EP1294000A2 - An electrical double snap-action lamina switch - Google Patents
An electrical double snap-action lamina switch Download PDFInfo
- Publication number
- EP1294000A2 EP1294000A2 EP02019976A EP02019976A EP1294000A2 EP 1294000 A2 EP1294000 A2 EP 1294000A2 EP 02019976 A EP02019976 A EP 02019976A EP 02019976 A EP02019976 A EP 02019976A EP 1294000 A2 EP1294000 A2 EP 1294000A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- printed circuit
- lamina
- switch
- snap
- action
- 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.)
- Granted
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H23/00—Tumbler or rocker switches, i.e. switches characterised by being operated by rocking an operating member in the form of a rocker button
- H01H23/003—Tumbler or rocker switches, i.e. switches characterised by being operated by rocking an operating member in the form of a rocker button with more than one electrically distinguishable condition in one or both positions
-
- 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
- H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
- H01H1/24—Contacts characterised by the manner in which co-operating contacts engage by abutting with resilient mounting
- H01H1/26—Contacts characterised by the manner in which co-operating contacts engage by abutting with resilient mounting with spring blade support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
- H01H3/46—Driving mechanisms, i.e. for transmitting driving force to the contacts using rod or lever linkage, e.g. toggle
- H01H2003/466—Driving mechanisms, i.e. for transmitting driving force to the contacts using rod or lever linkage, e.g. toggle using a living hinge to connect the levers
-
- 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
- H01H21/18—Movable parts; Contacts mounted thereon
- H01H21/22—Operating parts, e.g. handle
- H01H2021/225—Operating parts, e.g. handle with push-pull operation, e.g. which can be pivoted in both directions by pushing or pulling on the same extremity of the operating member
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2215/00—Tactile feedback
- H01H2215/004—Collapsible dome or bubble
- H01H2215/006—Only mechanical function
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2221/00—Actuators
- H01H2221/008—Actuators other then push button
- H01H2221/018—Tumbler
Definitions
- the present invention relates to an electrical double snap-action switch, for example for controlling car-window regulators or else other facilities present on a motor vehicle.
- Embedded in pre-defined points within the silicone is electrically conductive material which enables closing of the contacts of the underlying printed circuit once the bubble has "snapped".
- the switch of the prior art has, however, constructional features that increase the costs for its manufacture, both on account of the larger number of assembly operations, and on account of delicate and hence costly machining operations.
- the contacts in the bubble are obtained from mixing carbon dusts with silicone or else are co-moulded with the silicone. In either cases, high-technology processes are involved.
- the purpose of the present invention is to provide a snap-action switch which will be inexpensive and will overcome the aforesaid drawback.
- a snap-action switch for controlling electrical devices of a motor vehicle, comprising a push-button and a container body in which there move at least two mobile contacts designed to perform a travel to reach either a first position of arrest with closing of a first part of fixed contacts of a printed circuit or a second position of arrest with closing of a second part of fixed contacts of said printed circuit, said mobile contacts being moved by an elastic-snap-action element made of silicone material on which there acts a pair of rigid bars, each of which is controlled by a prod that acts on them in a misaligned way, causing the snapping in succession of the part of the elastic snap-action element set underneath the ends of said bars, with consequent closing of said fixed contacts, the said switch being characterized in that said mobile contacts are made with a metal lamina set between the snap-action element consisting of silicone material and the printed circuit.
- number 1 designates as a whole the outer body of a switch, for example for controlling the motors of car-window regulators, formed by a cover or lid 2 and by a base 3 and provided with an oscillating control button 4 connected, in 5, to the lid 2.
- the body 1 is fixed in position by being snapped on to a part of the passenger compartment of a motor vehicle (not illustrated).
- the push-button 4 can move between two positions for controlling, in the example illustrated, closing or opening of the car windows.
- a lamina 10 Located on the base 3 of the body of the switch are the printed circuit 7 and the connectors 8 for its connection to the electrical system.
- a lamina 10 Anchored on the printed circuit, which is provided with special fixing pins, is a lamina 10.
- the lamina 10 is made of an elastic metal material, which is a conductor of electric current, and is made, starting from a plane metal strip, by means of a process of blanking and forming.
- the lamina 10 (see Figures 1 and 2), which has a substantially rectangular profile, presents, on the shorter sides, two arched strips per side, with at least one support 2 at the ends of each strip, and at least one central indentation 13 for each support.
- a second embodiment 10a of the lamina 10 is illustrated in Figure 3.
- the arched strips have been replaced by elastic bridges 12a, which are made at the four corners and perform the same function.
- Each indentation 13 is formed in a position such as to be located, when the switch is assembled, at a point corresponding to one of the silicone bubbles 14 made out of a single elastic element 15, referred to as "mat" in the specific terminology of the technical sector, set in a position overlying the lamina 10.
- the silicone bubbles have the function of providing the sensation of actuation of the switch.
- a second function of the silicone bubbles is to provide the compressive strength of the contact elements, in particular the contacts between the lamina 10 and the printed circuit 7, which is necessary for implementation of the electrical function of the switch.
- the points of contact of the lamina 10 on the printed circuit 7 consist of a pad having a substantially circular shape 15a, with a hole 16 passing through the printed circuit, made at its centre. Both the pads and the holes of each point of contact are coated with electrically conductive material.
- a pair of rigid bars 17 and 18, is set in a position overlying the mat, and each bar is supported on a pair of silicone bubbles on one and the same side of the mat so as to exert pressure on them as a result of the actuation of the oscillating control 4.
- the action of said control is transmitted to the rigid bars by means of a pair of prods 19 and 20, each associated to a single bar, in a point that is not equidistant from the points of application of the reactions of the silicone bubbles on the rigid bars, so that the linear motion of the prods pushed downwards (with respect to Figure 1) will be converted into a motion of rotation and translation of said rigid bars (see Figures 4a to 4c).
- the prods 19 and 20 are connected to the rigid bars 17 and 18 by hinges, which, in one of the possible embodiments, are represented by flexible elements in the form of S-shaped springs 22.
- the making of the electrical contact by means of the indentation 13 on the supports 12, enables, at the moment of "snapping" of the silicone bubble, mutual sliding of the surfaces of contact between the lamina and the printed circuit, i.e., a relative movement between the two parts, which enables a self-cleaning effect of the surfaces involved to be obtained, with consequent longer duration of efficient operation of the switch.
- the central through hole 16 moreover enables removal of any residual impurities that might result from the machining process or that may have been created during use from the surface of contact between the metal lamina and the printed circuit, the said contact being made on the edge and not on the flat surface.
Landscapes
- Push-Button Switches (AREA)
- Keying Circuit Devices (AREA)
- Relay Circuits (AREA)
- Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
Abstract
Description
- The present invention relates to an electrical double snap-action switch, for example for controlling car-window regulators or else other facilities present on a motor vehicle.
- Many of the currently available snap-action switches are made up of an actuating push-button, which also has an aesthetic function, fitted on a supporting body by means of a hinge connection, which enables relative movement of rocking. The rocking motion of the push-button is converted into linear motion of two prods, which act on a rigid bar, which in turn impinges upon a pair of snap-action elements, also referred to as bubbles, made of silicone rubber. The hinge connection between the prods and the rigid bar enables a motion of rotation and translation of the aforesaid bar. The said motion is governed by the collapse of the silicone bubbles, which occurs in succession as a consequence of the fact that the point of contact between the prod and the rigid bar is not equidistant from the points of application of the reactions of the bubbles on said bar.
- Embedded in pre-defined points within the silicone is electrically conductive material which enables closing of the contacts of the underlying printed circuit once the bubble has "snapped".
- The switch of the prior art has, however, constructional features that increase the costs for its manufacture, both on account of the larger number of assembly operations, and on account of delicate and hence costly machining operations. In greater detail, the contacts in the bubble are obtained from mixing carbon dusts with silicone or else are co-moulded with the silicone. In either cases, high-technology processes are involved.
- The purpose of the present invention is to provide a snap-action switch which will be inexpensive and will overcome the aforesaid drawback.
- The above and other purposes and advantages are achieved by a snap-action switch for controlling electrical devices of a motor vehicle, comprising a push-button and a container body in which there move at least two mobile contacts designed to perform a travel to reach either a first position of arrest with closing of a first part of fixed contacts of a printed circuit or a second position of arrest with closing of a second part of fixed contacts of said printed circuit, said mobile contacts being moved by an elastic-snap-action element made of silicone material on which there acts a pair of rigid bars, each of which is controlled by a prod that acts on them in a misaligned way, causing the snapping in succession of the part of the elastic snap-action element set underneath the ends of said bars, with consequent closing of said fixed contacts, the said switch being characterized in that said mobile contacts are made with a metal lamina set between the snap-action element consisting of silicone material and the printed circuit.
- There now follows a description of the structural and functional characteristics of a preferred but non-limiting embodiment of the switch according to the invention with reference to the attached drawings, in which:
- Figure 1 is an exploded side view of a switch according to the invention;
- Figures 2 and 3 are perspective views of two different embodiments of the lamina of the switch of the present invention;
- Figures 4a, 4b and 4c are partially cross-sectional views of the mechanism of the switch illustrated in Figure 1 in its three operating positions; and
- Figure 5 is an enlarged view of one of the points of contact between the lamina and the printed circuit of the switch according to the invention.
- With reference to the figures, number 1 designates as a whole the outer body of a switch, for example for controlling the motors of car-window regulators, formed by a cover or
lid 2 and by abase 3 and provided with anoscillating control button 4 connected, in 5, to thelid 2. The body 1 is fixed in position by being snapped on to a part of the passenger compartment of a motor vehicle (not illustrated). The push-button 4 can move between two positions for controlling, in the example illustrated, closing or opening of the car windows. - Located on the
base 3 of the body of the switch are the printedcircuit 7 and theconnectors 8 for its connection to the electrical system. Anchored on the printed circuit, which is provided with special fixing pins, is alamina 10. The latter is made of an elastic metal material, which is a conductor of electric current, and is made, starting from a plane metal strip, by means of a process of blanking and forming. The lamina 10 (see Figures 1 and 2), which has a substantially rectangular profile, presents, on the shorter sides, two arched strips per side, with at least onesupport 2 at the ends of each strip, and at least onecentral indentation 13 for each support. - A
second embodiment 10a of thelamina 10 is illustrated in Figure 3. In the latter embodiment, the arched strips have been replaced byelastic bridges 12a, which are made at the four corners and perform the same function. Eachindentation 13 is formed in a position such as to be located, when the switch is assembled, at a point corresponding to one of thesilicone bubbles 14 made out of a singleelastic element 15, referred to as "mat" in the specific terminology of the technical sector, set in a position overlying thelamina 10. The silicone bubbles have the function of providing the sensation of actuation of the switch. In particular, they follow a non-linear curve of the strength of the bubble versus the travel, the said curve rising up to the point where the bubble reaches an unstable geometrical condition, beyond which there occurs collapse with sudden reduction in the strength and consequent increase in the speed of motion of the system. In this way, the classic snap-action of the switch is obtained. A second function of the silicone bubbles is to provide the compressive strength of the contact elements, in particular the contacts between thelamina 10 and theprinted circuit 7, which is necessary for implementation of the electrical function of the switch. - At points corresponding to the
indentations 13, there are made the points of contact of thelamina 10 on the printedcircuit 7. They consist of a pad having a substantiallycircular shape 15a, with ahole 16 passing through the printed circuit, made at its centre. Both the pads and the holes of each point of contact are coated with electrically conductive material. - A pair of
rigid bars control 4. The action of said control is transmitted to the rigid bars by means of a pair ofprods - The
prods rigid bars - The switch according to the invention functions in the way described hereinafter, with particular reference to Figures 1 and 4a, 4b, 4c.
- When a pressure or a tensile stress is exerted on the push-
button 4, causing its rotation about thefulcrum 5, a pressure is, in any case, exerted on the central portion of one of the tworigid bars prods lamina 10 to rest on the printedcircuit 7 so closing the first control circuit. Proceeding in the action on the push-button, therigid bar lamina 10 to close the second control circuit on the printed circuit (Figure 4c). - The making of the electrical contact by means of the
indentation 13 on thesupports 12, enables, at the moment of "snapping" of the silicone bubble, mutual sliding of the surfaces of contact between the lamina and the printed circuit, i.e., a relative movement between the two parts, which enables a self-cleaning effect of the surfaces involved to be obtained, with consequent longer duration of efficient operation of the switch. The central throughhole 16 moreover enables removal of any residual impurities that might result from the machining process or that may have been created during use from the surface of contact between the metal lamina and the printed circuit, the said contact being made on the edge and not on the flat surface.
Claims (6)
- A double snap-action switch for controlling electrical apparatus of a motor vehicle, comprising a push-button (4) and a container body in which there move mobile contacts (12) designed to perform a travel to reach both a first position of arrest, with closing of a first part of fixed contacts of a printed circuit, and a second position of arrest, with closing of a second part of fixed contacts of said printed circuit, said mobile contacts being moved by an elastic snap-action element made of silicone material (15), on which there acts a pair of rigid bars (17, 18) each controlled by a prod (19, 20), which acts on them in a misaligned way, causing the snapping in succession of the part of the elastic snap-action element set underneath the ends of said bars (17, 18), with consequent closing of said fixed contacts, the said switch being characterized in that said mobile contacts (12) are made with a metal lamina (10) set between the snap-action element made of silicone material and the printed circuit.
- The switch according to Claim 1, characterized in that the metal lamina (10) has a substantially rectangular profile and has, on the shorter sides, two arched strips per side, with at least one support (12) at the ends of each strip and at least one central indentation (13) for each support.
- The switch according to Claims 1 and 2, characterized in that made on the printed circuit (7) are points of contact for the supports of the lamina (10), made up of a pad of a substantially circular shape (15a), with a through hole (16) in the printed circuit, made in its centre, at points corresponding to said indentations (13).
- The switch according to Claim 3, characterized in that the points of contact and the holes are coated with electrically conductive material.
- The switch according to Claims 1 to 3, characterized in that the contact between the lamina (10) and the printed circuit (7) is made on the edge of the holes (16).
- The switch according to Claim 1, characterized in that the supports of the metal lamina (10a) are elastic bridges (12a) made at a point corresponding to its corners.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITTO20010878 | 2001-09-14 | ||
IT2001TO000878A ITTO20010878A1 (en) | 2001-09-14 | 2001-09-14 | ELECTRIC DOUBLE TRIP SWITCH. |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1294000A2 true EP1294000A2 (en) | 2003-03-19 |
EP1294000A3 EP1294000A3 (en) | 2005-02-09 |
EP1294000B1 EP1294000B1 (en) | 2014-04-16 |
Family
ID=11459193
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02019976.6A Expired - Lifetime EP1294000B1 (en) | 2001-09-14 | 2002-09-05 | An electrical double snap-action lamina switch |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1294000B1 (en) |
BR (1) | BRPI0203967B1 (en) |
IT (1) | ITTO20010878A1 (en) |
MX (1) | MXPA02008948A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1513175A3 (en) * | 2003-09-05 | 2007-04-11 | TRW Automotive Electronics & Components GmbH & Co. KG | Tumbler switch and manufacturing method for tumbler switch with two positions |
CN105931914A (en) * | 2016-06-30 | 2016-09-07 | 昌辉汽车电器(黄山)股份公司 | Switch structure for car steering wheel |
EP4297057A1 (en) * | 2022-06-22 | 2023-12-27 | Dav | Co-directional dual actuation toggle controller with dual detent haptic feedback |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3916135A (en) * | 1974-07-03 | 1975-10-28 | Hewlett Packard Co | Keyboard type switch with rocker type key actuator |
US4193181A (en) * | 1976-12-06 | 1980-03-18 | Texas Instruments Incorporated | Method for mounting electrically conductive wires to a substrate |
US5719361A (en) * | 1996-08-09 | 1998-02-17 | Packard Hughes Interconnect Company | Mechanism for multiple dome dual detent |
JP3526775B2 (en) * | 1999-03-11 | 2004-05-17 | アルプス電気株式会社 | Push switch |
-
2001
- 2001-09-14 IT IT2001TO000878A patent/ITTO20010878A1/en unknown
-
2002
- 2002-09-05 EP EP02019976.6A patent/EP1294000B1/en not_active Expired - Lifetime
- 2002-09-12 MX MXPA02008948A patent/MXPA02008948A/en active IP Right Grant
- 2002-09-13 BR BRPI0203967A patent/BRPI0203967B1/en not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
None |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1513175A3 (en) * | 2003-09-05 | 2007-04-11 | TRW Automotive Electronics & Components GmbH & Co. KG | Tumbler switch and manufacturing method for tumbler switch with two positions |
CN105931914A (en) * | 2016-06-30 | 2016-09-07 | 昌辉汽车电器(黄山)股份公司 | Switch structure for car steering wheel |
CN105931914B (en) * | 2016-06-30 | 2019-01-18 | 昌辉汽车电器(黄山)股份公司 | A kind of construction of switch for vehicle steering wheel |
EP4297057A1 (en) * | 2022-06-22 | 2023-12-27 | Dav | Co-directional dual actuation toggle controller with dual detent haptic feedback |
FR3137207A1 (en) * | 2022-06-22 | 2023-12-29 | Dav | Dual-actuation, single-direction rocker control with dual-trigger haptic feedback |
Also Published As
Publication number | Publication date |
---|---|
ITTO20010878A1 (en) | 2003-03-14 |
BRPI0203967B1 (en) | 2016-10-25 |
ITTO20010878A0 (en) | 2001-09-14 |
EP1294000B1 (en) | 2014-04-16 |
BR0203967A (en) | 2003-05-20 |
EP1294000A3 (en) | 2005-02-09 |
MXPA02008948A (en) | 2004-08-19 |
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