EP0232656A1 - Elektrischer Tastschalter - Google Patents

Elektrischer Tastschalter Download PDF

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Publication number
EP0232656A1
EP0232656A1 EP86402940A EP86402940A EP0232656A1 EP 0232656 A1 EP0232656 A1 EP 0232656A1 EP 86402940 A EP86402940 A EP 86402940A EP 86402940 A EP86402940 A EP 86402940A EP 0232656 A1 EP0232656 A1 EP 0232656A1
Authority
EP
European Patent Office
Prior art keywords
circuit
contact elements
housing
switch according
push
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Withdrawn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
EP86402940A
Other languages
English (en)
French (fr)
Inventor
Pascal Moury
Jean-Paul Viennois
René Ducruet
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.)
Dav Dite Ste
Dav SA
Original Assignee
Dav Dite Ste
Dav SA
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 Dav Dite Ste, Dav SA filed Critical Dav Dite Ste
Publication of EP0232656A1 publication Critical patent/EP0232656A1/de
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding
    • H01H1/40—Contact mounted so that its contact-making surface is flush with adjoining insulation
    • H01H1/403—Contacts forming part of a printed circuit

Definitions

  • the invention relates to electrical push-button switches, monostable or, most often bistable, usable in numerous applications, in particular in the electrical equipment of motor vehicles.
  • these switches comprise, on the one hand, a housing the bottom of which carries external connection plugs internally connected to fixed contact elements housed in said housing, and on the other hand, a push button recalled by a spring and carrying at least one actuating member of at least one movable contact element adapted to cooperate, each with one of the corresponding fixed contact elements housed in the housing.
  • the movable contact elements are carried by the push button and cooperate directly with the fixed contact elements carried by the housing, while in others, they are also carried by the housing, but in in all cases, the actuating members of the movable contact elements are obviously carried by the push-button or in mechanical connection with the latter.
  • the fixed contact elements belong to a pre-established monobloc circuit (printed or cut) or possibly stamped, which has a first flat part located in the bottom of the housing and the tracks are directly connected to the external connection plugs, and at least one second substantially flat lateral part adjoining said first part and raised against the internal face of a corresponding lateral wall of the housing, this lateral part carrying the fixed contacts.
  • LUCAS monobloc circuit
  • the positioning and precise positioning of all the fixed contact elements in the housing of the device are facilitated.
  • the entire monobloc circuit can be previously manufactured flat with its central part corresponding to the bottom of the device and with one or two side parts adjoining the central part and corresponding to the part or parts which will come later place against the internal face of the wall of the housing.
  • the manufacturing of the pre-established circuit, as well as its mounting in the switch housing can be partially mechanized, which makes it possible to reduce the delicate operations carried out until now by hand.
  • the movable contacts are carried either by the pre-established circuit (printed or cut), or directly by the push-button itself.
  • the subject of the invention is an electrical switch with a push button, monostable or bistable, comprising, on the one hand, a housing whose bottom carries external connection plugs internally connected to fixed contact elements housed in said housing and, on the other hand, a push button recalled by a spring and connected to at least one element actuating at least one movable contact element adapted to cooperate each with one of the corresponding fixed contact elements housed in the housing, the aforementioned fixed contact elements belonging to a pre-established monobloc circuit which comprises a first flat part located in the bottom of the housing and the tracks of which are connected directly to the external connection plugs and which comprises at least a second lateral part adjoining said first part and raised against the internal face of a corresponding side wall of the housing, said switch being characterized in that the movable contact elements are carried by one of the two members comprising the push-button and the pre-established monobloc circuit.
  • the monostable push button electric switch shown in FIGS. 1 to 4 comprises a housing 1 and a push button 2, both made of insulating material.
  • the housing 1 consists of a tubular body 3 of square section in the example and an independent bottom 4 on the structure of which we will return later.
  • the push button 2 is mounted to slide longitudinally in the body of the housing and is returned towards the outside by a spring 6; the amplitude of its travel is limited, in both directions, by two lateral pins 7 (see in particular Figures 1 and 4) which abut against one or the other of the two ends of two longitudinal slots 8 formed in two walls opposite sides of the body 3 of the housing.
  • the device obviously includes fixed contact elements and mobile contact elements, the latter being, in the present embodiment, carried by the push button.
  • the fixed contact elements eight in number in the example, are grouped in two pairs 11-12, 13-14 against the internal face of a side wall of the body and two pairs 15-16, 17-18 against the internal face of the opposite side wall of said body. All these fixed contact elements are constituted in the embodiment of Figures 1 to 4, by tracks of a printed circuit designated as a whole by 19 on flexible support 20 made of polyester for example, but, as will be seen in this which follows, with reference to FIGS. 5 to 10, the tracks of the circuit can be formed by cutting from a metal sheet or plate.
  • the different tracks of the printed circuit are connected directly, by one of their ends, to external connection plugs 21-22, 23-24, 25-26 and 27-28 respectively, grouped in the central part 19A of the circuit reinforced by a plate of insulating material which itself constitutes the bottom 4 of the housing mentioned above.
  • the two end parts 19B, 19C of the printed circuit 19 are raised on either side of its central part 19A and applied, respectively, against the internal face of two opposite walls of the body, by means of two plates of reinforcement 31, 32.
  • the printed circuit 19, before it is mounted in the housing initially appears completely flat according to the configuration that can be seen in FIG. 2, constituted by the central part 19 A shown in solid lines and supplemented by the two lateral parts 19B, 19C assumed to be folded flat and shown in broken lines in which the distal ends 11A and 15 A of tracks 11 and 15 have been indicated, by way of example.
  • the movable contact elements are carried by the push button 2. They are associated in pairs which correspond to the pairs of fixed contact elements. Thus, one can see, in FIGS. 3 and 4, the two movable contact elements 41, 42 adapted to come to be applied, respectively, against the two fixed contact elements 11, 12. In FIG. 4, we can also see the two movable contact elements 43, 44 which cooperate with the tracks 13, 14 and, in FIG. 1, the movable contact elements 45, 46 which cooperate with the tracks 15, 16.
  • Each pair of elements of movable contact consists of the distal ends of two flexible metal blades for example the blades 51, 52 ( Figure 4) which form the two branches of a fork whose central part 59 is fitted in the push button 2.
  • This part central unit 59 therefore plays two roles, namely: a first mechanical role of support and actuation of the movable contact elements 41, 42 and a second electrical role of permanent short circuit of these same two movable elements and, therefore, of short -temporary circuit of the two corresponding fixed contact elements.
  • the body 3 of the housing has a central longitudinal partition 61 which has four longitudinal ribs 62, 63, 64, 65 located in the intervals between the two fork legs of the four pairs of movable contact elements, respectively; thus the rib 62 is located between the two blades 51, 52.
  • the edge of each of these ribs constitutes a cam which controls the movement of the contact blades; it comprises a first part 66, for example, inclined in the direction which imposes an increasing stress on the flexible blade 52 during a first part of the push-button pushing stroke and a second part 67 parallel to the direction d pressing the push button.
  • Each blade, 52 for example, has a boss 68 on its inner face, that is to say that facing the axis of the device, this boss being adapted to slide against the cam 66, 67.
  • the operation of the apparatus is as follows: in the standby position, all the organs of the apparatus occupy their respective positions shown in solid lines in the drawings; in particular, for example, the boss 68 of the movable contact blade 52 is located very close to the inclined part 66 of the cam, while the end boss 42 of the same blade, that is to say the 'movable contact element itself is located away from the corresponding fixed contact element, in this case track 12 of the printed circuit.
  • the blade 52 sinks deeper into the housing at the same time as its boss 68 is pushed outwards by the inclined part 66 of the cam; the movable contact element 42 constituted by the distal end of the blade therefore approaches the bottom of the housing and ends up being applied against the fixed track 12 as shown in broken lines in FIG. 1.
  • the other blade 51 which constitutes the second branch of the fork, the first branch of which is formed by the blade 52, is inserted in the same way towards the bottom of the housing and its movable contact element 41 finally comes to bear against the track 11 of the printed circuit.
  • the two tracks 11 and 12 are short-circuited and the two external plugs 21 and 22 are therefore themselves also short-circuited.
  • the elastic blades 51, 52 undergo reverse deformations, their boss, such as 68, slides d first along the non-inclined part 67 of the cam, then on the inclined part 66 thereof and, at the same time, the moving contact 42 (or 41) starts by moving backwards by sliding against the fixed track 11, then it comes off abruptly before completing its course and returning to its initial position shown in solid lines.
  • any other conventional characteristic desired can be incorporated into the device, such as, for example, the presence of a lamp 69, or electronic components such as resistors, diodes, transistors, etc. the latter advantageously being able to be soldered to the circuit before folding to allow wave welding.
  • the switch which has just been described is of the monostable type, but we could just as easily adopt similar provisions in bistable switches, incorporating suitable conventional means such as a heart cam mechanism for example.
  • FIG. 5 a second embodiment of the monostable switch according to the invention is shown. It differs essentially from that of FIGS. 1 to 4 by the fact that the movable contact elements, instead of being carried by the push button, are carried, like the fixed contact elements, also by the pre-established monobloc circuit; at the same time, the printed circuit has been replaced by a circuit cut from a sheet of an electrically conductive material, for example a bronze sheet.
  • the actuating members of the movable contact elements are directly carried by the push button, as in the previous embodiment.
  • the push button is also designated by 2 and the housing by 1 with its body 3 and its bottom 4.
  • the preset circuit is shown in isolation at 81 in FIG. 6; it is essentially composed of a sheet of metal suitably cut to form all the necessary electrical tracks; its central part 81A is also fixed on the insulating plate 4 which itself constitutes the bottom of the case, while its two lateral parts 81B, 81C, straightened against the internal face of two opposite walls of the body of the case, are also reinforced, respectively, by two insulating plates 31 and 32.
  • a track 84 with a fixed contact grain 85 which cooperates with a movable grain 86 (movable contact element) fixed on the distal end of a metal strip flexible 87 whose proximal end is itself fixed, by a rivet or a point solder 88 (or by clipping or crimping) on the end of a track 89.
  • Another track 91 carries a fixed contact grain 92 which cooperates with a movable grain (hidden in the drawings) fixed on another metal strip flexible 94 visible only in FIG. 6 and supported itself, like the lamella 87, by track 89.
  • the tracks 89, 91 and 84 are connected, respectively, to the connection plugs 25, 26 and 27.
  • the actuating member of each of the movable contact grains, for example, of the grain 85 is constituted by a cam 101 carried by the push-button 2 and adapted to push back a cleat 102 integral with the lamella 87 which carries said movable grain .
  • the push-button 2 occupies its out-of-rest position, which is that shown in FIG. 5, the movable grain 86 is separated from the fixed grain 85, which means that the plug 27 is electrically isolated from the file 25.
  • the strip 94 would establish contact with the track 91 due to the configuration of the corresponding actuation cam 104; the plug 26 would be electrically linked to the plugs 25 and 27.
  • the strip 87 would establish contact, while the strip 94 would cut the contact, so that the plug 26 would be cut electrically from both sheets 25 and 27 themselves then linked together.
  • This variant relates to a short-stroke type push-push switch in which the actuating members of the movable contacts are driven, not directly from the push-button, but by means of a mechanism.
  • motion transmission in this case, a mechanism of the known type with rotary cams.
  • a movable assembly composed of the following parts: the push button 122, an indicator light 123, a colored transparent plate 124, a spring 125, a leaf spring 126 and a finger drive 127.
  • the plate 124 and the indicator light 123 on which the initials of the button are marked are clipped into the latter.
  • the drive finger 127 slides axially in the button and its movement is controlled by the spring 125, while a transverse pretension is imparted to it by the leaf spring 126 planted in the push button.
  • the device comprises a sub-assembly composed of the elements referenced 137 to 149, namely: - an electrical circuit in copper 139, produced from a plane blank cut out and crimped onto a bottom 137, having one or two lateral supports 140 made of plastic material (in the example, the circuit comprises only one lateral support ). Blades or output plugs 138 are planted in the bottom 137 and crimped onto the circuit 139 so as to establish a permanent electrical junction there. On these output blades, will be plugged in a connector forming part, for example, of a vehicle wiring harness.
  • the camshaft 146 is driven in rotation by the finger 127 which cooperates with a ratchet wheel 146B secured to the camshaft 146.
  • a return cage 141 which is clipped onto the push button 122 and which therefore undergoes the same displacements than the latter.
  • This return cage has a lug 151 which ensures the locking of the camshaft 146 in each of its angular positions, by its engagement between two successive teeth of a locking wheel 152 secured to the camshaft.
  • a leaf spring 147 planted in the bottom 137 and coming to bear tangentially, under a initial tension, against the locking wheel, allows the camshaft to complete its pivoting towards the next stable state (or possibly previous) in case the pulse given by the user on the push button would be insufficient in pressure and / or in amplitude.
  • a sub-assembly composed of two parts 148, 149 ensures the lighting of the push-button, these are: a lamp 148 mounted in a translucent cover 149 clipped onto a lateral support 140; the arrangement of the lamp wires is such that once this operation has been carried out, each wire comes into contact with a track on the circuit 139.
  • Various components 143 can be mounted and soldered on circuit 139.
  • the sub-assembly 134 to 149 having been previously prepared with its circuit 139 completely flat and all the elements already mounted on it, the said circuit is then folded back, that is to say that raises its lateral part perpendicular to its central part and the entire circuit is introduced into the housing 121 which is then clipped onto the bottom 137; finally, the mobile assembly 122 to 127 is introduced into the housing 151 by the end of the latter which remains free, and is clipped there.
  • the circuit has a central part located in the bottom of the housing and a single lateral part rising against the internal face of the left wall (in FIG. 7) of the housing, but it could very well also include a second side portion which would rise against the internal face of the right wall of the housing, the switching mechanism then being completed accordingly.
  • This switch is a bistable switch, in which the second switching position (depressed position of the push button 2) is maintained, in a conventional manner, by a heart-shaped cam 156, integral with the push button 2, this cam cooperating with a finger. 158 extending a movable rod 160 carried by the housing 1.
  • Movable contacts such as 51 are integral with a push button.
  • the fixed contacts are part of an electrical circuit 19 cut flat and then folded, substantially at right angles to form the bottom part 19A and the side part 19B.
  • the circuit 19A is not only cut and folded, but also stamped, as shown in 162 to form two series of fixed, electrically separated contacts, such as 11-12.
  • the movable contact elements 41 of the movable contact blades 51 bear against the parts 12 of the fixed contacts.
  • contact is established with the parts 11 of the fixed contacts.
  • cam-shaped profile of the stamped portion 162 produces, in cooperation with the terminal portion 41 of the movable contact in effect of snap and abrupt rupture during the displacement of the movable contact.

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  • Push-Button Switches (AREA)
EP86402940A 1985-12-30 1986-12-26 Elektrischer Tastschalter Withdrawn EP0232656A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8519384A FR2592522B1 (fr) 1985-12-30 1985-12-30 Commutateur electrique a bouton-poussoir
FR8519384 1985-12-30

Publications (1)

Publication Number Publication Date
EP0232656A1 true EP0232656A1 (de) 1987-08-19

Family

ID=9326292

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86402940A Withdrawn EP0232656A1 (de) 1985-12-30 1986-12-26 Elektrischer Tastschalter

Country Status (2)

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EP (1) EP0232656A1 (de)
FR (1) FR2592522B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3839404A1 (de) * 1988-11-22 1990-05-23 Bosch Siemens Hausgeraete Konstruktiver aufbau einer schutzeinrichtung zur sicherheitsabschaltung von mikrowellen-haushaltgeraeten

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8821103D0 (en) * 1988-09-08 1988-10-05 Lucas Ind Plc Electrical circuit element

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0000906A1 (de) * 1977-08-30 1979-03-07 Siemens Aktiengesellschaft Adapter für ein elektrisches Bauelement
EP0080029A1 (de) * 1981-11-19 1983-06-01 Wolfgang Dipl.-Ing. Priesemuth Schaltkontaktanordnung und Verfahren zu ihrer Herstellung
GB2158646A (en) * 1984-04-11 1985-11-13 Lucas Ind Plc Rotary switch

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0000906A1 (de) * 1977-08-30 1979-03-07 Siemens Aktiengesellschaft Adapter für ein elektrisches Bauelement
EP0080029A1 (de) * 1981-11-19 1983-06-01 Wolfgang Dipl.-Ing. Priesemuth Schaltkontaktanordnung und Verfahren zu ihrer Herstellung
GB2158646A (en) * 1984-04-11 1985-11-13 Lucas Ind Plc Rotary switch

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3839404A1 (de) * 1988-11-22 1990-05-23 Bosch Siemens Hausgeraete Konstruktiver aufbau einer schutzeinrichtung zur sicherheitsabschaltung von mikrowellen-haushaltgeraeten

Also Published As

Publication number Publication date
FR2592522A1 (fr) 1987-07-03
FR2592522B1 (fr) 1991-01-18

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Inventor name: VIENNOIS, JEAN-PAUL