EP0033675A1 - Elektrische Vorrichtung mit einem berührungssicheren Sicherungshalter - Google Patents

Elektrische Vorrichtung mit einem berührungssicheren Sicherungshalter Download PDF

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Publication number
EP0033675A1
EP0033675A1 EP19810400045 EP81400045A EP0033675A1 EP 0033675 A1 EP0033675 A1 EP 0033675A1 EP 19810400045 EP19810400045 EP 19810400045 EP 81400045 A EP81400045 A EP 81400045A EP 0033675 A1 EP0033675 A1 EP 0033675A1
Authority
EP
European Patent Office
Prior art keywords
fuse
cradle
contact
housing
socket
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.)
Ceased
Application number
EP19810400045
Other languages
English (en)
French (fr)
Inventor
Jacques Respaut
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.)
Lmi France
Original Assignee
Lmi France
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 Lmi France filed Critical Lmi France
Publication of EP0033675A1 publication Critical patent/EP0033675A1/de
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/54—Protective devices wherein the fuse is carried, held, or retained by an intermediate or auxiliary part removable from the base, or used as sectionalisers
    • H01H85/547—Protective devices wherein the fuse is carried, held, or retained by an intermediate or auxiliary part removable from the base, or used as sectionalisers with sliding fuse carrier
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/54—Protective devices wherein the fuse is carried, held, or retained by an intermediate or auxiliary part removable from the base, or used as sectionalisers
    • H01H85/542—Protective devices wherein the fuse is carried, held, or retained by an intermediate or auxiliary part removable from the base, or used as sectionalisers the intermediate or auxiliary part being provided with bayonet-type locking 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
    • H01R13/68—Structural association with built-in electrical component with built-in fuse

Definitions

  • the present invention relates to a fuse holder intended to receive a fuse by inserting it into an electrical circuit to be protected, and more particularly to a fuse holder intended to equip a circuit where the fuse is placed at a point capable of being brought to high voltage dangerous for a user in the event of direct contact; it applies in particular to fuse holders fitted to electrical circuits connected to the 220-volt alternative distribution network.
  • such a fuse can be fitted to electrical outlets, switches, various appliances (household appliances, industrial appliances), electrical distribution boards, etc., and it is desirable that it be easily accessible to be changed when 'it is defective.
  • a housing in an external body having a front wall, a housing can receive by an opening in this front wall a cylindrical cartridge enclosing a fuse, the contacts with a phase conductor of the socket and the current arrival being made at the ends of the cylindrical cartridge.
  • a screw cap can close the housing by keeping the ends of the fuse in contact with the necessary electrical parts. The user should normally first insert the cartridge into the cap and then screw the cap into the housing, but there is the risk that instead of inserting the cartridge into the housing, pushing it with your finger, and qu 'he screws the cap after. When the cartridge is pushed to the bottom of the housing, it comes into contact with a phase conductor likely to be energized at that time and there is therefore a danger of electric shock to the user.
  • the present invention seeks to avoid this risk by producing a fuse holder in which it is not possible to have manual access to one end of the fuse when the other end is in contact with a conductive part capable of being energized. , this fuse holder being produced economically and with a footprint as small as possible (in particular to be adapted on existing sockets or there is little space to accommodate one or possibly two fuses).
  • the present invention provides a safety fuse holder intended to receive a fuse to keep it in contact with an electrical part capable of being energized and to allow the fuse to be removed, particularly in view of its replacement, safe during handling, comprising an outer body having a front wall and a housing for receiving a fuse, the housing having an opening in the front wall, and a plug for closing this opening capable of close the housing by keeping the fuse in electrical contact with the electrical part likely to be live and with another electrical part in the housing, characterized in that it comprises a cradle of insulating material for receiving the fuse, this cradle can move inside the housing and can be partially removed by the opening in the front wall, to a position where the installation or removal of a fuse in the cradle is possible, total removal of the cradle being prevented by a cradle retaining means, the cradle comprising on the rear side (the most interior of the housing) a part forming a partial shutter of the opening of the front wall, preventing t penetration of a fuse
  • the plug and the cradle form an insulating integral block, the plug constituting at the same time said front protective part which prevents manual contact with the fuse before the latter comes into contact with the electrical part likely to be live.
  • the fuse housing also contains the socket, accessible through the front wall like the fuse but through another opening.
  • a curved elastic conductive strip surrounding the fuse and its cradle and shaped so as to comprise a part which comes opposite the socket opening of the front wall and which constitutes said contact socket capable of receiving a pin.
  • an elastic contact blade can be provided fixed to the bottom of the housing (or a conductive part recalled by a spring), against which the cartridge comes to rest when places the plug in the housing.
  • an elastic contact blade capable of being applied against a conductive part at the bottom of the housing when the cradle is completely inserted, is carried by the rear end of the cradle.
  • This elastic contact blade is in the latter case preferably mounted with a certain clearance this sliding in the direction of introduction of the cradle into the housing to facilitate removal of the fuse from the cradle.
  • the contact blade can have a shape such that it constitutes the partial shutter preventing the penetration of a fuse when the cradle is removed.
  • the partial shutter in the general case, provision will be made for the partial shutter to be constituted by a projecting part molded with the cradle, at the rear part of the latter.
  • FIG 1 we generally see a front view of a socket 1 intended to be built into a wall or a table with claws fastening 2 which can hang on the back of a panel or a flange surrounding the socket.
  • the socket shown has two cells 3 and 4 for receiving male conductive pins and a ground pin 5, the two cells and the pin 5 being arranged in a triangle according to current French standards and opening onto the front wall 10 of the socket.
  • this fuse consists of a cylindrical cartridge penetrating axially into a housing in the outer body 12 of the socket , the fuse being placed near the cell 4 and allowing the electrical connection of this cell 4 to a current supply inside the socket.
  • the fuse housing opens through an opening on the front face 10 of the socket 1, and this opening is closed by a plug 6 made of insulating material provided for example with a diametrical groove 7 allowing the plug to be opened by rotation, at the l using a screwdriver or a coin.
  • Figure 3 shows a front view of an alternative embodiment of socket, made according to a model of German standard in which there are provided two cells 3 and 4 containing current transmission sockets, and two ground pins 9 symmetrical and section rectangular.
  • a fuse is required for each socket in cells 3 and 4 and we see in Figure 3 two plugs 6 placed on the front wall 10 of the socket, each next to a respective cell and closing a fuse housing corresponding to the socket of this cell.
  • the body of the socket is designated by the reference 18; it includes an exposed part 20, external to the panel or to the wall on which the socket is fixed.
  • the body 18 is extended at its rear part by a bottom 21 which incorporates the electrical connections used to connect, during the installation of the socket, the socket-outlets or the earth pin to the current-supply conductors or of the installation.
  • the bottom 21 is screwed onto the part 20 which, for its part, comprises on its front face which constitutes the front wall of the socket, openings allowing the penetration of pins towards the socket outlet socket, and also comprises the ground pin and an intro opening duction of a fuse cartridge, accessible from the front of the socket.
  • FIG 4 we see a cylindrical cell 22 corresponding to the cell 4 of Figure 1.
  • This cell opens inside the body 21, in a space containing a "lyre" contact which is an elastic conductive strip 23 (better visible in Figure 7) curved so as to form at its upper end 24 two branches having contact surfaces facing each other to form a conductive socket facing the socket 22 and able to grip with a narrow elastic contact a conductive male pin introduced into the socket 22.
  • a "lyre" contact which is an elastic conductive strip 23 (better visible in Figure 7) curved so as to form at its upper end 24 two branches having contact surfaces facing each other to form a conductive socket facing the socket 22 and able to grip with a narrow elastic contact a conductive male pin introduced into the socket 22.
  • the end 28 of the fuse 27 comes to be applied q uence, when the fuse is in place, against the conductive contact plate 26 which itself presses against the connection 25 into the body 21.
  • the blade 26 can very well be fixed as well as the connection 25 to the rear part of the bottom 21. In the example shown, the blade 26 has a curved shape with a free branch pressed against the end 28 of the fuse.
  • the other end 29 of the fuse is in contact with a conductive element 32 which is better visible at the FIG. b, element which forms a conductive contact with the moving head 23 to transmit the current in series from the connection 25 to the socket 24 passing through the fuse 27.
  • the contact element 32 and the fuse 27 are carried by a fuse holder cradle 30, made of insulating material, which is terminated at its front part by an insulating protective part 31 which in fact constitutes the plug 6 of FIGS. 1 and 3 but which could be separated from this plug.
  • the protective part forming a plug 31 is provided with a slot 33 enabling it to be actuated in rotation with a coin or a screwdriver.
  • the assembly of the cradle and the fuse holder cartridge can be inserted inside the body of the socket. The introduction is done against the elastic force of the conductive spring 26 and the locking in place of the assembly is preferably done thanks to a bayonet system which makes it possible to wedge the assembly by rotation of the plug of a certain angle.
  • the contact element 32 carried by the cradle at the rear of the insulating protective part, which has a shape adapted (with lateral ears) to cooperate in the manner of a bayonet system with notches at 33 provided in the lyre 23 ( Figure 7).
  • the bottom of the latter surrounds the fuse and its cradle so that the notches are located on either side of the cradle.
  • the cradle 30 essentially consists of a cylinder portion corresponding to the cylindrical shape of the cartridge 27, this cylinder portion being terminated at its rear part (opposite the plug 31) by a part 34, the function of which will be explained. below.
  • a tongue 35 extending parallel to the cradle 30 and ending at its end located most inside the socket fuse housing by a shoulder 36.
  • the fuse holder cradle is shown in the position of maximum withdrawal, the shoulder 36 coming into contact with the shoulder 37. In this position, the fuse is completely out of contact with the connection 25 or the spring. 26 which are likely to be under tension.
  • the position of maximum withdrawal of the cradle it is not possible to introduce a fuse in the fuse housing of the socket without first introducing it into the cradle 26.
  • the safety fuse holder With the shape of the cradle and of the socket in the form of an elastic blade surrounding the cradle, the safety fuse holder according to the invention can be adapted to German type sockets where it is necessary to have a protective fuse for each current supply socket.
  • fuses and cradles are made in a similar manner as are the elastic blades forming sockets and each surrounding the fuse corresponding to the respective socket.
  • sockets in the form of elastic blades the bottom of which surrounds a fuse and its cradle, and the branches of which form elastic contact sockets facing the pins insertion slots on the front face of the socket, allows 'adapt the safety system of the invention to German sockets with two fuses, without increasing the dimensions of the socket.
  • FIGS. 8 to 10 there is shown an alternative embodiment of the invention, similar to that of FIGS. 4 to 6 in that they also relate to a safety fuse holder incorporated into a socket, but differing slightly from the embodiment of FIGS. 4 to 6 as regards on the one hand the retaining means of the cradle, and on the other hand the constitution of the partial shutter avoiding the introduction of a fuse directly into the housing without passing through the cradle.
  • FIGS. 8 to 10 the elements identical to those of FIGS. 4 to 6 are given the same references: it is the body 18 of the socket with a bottom 21 screwed onto a front part 20, of the cell 22 allowing the penetration of a pin towards a corresponding socket, of the lyre 23 still having the form shown in FIG. 7, with its end portion 24 constituting the contact socket, of the conductive connection 25 capable of being live and intended to be electrically connected via the fuse 27 to the socket 24, the cylindrical fuse cartridge 27 with its ends 28 and 29 and finally the cradle 30 for receiving the fuse cartridge 27 with its insulating protective plug 31 provided with a contact element 32 and a slot 33 for unlocking and locking it in the operating position.
  • the tongue 35 serving as a means of retaining the cradle: it consists of a flexible curved strap which, instead of simply sliding in the direction of withdrawal of the cradle being stopped by a stop, is here fixed both to the cradle and to the body of the socket, and which, thanks to its flexibility, follows the movement of the cradle while rolling like a caterpillar.
  • the tongue instead of being fixed to the front part of the cradle, as in FIG. 4, here the tongue has one end 38 fixed to the rear part of the cradle, while its other end 39 is fixed between the body 20 and the bottom 21 that is, rather towards the front of the fuse housing.
  • the other end of the tongue is simply wedged between the body 20 and the bottom 21 which are screwed one on the other, the cradle, its stopper and the tongue 35 being able to be made in a molded piece of material.
  • plastic shown in perspective in Figure 10.
  • This molded part does not have a terminal spout at the rear to form the partial shutter preventing the direct introduction of a fuse without passing by the cradle when the cradle is out; the function of partial shutter is here fulfilled by a curved elastic blade fixed to the rear end of the cradle and also intended to make elastic electrical contact between the connector 25 and the end 28 of the fuse when the cradle is pressed in the operating position , cap 31 closed.
  • This elastic curved blade is designated by the reference 26 '. As can be seen, this blade is kept attached to the cradle 30 by one of its ends which is slid and wedged between the lower part of the cradle and the tongue 35. sliding play is provided to allow movement of the blade 26 'in the direction of insertion of the fuse to facilitate the removal of the fuse when the cradle is pulled: the blade 26 'no longer applies forcefully against the fuse as soon as the cradle is sufficiently withdrawn so that it ceases to be in contact with connector 25 at the bottom of the fuse housing.
  • FIGS. 11 to 13 Another variant embodiment is shown in FIGS. 11 to 13. This variant relates to the shape of the cradle retaining means, to the shape of the conductive contact element 32 located at the rear of the insulating protective part at the 'front of the cradle, and on the constitution of the electrical contact between the rear of the fuse (end 28) and the conductor likely to be live at the bottom of the fuse housing.
  • the means this retainer consists of a rigid hooking part 40 placed completely at the rear of the cradle and bending to come under the bottom of the contact lyre 23 when the cradle is removed (see FIG. 13).
  • the lyre then forms a stop because it cannot move in the direction of withdrawal of the cradle.
  • the hook 40 is guided to facilitate its passage under the lyre thanks to lateral ears 41 cooperating with longitudinal grooves, not shown, formed in the lateral walls of the housing of the fuse holder.
  • the conductive contact element 32 is here formed of a metal plate placed at the rear of the protective cap 31, this plate having lateral ears for cooperating with the L-shaped notches, 33, of the lyre in the manner of a bayonet system. This form of element 32 ensures good mechanical strength of the assembly (which must withstand the pressure of the springs which apply the electrical contacts to the fuse ends).
  • the partial shutter preventing the introduction of a fuse without passing through the cradle when it is in a retracted position, is here constituted by a spout 54 molded with the cradle and located at the rear part thereof.
  • the electrical contact portion 25 capable of being energized, and which is applied against the rear end 28 of the fusiform b when in place (cap 31 closed), is constituted by a conductive pin U-shaped placed at the bottom of the fuse housing and returned by a spring 25 'towards the fuse.
  • a conductive withdrawal blade which would be of a high cost (in beryllium bronze) taking into account the large contact force which it is necessary to provide between conductor and fuse.

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  • Fuses (AREA)
  • Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)
EP19810400045 1980-01-15 1981-01-14 Elektrische Vorrichtung mit einem berührungssicheren Sicherungshalter Ceased EP0033675A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8000806 1980-01-15
FR8000806A FR2473781A1 (fr) 1980-01-15 1980-01-15 Porte-fusible de securite

Publications (1)

Publication Number Publication Date
EP0033675A1 true EP0033675A1 (de) 1981-08-12

Family

ID=9237550

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19810400045 Ceased EP0033675A1 (de) 1980-01-15 1981-01-14 Elektrische Vorrichtung mit einem berührungssicheren Sicherungshalter

Country Status (3)

Country Link
EP (1) EP0033675A1 (de)
ES (1) ES497555A0 (de)
FR (1) FR2473781A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3101225A1 (de) * 1980-02-25 1981-12-10 Wickmann-Werke Ag, 5810 Witten Leiterplattenhalter fuer einen schmelzeinsatz einer elektrischen sicherung
EP0282624A2 (de) * 1987-03-17 1988-09-21 Schurter AG Berührungssicherer elektrischer Sicherungshalter
FR2612688A1 (fr) * 1987-03-17 1988-09-23 Schurter Ag Porte-fusible electrique protege contre tout contact exterieur

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2332608A1 (fr) * 1975-11-24 1977-06-17 Telemecanique Electrique Sectionneur a cartouches fusibles

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2437802A (en) * 1946-05-13 1948-03-16 Melvin S Adler Electrical wall outlet

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2332608A1 (fr) * 1975-11-24 1977-06-17 Telemecanique Electrique Sectionneur a cartouches fusibles

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3101225A1 (de) * 1980-02-25 1981-12-10 Wickmann-Werke Ag, 5810 Witten Leiterplattenhalter fuer einen schmelzeinsatz einer elektrischen sicherung
EP0282624A2 (de) * 1987-03-17 1988-09-21 Schurter AG Berührungssicherer elektrischer Sicherungshalter
FR2612688A1 (fr) * 1987-03-17 1988-09-23 Schurter Ag Porte-fusible electrique protege contre tout contact exterieur
EP0282624A3 (en) * 1987-03-17 1990-01-31 Schurter Ag Touch proof electric fuse holder

Also Published As

Publication number Publication date
ES8201767A1 (es) 1982-01-16
FR2473781B1 (de) 1983-09-09
ES497555A0 (es) 1982-01-16
FR2473781A1 (fr) 1981-07-17

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19810925

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Effective date: 19840604

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Inventor name: RESPAUT, JACQUES