Appareil d'installation électrique, notamment prise de sécurité
CN112332169A (zh) * 2020-11-24 2021-02-05 李英艳 一种基于磁流变液的电力用防误拔插座

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3840198A1 (de) * 1988-11-29 1990-05-31 Dehn & Soehne Steckdose mit ueberspannungsschutz
DE4021730A1 (de) * 1990-07-07 1992-01-16 Hochkoepper Paul Gmbh Stromwaechter fuer niedervoltbeleuchtungsanlagen

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3054994A (en) * 1958-07-30 1962-09-18 Haram Arthur Carsten Visual signal generation and electrical outlet control means therefor
US4002397A (en) * 1975-09-29 1977-01-11 Wolsk Associates, Ltd. Connector for electric plug
DE2743454A1 (de) * 1977-09-27 1979-04-05 Siemens Ag Mit wechselspannung zu betreibender summer
NL7908179A (nl) * 1979-11-08 1981-06-01 Smitt H M Instr Bv Storingsverklikker.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0418496A1 (fr) * 1989-09-02 1991-03-27 Hermann Kleinhuis GmbH. & Co. KG Appareil d'installation électrique, notamment prise de sécurité
CN112332169A (zh) * 2020-11-24 2021-02-05 李英艳 一种基于磁流变液的电力用防误拔插座

Also Published As

Publication number Publication date
ES8401798A1 (es) 1984-01-01
DE3212095A1 (de) 1983-12-01
DE3212095C2 (de) 1984-09-27
GR77990B (fr) 1984-09-25
ES521127A0 (es) 1984-01-01
EP0091009A3 (fr) 1986-09-10

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