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
  • H01H13/62—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 the contact returning to its original state upon manual release of a latch
• • 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
  • H01H13/02—Details
  • H01H13/023—Light-emitting indicators
• • 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
  • H01H2003/0246—Resetting of bistable emergency operating part by rotating itself or an accessory
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
  • H01H9/16—Indicators for switching condition, e.g. "on" or "off"
  • H01H9/161—Indicators for switching condition, e.g. "on" or "off" comprising light emitting elements

Definitions

• the present invention relates to an emergency stop device adaptable to a human-machine dialogue system.
• the emergency stop device In a human-machine dialogue system of the type described in the patent application WO201 1/073108 and which comprises several human-machine dialogue elements such as pushbutton, indicator light, it is also possible to provide a device emergency stop.
• the emergency stop device In such a system, the emergency stop device must have a particularly compact architecture, particularly in depth and must have a footprint equivalent to that of other human-machine dialogue devices used in the system.
• the object of the invention is therefore to provide an emergency stop device compact enough to be used in a human-machine dialogue system of the type described in the patent application cited above.
• the object of the invention is also to provide an emergency stop device with reliable operation, in which, in case of welding, it is possible to easily separate the contacts.
• an emergency stop device comprising a body, a control button movable in translation along a control axis, at least one set of normally closed type electrical contacts comprising a movable electrical contact and a fixed electrical contact, a flexible blade having a fixed first end and a second free end and an actuation pusher operable in translation by said control button between a position of rest and a position actuated and adapted to cooperate with the flexible blade, said actuating pusher having an actuating tab arranged to exert a displacement force on the flexible blade, said displacement force being exerted in an actuation plane, the flexible blade comprising:
• a third section connected to the second section and carrying the movable electrical contact.
• the first section is connected to the second section by a first bend
• the second section is connected to the third section by a second bend
• the flexible blade comprises a rib formed on the first bend and a rib formed on the second bend.
• the first section has a rectilinear shape.
• the requirement of compactness of the device is notably allowed by the use of a simple flexible blade.
• this use has some constraints because the flexible blade must still be able to withstand a significant mechanical force if desoldering contacts must be operated. In the area where the desoldering force is exerted, the flexible blade must therefore be stiff enough not to bend.
• the device comprises a contact pressure spring positioned between the flexible blade and the body.
• the device comprises a printed circuit on which the fixed electrical contact is made.
• the device comprises an opening spring arranged between the control knob and the actuating pusher.
• the device comprises a trigger member cooperating with the actuating pusher and with the body and having an abutment position in which it maintains the actuating pusher in its rest position and an actuated position in which it releases the actuating pusher under the action of the opening spring.
• control button is movable between two extreme positions, a rest position and an actuated position in which the control button bears against a fixed stop of the body.
• the device comprises a light assembly assembled on the printed circuit.
• the device comprises a guide rod oriented along the control axis and passing through the printed circuit and the actuating member and being inserted into an axial housing of the control button.
• the invention also relates to a human-machine dialogue system which comprises:
• a first part including a data processing unit and a power supply unit
• a second part comprising a plurality of man-machine dialogue members each having a man-machine dialogue interface and a fixing support arranged to receive each human-machine dialogue member removably and interchangeably,
• At least one of the several man-machine dialogue members being constituted by an emergency stop device as described above.
• FIG. 1 shows, exploded, a man-machine dialogue system able to accommodate the emergency stop device of the invention
• FIG. 2 represents, assembled together, the human-machine dialogue system of FIG. 1,
• FIG. 3 represents the emergency stop device of the invention
• FIG. 4 is an exploded view of the emergency stop device of the invention
• FIGS. 5 and 6 show, in a first axial section, the emergency stop device of the invention in which the control button is in the idle state and in the actuated state respectively
• FIGS. 8 show, seen in a second axial section, the emergency stop device of the invention in which the control knob is respectively in the idle state and in the actuated state
• FIG. 9 represents, in perspective, the flexible blade used in the device of the invention.
• an emergency stop device is intended for the control of an electrical circuit and can be actuated by an operator to open the electrical circuit in case of emergency.
• the emergency stop device of the invention is adapted to be used in a man-machine dialogue system of the type shown in FIGS. 1 and 2.
• This man-machine dialogue system is intended to receive several organs. human-machine dialogue on the same support.
• One of the man-machine dialogue organs is for example the emergency stop device of the invention.
• the man-machine dialogue system comprises a first part 1 comprising a data reading / writing station and a second part comprising the man-machine dialogue members 2 each having a man-machine dialogue interface, processing means and for example a memory.
• the first part 1 and the second part are interconnected by wired or wireless communication means. In FIG. 1, they are connected together by means of a communication and power supply bus 4 making it possible to carry out the communication between the read / write station and each man-machine dialogue unit 2 and the power supply. between the read / write station and the man-machine dialogue members 2.
• This communication and power supply bus 4 is for example made on two distinct conducting lines, a first conducting line 40 connected to a non-zero electrical potential and enabling to allow both the feed current of the man-machine dialogue elements 2 and the communication frames exchanged between the read / write station and the man-machine dialogue elements 2 to pass, and a second conductive line 41 with potential neutral electric.
• the read-write station and the different human-machine dialogue elements 2 exchange data on the communication and power supply bus 4 by using a simple communication protocol.
• the communication means can be made wirelessly, for example by using wireless interfaces operating by RFID.
• the second part of the system comprises a fixing support 3 capable of accommodating in a removable and interchangeable manner one or more man-machine dialogue members 2 of the type described above.
• the fixing support 3 comprises, for example, two parallel conducting rails extending the two conducting lines 40, 41 and on which each man-machine dialogue unit 2 can come to connect.
• the human-machine dialogue system is thus realized by connecting the first part 1 to the second part with the communication and power supply bus 4.
• This system is particularly suitable to be positioned on the door of a cabinet or on a console.
• the system of the invention can thus replace buttons or lights individually mounted on the door of the cabinet or on the control panel.
• the door of the cabinet or the control panel is represented in the form of a single wall 5. As shown in FIGS.
• the emergency stop device intended to be used as a man-machine dialogue device in a system as described above consists of a box 21 of square shape, of at least two electrical contacts 22a, 22b made on the outside of the housing 21, a printed circuit 23 mounted inside the housing, a front 24 enclosing the housing and a movable control knob 20 mounted on the facade and able to move along a control axis (X). It may include processing means, such as a microprocessor and a memory for storing data representative of its state.
• the processing means and the memory are assembled on the printed circuit 23 and connected to the electrical contacts 22a, 22b made on the housing 21, said electrical contacts 22a, 22b being intended to connect to the communication and power supply bus 4 when the device is inserted into the mounting bracket 3 of the system.
• the front panel 24 comprises a body provided with a central opening and formed of a cylindrical collar 240 formed at the periphery of the central opening, of an internal cylindrical sleeve 241 and of a bowl 242 defined between the collar 240 and the sleeve. 241.
• the device comprises a helical type return spring R1 housed in the bowl 242 and biased along the control axis (X) by the control knob 20.
• the control knob 20 is initially in a rest position (FIGS. 7) in which the controlled electric circuit is closed.
• the control button 20 can be brought into a stop position against the body of the facade 24, thus allowing the electrical circuit to be opened positively.
• the control button 20 is released but then remains hooked in an actuated position ( Figures 6 and 8) in which the electrical circuit is open. The electrical circuit remains open until the device is unlocked.
• the emergency stop device of the invention also comprises an actuating pusher 12 hooked to the control button 20 by means of fixing members made on the control button 20.
• the actuating pusher 12 comprises an axial central bore and a collar 122 located at the periphery of said bore defining a seat intended to receive an opening spring R2 bearing on the one hand against the actuating pusher 12 and on the other hand against the control knob 20.
• the actuating pusher 12 is biased in translation along the control axis by the opening spring R2 against the fasteners.
• the button 20 and the actuating pusher 12 are free in translation towards one another by compression of the opening spring R2. When the control knob 20 is in the rest position, the actuating pusher 12 is in a rest position (FIGS. 5 and 7).
• the actuating pusher 12 When a pressure is exerted on the control knob 20 towards its actuated position, the actuating pusher 12 remains first in the rest position, resulting in a compression of the opening spring R2 to store energy. When the opening spring R2 is sufficiently compressed, the actuating pusher 12 is released suddenly, driven by the energy stored by the opening spring R2. The actuating pusher 12 is then in the actuated position. After actuation, the actuating pusher 12 remains hooked in the actuated position and maintains, via the fasteners, the control knob 20 in the inwardly actuated position of the body 10. If the control button 20 is released , it remains in the actuated position. Unlocking is then necessary to return the control knob and the actuating pusher to their rest position.
• the emergency stop device also comprises a trigger member 120 and an attachment member 121 (FIGS. 2, 5 and 6), for example each composed of a finger which is housed in a radial housing made on the pushbutton of FIG. 12.
• Each of these two members is mounted on a helical spring R3, R4 so as to be able to move radially relative to the control axis (X).
• the trigger member 120 and the attachment member 121 are positioned to cooperate each with the body of the facade 24 according to the position of the control knob 20.
• the trigger member 120 and the fastening member 121 are capable of moving in two distinct parallel planes, perpendicular to the control axis (X).
• the plane of translation of the trigger member 120 is located above the plane of translation of the attachment member 121.
• the body of the facade On the inner surface of its central opening, the body of the facade comprises cam shapes intended to be followed by the trigger member 120 and the attachment member 121, allowing each of these organs to perform their function.
• the tripping member 120 cooperates with the body of the facade to keep the actuating pusher 12 in the rest position until sufficient energy is stored in the opening spring R2.
• the control knob 20 is sufficiently depressed, under the action of a cam formed on the body of the facade 24, the trigger member 120 is retracted into its housing to release the actuating pusher 12 under the action of the opening spring R2.
• the actuating pusher 12 then also maintains the control knob 20 in the actuated position towards the inside of the body.
• the attachment member 121 cooperates with an abutment made on the body of the facade 24 to allow to hang the actuating pusher 12 to the body when the control knob 20 is depressed in its actuated position and thus to maintain the pusher actuator 12 and the control knob 20 in their actuated position.
• the actuating pusher also comprises an actuating tab 123 located at the periphery, in a plane parallel to the planes containing the trigger member 120 and the attachment member 121. The actuating tab 123 is actuated according to an actuation plane located in an axial plane of the button.
• the emergency stop device comprises means for unlocking the control button implemented for example by rotating the control knob 20 around the control axis (X). During the rotation of the control knob 20, the latter rotates the actuating pusher 12. The rotation of the actuating pusher 12 releases the fastening member 121 from its abutment and allows, under the action of the return spring R1, to return the control knob 20, and therefore the actuating pusher 12, to their rest position.
• the emergency stop device may also include a light assembly assembled on the printed circuit 23 and intended to provide a light signaling function of the emergency stop device.
• This luminous assembly comprises, for example, several light-emitting diodes.
• the light assembly is for example controlled to turn green or red emergency stop device according to the operating state of the latter.
• Light guides may be provided to let light from the light assembly to a transparent crown 18 provided under the control button.
• a device for guiding the elements of the device can be provided.
• This guiding device consists of a rod 210, for example metal, having a first end fixed to the bottom of the housing 21, said rod extending, along the control axis (X), through the printed circuit 23, the central drilling of the actuating pusher 12 and the opening spring R2 and having a second end which is housed in a housing made in the control knob 20.
• the device also comprises a set of electrical contacts composed of a movable electrical contact 70 and a fixed electrical contact 71 made on a surface of the printed circuit 23, preferably on the lower surface thereof.
• the movable electrical contact 70 is carried by a flexible blade 6 located under the printed circuit and having a first end fixed to the printed circuit 23, preferably on the lower surface thereof, and a second free end near which is located the moving electrical contact 70.
• the flexible blade 6 can take a first rest position, in which the contacts are closed, and an actuated position in which the contacts are open.
• the flexible blade 6 is arranged to cooperate with the actuating pusher 12 in order to control the electrical circuit.
• the flexible blade 6 is shaped so as to form a rigid bearing zone for the actuating lug 123 of the actuating pusher.
• the flexible blade 6 comprises a first section 60 fixed by the first end to the printed circuit 23, extended by a second section 61 and then by a third section 62.
• the first section 60 and the second section 61 are interconnected by a first bend 63 and the second section 61 and the third section 62 are interconnected by a second bend 64.
• the third section 62 carries the movable electrical contact 70, located opposite the fixed electrical contact 71.
• the flexible blade 6 comprises at least one rib 65, 66 made by stamping.
• the three sections 60, 61, 62 are made rectilinearly.
• the second section 61 of the flexible blade 6 is made in a plane located in the actuation plane defined above.
• the displacement force generated by the actuating tab 123 is applied to the flexible blade 6 in the actuation plane, which makes it possible to avoid a deflection of the flexible blade in the bearing zone.
• the ribs 65, 66 are made towards the inside of the elbow. The presence of the two elbows, and the addition of the ribs makes it possible to stiffen the flexible blade in the zone of support of the actuating tab 123. Thanks to this arrangement and to the rectilinear shape of the first section 60, the flexible blade 6 can undergo significant mechanical stress without bending in its support zone, thus opening the electrical contacts if they were welded.
• the device also comprises a contact pressure spring R5 assembled between the flexible blade 6 and the housing 21 and located under the third Part 62 of the flexible blade 6. It is intended to ensure the contact pressure of the movable electrical contact against the fixed electrical contact when the contacts are closed. When the actuating pusher is in the actuated position, it is caused to push the flexible blade 6 and to compress this spring R5.
• the device may comprise two sets of normally closed type contacts and therefore two flexible blades and two contact pressure springs.

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• Push-Button Switches (AREA)
• Mechanical Control Devices (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=46640676

Family Applications (1)

Country Status (5)

Families Citing this family (10)

Family Cites Families (8)

• 2011
  • 2011-09-07 FR FR1157926A patent/FR2979747B1/fr not_active Expired - Fee Related
• 2012
  • 2012-08-03 CN CN201280042930.2A patent/CN103765537B/zh active Active
  • 2012-08-03 US US14/239,420 patent/US9349550B2/en active Active
  • 2012-08-03 EP EP12745680.4A patent/EP2754162B1/de active Active
  • 2012-08-03 WO PCT/EP2012/065280 patent/WO2013034379A1/fr not_active Ceased

Non-Patent Citations (1)

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