Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H3/00—Mechanisms for operating contacts
  • H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
  • H01H3/022—Emergency operating parts, e.g. for stop-switch in dangerous conditions
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
  • H01H13/50—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member

Definitions

• the present invention relates to a switching assembly.
• the invention more particularly relates to a switching assembly for assembly on a control assembly to form an emergency stop type switching device.
• an emergency stop device comprises a control assembly carrying an actuating member and a switching assembly also called a contact block intended to be mounted at the rear of the control unit.
• the switching assembly comprises a movable bridge supporting movable contacts actuated by the actuating member with respect to fixed contacts from a closed position to an open position to open an electrical circuit in an emergency.
• the main contacts are therefore of normally closed type.
• the control assembly and the switching assembly are mounted mechanically on either side of a wall.
• the switching assembly is therefore invisible to the user. It is therefore impossible for the user to know continuously whether the control assembly is properly mounted on the switching assembly. But a stall of one of the sets relative to the other no longer allows the device to work properly. Since an emergency stop device is intended to exercise a safety function, it is necessary that this device functions properly. For this, it is necessary to ensure that the switching assembly is hooked to the control assembly when the emergency stop device is operated.
• the object of the invention is to propose a new solution to ensure that the control assembly is properly mounted on the switching assembly.
• This solution is simple in operation and is made in a limited space.
• a switching assembly intended to be assembled on a control assembly provided with an actuating member that can assume a rest position and an actuating position, the switching assembly comprising:
• an actuation switch of the normally closed type comprising at least a first fixed actuating contact and a movable actuating support carrying at least a second movable actuating contact capable of cooperating with the first fixed actuating contact for controlling an electric circuit according to the position of the actuating member
• a normally open type detection switch connected in series with the operation switch and comprising at least a first detection contact and a movable detection support carrying at least a second mobile detection contact with respect to the first detection contact and adapted to cooperate with the first detection contact for controlling the electric circuit
• the first detection contact of the detection switch being integral in motion with the mobile operating support.
• the detection switch is arranged to be open when the control assembly is mechanically disconnected from the switching assembly.
• the first detection contact of the detection switch is formed on the mobile operating support.
• the first detection contact of the detection switch is made in the same plane as the second operating contact of the operating switch.
• the detection switch comprises two mobile detection contacts able to cooperate each with a separate detection contact made on the mobile operating support and the mobile operating support comprises two electrically conductive half-plates. assembled on a piece of insulating material and each carrying a detection contact of the detection switch.
• the mobile detection support comprises a conductive part comprising the two mobile detection contacts.
• the switching assembly comprises an actuating pusher intended to act on the mobile actuating support and actuable by the actuating member of the control assembly and a detection pusher intended to act on the mobile detection support.
• the actuating pusher and the sensing pusher are nested and coaxial.
• the switching assembly comprises a contact pressure spring positioned between the detection pusher and the mobile detection medium.
• the switching assembly comprises an opening spring positioned between the sensing pusher and the movable actuating support.
• the switching assembly comprises a housing, a main spring being positioned between the housing and the movable actuating support.
• the switching assembly comprises stop means arranged to open the detection switch when opening the operating switch.
• the invention also relates to an emergency stop type switching device comprising a control assembly intended to be mechanically connected to a switching assembly as defined above.
• FIG. 1 represents the emergency stop device of the invention
• FIGS. 2A to 5B show, in two perpendicular axial transverse sections, the switching assembly of the device in its different operating phases
• FIG. 6 represents, in perspective and in exploded view, the switching assembly of the invention
• an emergency stop type device also called a punch switch, comprises two separate sets 1, 2 formed of a control unit, hereinafter referred to as the first set 1, and a switching assembly. , hereinafter referred to as second set 2.
• the first assembly 1 comprises an actuating member 10 to be depressed in an emergency by the operator along a control axis (X) to open an electrical circuit.
• the actuating member 10 can thus take a rest position ( Figure 1), in which it is not depressed, leaving the electrical circuit closed and an actuating position in which it is depressed to open the electrical circuit.
• the second set 2 is a contact block for controlling the electric circuit.
• This second assembly 2 comprises a housing 20 (FIG. 6), for example made of plastic, having hooking means 21a, 21b to the first assembly 1.
• the housing 20 contains an actuating switch for controlling the electrical circuit according to the position of the actuating member 10.
• the housing 20 also contains a detection switch for monitoring that the second set 2 is well hooked on the first set 1 while keeping the electrical circuit open as the first set 1 is mechanically disconnected from the second set 2.
• the actuating switch comprises a set of normally closed operating contacts, also called an open contact, and the detection switch has a set of normally open sense contacts, also called closed contacts. The operation switch and the detection switch are connected in series to the electrical circuit to be controlled.
• the actuating switch comprises a movable actuating support 3 and a main spring 4 which is positioned between the movable actuating support 3 and the housing 20.
• the movable actuating support 3 consists of two half conductive plates 30, 31 of electricity assembled on a central piece 32 which is made of insulating material, for example plastic, this central piece 32 being mounted on the main spring 4.
• Each half-plate 30, 31 carries at its end a actuating contact 300, 310 movable adapted to cooperate with a corresponding fixed actuating contact 200, 210 for controlling the electrical circuit.
• the movable actuating support 3 is initially in a closed position of the contacts and is able to move to an open position when the actuating member 10 is depressed in its actuating position.
• the detection switch comprises, for its part, a mobile detection support 5, an opening spring 6 and a contact pressure spring 7.
• the mobile detection medium 5 comprises a conductive piece 50 of electricity having a hat-shaped cross-section carrying at each end a movable detection contact 501, 51 1.
• the detection contacts 301, 31 1 corresponding to the two mobile detection contacts 501, 51 1 are said "fixed” detection contacts and are made on the mobile actuating support 3, so that they are integral in motion mobile movable support 3.
• These contacts 301, 31 1 are in fact fixed on the mobile operating support when the latter is in the closed position or in the open position but move with the mobile actuating support 3 when this one changes position.
• the set of detection contacts is placed between the two sets each formed of a fixed actuating contact and a movable actuating contact.
• the mobile actuating support 3 and the movable detection support 5 are displaceable in translation along the control axis (X).
• the movable actuating support 3 is initially in a closed position in which its actuating contacts are closed and is able to move to an open position in which its actuating contacts are open.
• the mobile detection support 5 is initially in an open position in which its detection contacts are open and is able to move towards a position of closure in which its detection contacts are closed.
• the conductive part 50 provides, via the detection contacts, the electrical continuity between the two conductive half-plates 30, 31 of the mobile operating support 3.
• the electric circuit is closed.
• the second set 2 comprises an actuating device cooperating with the actuating member 10 of the first set 1.
• This device comprises an actuating pusher 8 and a detection pusher 9 arranged to act respectively on the mobile actuating support 3 and on the mobile detection medium 5.
• the actuating pusher 8 can be actuated by the actuating member 10 to open the electric circuit.
• the sensing pusher 9 can be actuated when the first set 1 is mechanically connected to the second set 2, so as to move the movable detection medium 5 to close the electrical circuit.
• the two pushers 8, 9 are coaxial and nested, the detection pushbutton 9 being able to slide in the actuating pusher 8.
• the two pushers 8, 9 are each capable of taking a rest position in which they protrude outside the contact block and a working position in which they are moved inwardly of the contact block.
• the detection pusher 9 (FIG. 6) comprises an upper part consisting of a head 90 against which the actuating member 10 of the first assembly 1 can be supported, extended by an intermediate portion formed by two parallel uprights a slide mechanism for the conductive part 50 of the mobile detection support 5, the contact pressure spring 7 bearing on the one hand against the movable detection support 5 and on the other hand against the head 90 of the detection pusher 9
• the detection push-button 9 terminates in a lower part in which the opening spring 6 is housed, the latter being arranged between the movable actuating support 3 and the detection push-button 9.
• the detection push-button 9 and the mobile detection support 5 are thus arranged so as to slide relative to each other along the control axis (X).
• the actuating pusher 8 (FIG. 6) comprises a parallelepipedal main body provided on two opposite faces with two symmetrical fins 80. intended to rest against the body 20 of the contact block when it is urged by the opening spring 6 towards its rest position. It also comprises a central opening 81 inside which the detection pusher 9 is arranged, the head 90 of the detection pusher 9 comprising a collar held in abutment against the actuating pusher by means of the opening spring 6.
• the actuating pusher 8 also comprises two symmetrical members 82 protrudingly extending, parallel to the control axis (X), in the direction of the movable actuating support.
• the detection pushbutton 9 is biased towards its rest position by the opening spring 6 and drives the actuating pusher 8 towards its rest position.
• the detection push-button 9, biased towards its rest position by the opening spring 6, keeps the mobile detection support 5 in the open position.
• the first assembly 1 is mechanically assembled on the second assembly 2, which causes the detection pusher 9 towards the inside of the contact block in contact with the opening spring 6. Under the action of the detection pusher 9 and the spring contact pressure 7, the mobile detection medium 5 goes down in the closed position.
• FIGS. 7A to 7C show an improvement of the switching assembly of the invention. This improvement makes it possible to ensure that the detection contacts do not remain soldered, which improves the overall safety of the emergency stop device. For this, when opening the actuation switch, the detection switch also opens.
• FIGS. 7A to 7C thus show a configuration different from that represented in FIGS. 5A and 5B.
• the precise solution consists, for example, in arranging stop means on the path of the movable detection support 5 when the actuating switch is opened.
• the mobile detection support 5 comes into contact with the stop means 220 made on the housing 20 of the switching assembly while the mobile support actuator 3 completes its opening stroke, thus also causing the opening of the detection switch.
• the contact pressure spring 7 is compressed between the mobile detection support 5 and the detection pusher 9.

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• Push-Button Switches (AREA)
• Mechanisms For Operating Contacts (AREA)

Applications Claiming Priority (2)

Publications (2)

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Cited By (1)

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• 2010
  • 2010-04-29 FR FR1053328A patent/FR2959590B1/fr not_active Expired - Fee Related
• 2011
  • 2011-04-06 EP EP11713751.3A patent/EP2564408B1/de active Active
  • 2011-04-06 CN CN201180014888.9A patent/CN102804304B/zh active Active
  • 2011-04-06 WO PCT/EP2011/055324 patent/WO2011134766A1/fr active Application Filing

Non-Patent Citations (1)

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