WO2002011163A1 - Safety load breaking switch - Google Patents

Safety load breaking switch Download PDF

Info

Publication number
WO2002011163A1
WO2002011163A1 PCT/SI2001/000021 SI0100021W WO0211163A1 WO 2002011163 A1 WO2002011163 A1 WO 2002011163A1 SI 0100021 W SI0100021 W SI 0100021W WO 0211163 A1 WO0211163 A1 WO 0211163A1
Authority
WO
WIPO (PCT)
Prior art keywords
fuse
seat
housing
contact
fuse seat
Prior art date
Application number
PCT/SI2001/000021
Other languages
French (fr)
Inventor
Domen Janc
Mitja KOPRIV¿EK
Original Assignee
Eti Elektroelement D.D.
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 Eti Elektroelement D.D. filed Critical Eti Elektroelement D.D.
Priority to AU2002227518A priority Critical patent/AU2002227518A1/en
Priority to PL01366163A priority patent/PL366163A1/en
Priority to SI200120052A priority patent/SI21054A/en
Priority to HU0400506A priority patent/HUP0400506A2/en
Publication of WO2002011163A1 publication Critical patent/WO2002011163A1/en

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H21/00—Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
    • H01H21/02—Details
    • H01H21/16—Adaptation for built-in fuse
    • H01H21/165—Fuses mounted on, or constituting the movable contact parts of, the switch
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2300/00—Orthogonal indexing scheme relating to electric switches, relays, selectors or emergency protective devices covered by H01H
    • H01H2300/046—Orthogonal indexing scheme relating to electric switches, relays, selectors or emergency protective devices covered by H01H using snap closing mechanisms

Definitions

  • the object of the invention is a safety load breaking switch with a housing taking two electrical contacts and a fuse exchangeably held in a fuse seat, the fuse together with the fuse seat being turnable into a switch-on position in which it connects both contacts, whereat the fuse seat is realized to be pulled out as a drawer kept in the housing.
  • the technical problem to be solved is to design a safety load breaking switch of this kind that makes possible a quicker switching on.
  • the contact arranged in the housing at the bottom of the insertion opening for the fuse seat is realized as a springing contact and, in the switch-on position, presses the fuse towards the second contact
  • the fuse seat includes a cam cooperating with a guiding contour realized in the housing in such a way that at the turning of the fuse seat, the fuse seat and the fuse are pulled deeper into the housing and the fuse presses the springing contact until, after passing the dead point, it springs back against the second contact.
  • an additional spring is arranged, which, in the switch- on position, gives an initial stress to the fuse seat in the direction in which the springing contact presses the fuse.
  • Fig. 1 a section through the safety load breaking switch in the state during the exchange of the fuse
  • Fig. 2 the safety load breaking switch in the switch-off position
  • Fig. 3 the safety load breaking switch during switching on
  • Fig. 4 the safety load breaking switch in the switch-on position.
  • the safety load breaking switch represented in Fig. 1 comprises a housing 10 made of insulating material, wherein a fixed contact 12 and a springing contact 14 are realized.
  • the springing contact 14 is supported by two relatively strong coil springs 16 on the lower housing wall. Either contact 12 and 14 is directly connected to terminals 18 and 20, respectively.
  • the upper housing wall facing the springing contact 14 forms an opening 22, which is laterally shifted with respect to the fixed contact 12.
  • the bottom 24 of the housing 10 and a housing lid not shown in the drawings form a guidetrack 26 for a fuse seat 28, which is guided in the housing 10 like a drawer.
  • the guidetrack 26 runs perpendicularly to the lower housing wall and then bends up towards the left edge of the opening 22.
  • the fuse seat 28 is represented in the pulled-out position, in which the fuse 30 can be inserted into the fuse seat.
  • Fig. 1 shows the fuse 30 in the position when it is partly pulled out of the fuse seat 28.
  • the fuse seat 28 In its upper area on the side facing the fuse 30, the fuse seat 28 is open and forms a grasp opening 32, which facilitates the grasping and the removal of the fuse 30.
  • the fuse 30 is completely inserted in the fuse seat, it is held by the springing tongues 34 in a position, in which its lower contact 36 faces the open lower end of the fuse seat.
  • the bottom 24 and the lid of the housing 10 form semicircular guide grooves 38, wherein an electroinsulating cover 40 shaped as a circular arch is movably guided.
  • An opening of the cover 40 is taken by the fuse seat 28 with a small tolerance so that the cover 40 closes the areas of the opening 22 lying outside the fuse seat 28 and especially blocks the access to the fixed contact 12.
  • the fuse seat 28 has a detent 42 which in the position shown in Fig. 1 lies on the inner side of the cover 40 and thus limits the pull-out movement of the fuse seat 28.
  • These cams 44 cooperate with guiding contours 46 realized on the bottom 24 and in the lid of the housing 10, which form a nose projecting downwards and run from the guidetrack of the fuse seat to the free end of the fixed contact 12.
  • the fuse seat When the fuse 30 is completly inserted in the fuse seat 28, the fuse seat can be pushed into the housing 10 along the guidetrack 26 as shown in Fig. 2. Then the lower part of the fuse seat 28 grasps, in the form of a fork, over the springing contact 14 and compresses a leaf spring 48, whereas the lower contact 36 of the fuse 30 lies on the contact 14.
  • the cam 44 finds itself at a height directly under the adjoining part of the guiding contour 46.
  • a transparent window 58 is formed, through which it is possible to read the indication arranged in the upper contact 52 of the fuse so that it can always be seen whether the fuse is conducting or burnt out. The reading is facilitated by the handle 50 being laterally displaced with respect to the longitudinal axis of the fuse seat.
  • the fuse seat 28 is, by a light downward pressure, again turned out of the switch-on position so that the conducting connection between the contacts 12 and 14 is interrupted and the fuse seat 28 returns to the position shown in Fig. 2. If necessary, the fuse seat 28 can again be pushed out in order to change the fuse.
  • the above-described safety load breaking switch can be provided with different fuses 30 suitable for different nominal loads. Since the outer contours of different fuse types differ, each time a fuse seat 28 with a correspondingly adapted inner contour is to be used. The exchange of the fuse seat 28 is made possible by the detent 42 being realized on a springing tongue, which can be pressed backwards by a tool in order to pull the fuse seat completely out of the housing 10.

Landscapes

  • Fuses (AREA)
  • Switch Cases, Indication, And Locking (AREA)

Abstract

A safety load breaking switch with a housing (10) taking two electrical contacts (12, 14) and a fuse (30) exchangeably held in a fuse seat (28), the fuse together with the fuse seat being turnable in a switch-on position in which it connects both contacts (12, 14), whereat the fuse seat (28) is realized to be pulled out as a drawer kept in the housing (10) is designed in such a way that the contact (14) arranged in the housing (10) at the bottom of the insertion opening for the fuse seat (28) is realized as a springing contact and, in the switch-on position, presses the fuse (30) towards the second contact (12), and that the fuse seat (28) includes a cam (44) cooperating with a guiding contour (46) realized in the housing (10) in such a way that, at the turning of the fuse seat, the fuse seat (28) and the fuse (30) are pulled deeper into the housing (10) and the fuse (30) presses the springing contact (14) until, after passing the dead point, it springs back against the second contact (12).

Description

Safety Load Breaking Switch
The object of the invention is a safety load breaking switch with a housing taking two electrical contacts and a fuse exchangeably held in a fuse seat, the fuse together with the fuse seat being turnable into a switch-on position in which it connects both contacts, whereat the fuse seat is realized to be pulled out as a drawer kept in the housing.
The technical problem to be solved is to design a safety load breaking switch of this kind that makes possible a quicker switching on.
This technical problem is solved by the invention in such a way that the contact arranged in the housing at the bottom of the insertion opening for the fuse seat is realized as a springing contact and, in the switch-on position, presses the fuse towards the second contact, and that the fuse seat includes a cam cooperating with a guiding contour realized in the housing in such a way that at the turning of the fuse seat, the fuse seat and the fuse are pulled deeper into the housing and the fuse presses the springing contact until, after passing the dead point, it springs back against the second contact.
Preferably, in the housing an additional spring is arranged, which, in the switch- on position, gives an initial stress to the fuse seat in the direction in which the springing contact presses the fuse.
In the continuation there will be explained a preferred embodiment of the invention with the reference to the drawings representing: Fig. 1 a section through the safety load breaking switch in the state during the exchange of the fuse, Fig, 2 the safety load breaking switch in the switch-off position, Fig. 3 the safety load breaking switch during switching on, Fig. 4 the safety load breaking switch in the switch-on position.
The safety load breaking switch represented in Fig. 1 comprises a housing 10 made of insulating material, wherein a fixed contact 12 and a springing contact 14 are realized. The springing contact 14 is supported by two relatively strong coil springs 16 on the lower housing wall. Either contact 12 and 14 is directly connected to terminals 18 and 20, respectively. The upper housing wall facing the springing contact 14 forms an opening 22, which is laterally shifted with respect to the fixed contact 12.
The bottom 24 of the housing 10 and a housing lid not shown in the drawings form a guidetrack 26 for a fuse seat 28, which is guided in the housing 10 like a drawer. In the lower area the guidetrack 26 runs perpendicularly to the lower housing wall and then bends up towards the left edge of the opening 22. In Fig. 1 the fuse seat 28 is represented in the pulled-out position, in which the fuse 30 can be inserted into the fuse seat. Fig. 1 shows the fuse 30 in the position when it is partly pulled out of the fuse seat 28. In its upper area on the side facing the fuse 30, the fuse seat 28 is open and forms a grasp opening 32, which facilitates the grasping and the removal of the fuse 30. When the fuse 30 is completely inserted in the fuse seat, it is held by the springing tongues 34 in a position, in which its lower contact 36 faces the open lower end of the fuse seat.
The bottom 24 and the lid of the housing 10 form semicircular guide grooves 38, wherein an electroinsulating cover 40 shaped as a circular arch is movably guided. An opening of the cover 40 is taken by the fuse seat 28 with a small tolerance so that the cover 40 closes the areas of the opening 22 lying outside the fuse seat 28 and especially blocks the access to the fixed contact 12. The fuse seat 28 has a detent 42 which in the position shown in Fig. 1 lies on the inner side of the cover 40 and thus limits the pull-out movement of the fuse seat 28.
Each of the outer surfaces of the fuse seat 28, which in Fig. 1 are turned towards the observer and away from him, forms a cam 44 that is raised with respect to the upper part of the fuse seat. These cams 44 cooperate with guiding contours 46 realized on the bottom 24 and in the lid of the housing 10, which form a nose projecting downwards and run from the guidetrack of the fuse seat to the free end of the fixed contact 12.
When the fuse 30 is completly inserted in the fuse seat 28, the fuse seat can be pushed into the housing 10 along the guidetrack 26 as shown in Fig. 2. Then the lower part of the fuse seat 28 grasps, in the form of a fork, over the springing contact 14 and compresses a leaf spring 48, whereas the lower contact 36 of the fuse 30 lies on the contact 14. The cam 44 finds itself at a height directly under the adjoining part of the guiding contour 46.
The upper part of the fuse seat 28, which still projects out of the housing 10, forms a handle 50 whereby the fuse seat 28 together with rase 30 can be turned clockwise in Fig. 2 around the lower contact 36 of the fuse 30. So the cam 44 slides on the guiding contour 46 and causes the fuse seat 28 and the fuse 30 to move together downwards in the course of the further turning movement. Thereby the springing contact 14 is pressed backwards against the force of the coil springs 16 as shown in Fig. 3. During the turning movement of the fuse seat 28, the cover 40 is taken along and shifted into the groove 38. Besides, it can be seen from Fig. 3 that the guiding contour 46 is lengthened upwards out through the groove 38, where it runs parallel to the guidetrack 26 so that the fuse seat 28 can only be turned when it is completely pushed into the housing.
In the situation shown in Fig. 3, the cam 44 just passes the nose of the guiding contour 46 projecting downwards. From this moment on the further turning of the fuse seat is supported by the resiliency of the contact 14 and of the coil springs 16, and the fuse 30 together with fuse seat is pressed upwards so that fuse seat and the fuse suddenly snap into the switch-on position as represented in Fig. 4. The upper contact 52 of the fuse then rests on the fixed contact 12. The springing contact 14 in this state does not completely reach its abutting position on a supporting wall 54 so that by the spring action of the contact 14 the necessary contact pressure is maintained between the contacts 12, 14 and the contacts 36, 52 of the fuse. The leaf spring 48 supports the upward movement of the fuse seat 28 into the snapping position.
In the upper front wall of the fuse seat 28, which is concealed in the drawings, a transparent window 58 is formed, through which it is possible to read the indication arranged in the upper contact 52 of the fuse so that it can always be seen whether the fuse is conducting or burnt out. The reading is facilitated by the handle 50 being laterally displaced with respect to the longitudinal axis of the fuse seat.
When the safety load breaking switch is to be switched off, the fuse seat 28 is, by a light downward pressure, again turned out of the switch-on position so that the conducting connection between the contacts 12 and 14 is interrupted and the fuse seat 28 returns to the position shown in Fig. 2. If necessary, the fuse seat 28 can again be pushed out in order to change the fuse.
The above-described safety load breaking switch can be provided with different fuses 30 suitable for different nominal loads. Since the outer contours of different fuse types differ, each time a fuse seat 28 with a correspondingly adapted inner contour is to be used. The exchange of the fuse seat 28 is made possible by the detent 42 being realized on a springing tongue, which can be pressed backwards by a tool in order to pull the fuse seat completely out of the housing 10.

Claims

Claims
1. A safety load breaking switch with a housing (10) taking two electrical contacts (12, 14) and a fuse (30) exchangeably held in a fuse seat (28), the fuse together with the fuse seat being turnable in a switch-on position in which it connects both contacts (12, 14), whereat the fuse seat (28) is realized to be pulled out as a drawer kept in the housing (10), characterized in that the contact (14) arranged in the housing (10) at the bottom of the insertion opening for the fuse seat (28) is realized as a springing contact and, in the switch-on position, presses the fuse (30) towards the second contact (12), and that the fuse seat (28) includes a cam (44) cooperating with a guiding contour (46) realized in the housing (10) in such a way that, at the turning of the fuse seat, the fuse seat (28) and the fuse (30) are pulled deeper into the housing (10) and the fuse (30) presses the springing contact (14) until, after passing the dead point, it springs back against the second contact (12).
2. Safety load breaking switch according to claim 1, characterized in that in the housing (10) a spring (48) is arranged, which, in the switch-on position, gives an initial stress to the fuse seat (28) in the direction in which the springing contact (14) presses the fuse (30).
PCT/SI2001/000021 2000-07-28 2001-07-25 Safety load breaking switch WO2002011163A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AU2002227518A AU2002227518A1 (en) 2000-07-28 2001-07-25 Safety load breaking switch
PL01366163A PL366163A1 (en) 2000-07-28 2001-07-25 Safety load breaking switch
SI200120052A SI21054A (en) 2000-07-28 2001-07-25 Safety load breaking switch
HU0400506A HUP0400506A2 (en) 2000-07-28 2001-07-25 Safety load breaking switch

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE20013044.7 2000-07-28
DE20013044U DE20013044U1 (en) 2000-07-28 2000-07-28 Fuse switch disconnector

Publications (1)

Publication Number Publication Date
WO2002011163A1 true WO2002011163A1 (en) 2002-02-07

Family

ID=7944513

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SI2001/000021 WO2002011163A1 (en) 2000-07-28 2001-07-25 Safety load breaking switch

Country Status (7)

Country Link
CN (1) CN1449571A (en)
AU (1) AU2002227518A1 (en)
DE (1) DE20013044U1 (en)
HU (1) HUP0400506A2 (en)
PL (1) PL366163A1 (en)
SI (1) SI21054A (en)
WO (1) WO2002011163A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2320445B1 (en) * 2009-11-05 2014-03-12 Eti Elektroelement D.D. Security electric switch with a melting member
DE102011087492A1 (en) * 2011-11-30 2013-06-06 Wöhner GmbH & Co. KG Elektrotechnische Systeme Switching device for switching an electrical component in a current path

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2499763A1 (en) * 1981-02-09 1982-08-13 Schupa Elektro Gmbh & Co Kg Circuit breaker with replaceable cartridge fuse - which is held by spring biassed support pivoted between working position and fuse replacement position
DE29912855U1 (en) * 1999-07-22 1999-10-14 Bruchmann Klaus Switch fuse unit and fuse plug with contact guide element
DE29919140U1 (en) * 1999-10-30 1999-12-30 Eti Elektroelement Dd Switch with fuse unit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2499763A1 (en) * 1981-02-09 1982-08-13 Schupa Elektro Gmbh & Co Kg Circuit breaker with replaceable cartridge fuse - which is held by spring biassed support pivoted between working position and fuse replacement position
DE29912855U1 (en) * 1999-07-22 1999-10-14 Bruchmann Klaus Switch fuse unit and fuse plug with contact guide element
DE29919140U1 (en) * 1999-10-30 1999-12-30 Eti Elektroelement Dd Switch with fuse unit

Also Published As

Publication number Publication date
AU2002227518A1 (en) 2002-02-13
DE20013044U1 (en) 2001-11-29
SI21054A (en) 2003-04-30
PL366163A1 (en) 2005-01-24
HUP0400506A2 (en) 2004-05-28
CN1449571A (en) 2003-10-15

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