EP1662523A1 - Drucktaster - Google Patents

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Publication number
EP1662523A1
EP1662523A1 EP04425896A EP04425896A EP1662523A1 EP 1662523 A1 EP1662523 A1 EP 1662523A1 EP 04425896 A EP04425896 A EP 04425896A EP 04425896 A EP04425896 A EP 04425896A EP 1662523 A1 EP1662523 A1 EP 1662523A1
Authority
EP
European Patent Office
Prior art keywords
contact
electric
movable contact
switch
conductive element
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Withdrawn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
EP04425896A
Other languages
English (en)
French (fr)
Inventor
Antonio Coppola
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.)
Signal Lux MDS Srl
Original Assignee
Signal Lux MDS Srl
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 Signal Lux MDS Srl filed Critical Signal Lux MDS Srl
Priority to EP04425896A priority Critical patent/EP1662523A1/de
Publication of EP1662523A1 publication Critical patent/EP1662523A1/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Withdrawn legal-status Critical Current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
    • H01H1/14—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
    • H01H1/242—Contacts characterised by the manner in which co-operating contacts engage by abutting with resilient mounting the contact forming a part of a coil spring
    • 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
    • H01H13/52—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 immediately upon removal of operating force, e.g. bell-push switch
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
    • 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
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/0066—Auxiliary contact devices

Definitions

  • the present invention relates to a push button switch of the type comprising the features set out in the preamble of claim 1.
  • the present invention falls within the field of change-over switches, the function of which is to change connections between two or more electric circuits.
  • the switch of the present invention is adapted to be mounted on household appliances, such as coffee-making machines, to control, by way of example and in a manner known by itself, the heating circuit for steam production and the on-off valve for steam cut-off.
  • a change-over switch of the push button type comprises a box-shaped holding body having an opening close to which a control push button is housed which is movable between at least two operating positions.
  • the push button is operatively connected with a movable contact carrier disposed at the inside of the box-shaped body that, upon operation of the push button, is able to move between two operating positions corresponding to closure of either of the two circuits.
  • the contact carrier is defined by a plate connected to the push button so as to carry out translation between a first and a second positions. In the first position, each of the opposite ends of the plate comes into contact with a respective terminal belonging to a first pair of terminals connected to the first circuit. In the second position, each of the opposite ends of the plate comes into contact with a respective terminal belonging to a second pair of terminals connected to the second circuit.
  • Switch 1 comprises a box-shaped element, known by itself and therefore not shown or described, which is provided with an opening for housing a command key 2 movable between at least two operating positions.
  • the key is of the type known as "push button", i.e. it carries out a translation without tilting or rocking, and is able to control, by means of a contact carrier 3a defined by a body of plastic material shown in Fig. 1, a set of contacts 3.
  • the contact set 3 acts on at least three electric terminals 4 projecting from the box-shaped element and suitable for connection with at least two electric circuits.
  • the contact set 3 further comprises a conductive element 8 provided with a first end 8a in engagement with one of the electric terminals 4.
  • the conductive element 8 rests on and is joined preferably by electric welding to the surface 7 of the contact board 6 of the respective terminal 4.
  • the conductive element 8 extends away from the contact board 6 of the respective terminal 4, until it partly overlaps a first movable contact 9.
  • the conductive element 8 is defined by a wire 10 of a conductive material, which is advantageously elastic and preferably consists of a metal material, copper or iron-based alloys for example, at least partly wound up like a helical spring 11.
  • a second end 8b of the conductive element 8 extends away from the helical spring 11, to overlap the first movable contact 9.
  • the cross section of wire 10, that is selected based on the current intensity designed to pass through the conductive element 8, preferably has a diameter included between 0.2 mm and 1.5 mm.
  • the first movable contact 9 has a first end 9a thereof permanently in electric contact with one of the electric terminals 4.
  • the first end 9a of the first movable contact 9 is shaped into a convex surface resting in a seat 12 conforming in shape to said surface and defined by the contact surface 7 of the contact board 6.
  • This solution enables the first movable contact 9, upon the action of the command key 2, to rotate on the electric terminal 4 with which it is permanently in engagement, for displacement between a first and a second operating positions.
  • a second end 9b of the first movable contact 9 opposite to the first end 9a lies in contact with the second end 8b of the conductive element 8 to close one of the two circuits.
  • the second end 9b of the first movable contact 9 is moved apart from the conductive element 8.
  • the switch 1 comprises a first electric terminal 4a permanently in electric contact with the first movable contact 9, a second electric terminal 4b carrying the conductive element 8 and a third electric terminal 4c lying in side by side relationship with the second terminal 4b.
  • the second end 8b of the conductive element 8 extends until over the contact board 6 of the third electric terminal 4c.
  • the second end 8b of the conductive element 8 has a first rectilinear stretch 13 perpendicular to the contact board 6 and connected to a second rectilinear stretch 14 parallel to said contact board 6 and oriented towards the third electric terminal 4c.
  • a third rectilinear stretch 15 of the conductive element 8 extends from the second stretch 14 and is oriented towards the first electric terminal 9.
  • the third rectilinear stretch 15 of the conductive element 8 is inclined relative to the contact board 6 so that it appears to be parallel to the first movable contact 9 when the latter is in the first operating position.
  • the second end 8b of the conductive element 8 and second end 9b of the first movable contact 9 therefore delimit a mutual-coupling surface enabling passage of current at an intensity as high as 16 amp.
  • the switch further comprises a plate 16 positioned on the second end 9b of the first movable contact 9 and set to come into contact with the second end 8b of the conductive element 8.
  • a small disk 17 Located on the second end 9b of the first movable contact 9, on the opposite side from plate 16, is a small disk 17 that when the first movable contact 9 is in the second position comes into contact with a small disk 18 located on the contact board 6 of the third terminal 4c.
  • the switch 1 further comprises a fourth electric terminal 4d and a signal light 19 permanently in electric contact with the fourth electric terminal 4d and the first movable contact 9. Connection between the fourth electric terminal 4d is obtained through a second movable contact 20 having a first end 20a permanently in contact with the fourth electric terminal 4c.
  • the second movable contact 20 is movable, upon operation of the command key 2, together with the first movable contact 9.
  • the first end 20a of the second movable contact 20 is shaped like a convex surface resting in a seat 12 conforming in shape to said surface and defined in the contact board 6 of the fourth terminal 4d. Power supply to the signal light 19 is ensured by deformable spring elements 21, of a type known by itself, connecting the signal light 19 to the first and second movable contacts 9, 20.
  • the switch 1 comprises a first electric terminal 4a permanently in electric contact with the first movable contact 9, a second electric terminal 4b carrying the conductive element 8, a third electric terminal 4c, permanently in electric contact with a second movable contact 20, and a fourth electric terminal 4d.
  • Each of the first ends 9a, 20a of both the first and second movable contacts 9, 20 is shaped as previously described as regards the first embodiment (Figs. 1, 2 and 3). Both the movable contacts 9, 20 rotate together, upon operation of the command key 2, on the respective electric terminals 4a; 4c, for movement between the first and second operating positions.
  • the first movable contact 9 extends towards the second electric terminal 4b.
  • the second end 8b of the conductive element 8 is defined by a single rectilinear stretch 22 substantially parallel to the contact boards 6 and extending towards the first electric terminal 4a.
  • the first movable contact 9 is movable between the first operating position, at which its second end 9b lies in contact with the second end 8b of the conductive element 8, and the second operating position at which its second end 9b is moved away from the second end 8b of the conductive element 8.
  • the second movable contact 20 extends towards the fourth electric terminal 4d and its second end 20b lies in superposed relationship with the contact board 6 of said fourth electric terminal 4d.
  • the second movable contact 20 is movable between the first operating position at which its second end 20b is moved apart from the fourth electric terminal 4d, and the second operating position at which its second end 20b lies in contact with the fourth electric terminal 4d.
  • the conductive element 8 and the first movable contact 9 enable passage of current between the first 4a and second 4b electric terminals.
  • the second movable contact 20 enables passage of current between the third 4c and fourth 4d electric terminals.
  • switch 1 further comprises a signal light 19 permanently in electric contact with the first and the second movable contacts 9, 20. Power supply to the signal light 19 is ensured by the same deformable spring elements 21 as used for the variant of the first embodiment (Fig. 3).
  • the present invention achieves the intended purposed and offers important advantages.
  • the switch in accordance with the present invention enables a reduction in sizes as compared with the change-over switches of known type and therefore it can be mounted more easily on the household appliances with which it is associated.
  • the particular construction solution of the switch in accordance with the present invention allows a reduced cost of the different components and an easy assembly.
  • the conductive element in the form of a cylindrical spring can be easily found as a standard component, to a low cost, which enables the final cost of the switch to be reduced.
  • the elasticity of said conductive element further ensures the electric contact with the terminals, even in the presence of vibrations when the appliance on which it is mounted is being operated.
  • the conductive element can be easily chosen and/or sized, based on the current intensity that the switch must handle.

Landscapes

  • Push-Button Switches (AREA)
EP04425896A 2004-11-26 2004-11-26 Drucktaster Withdrawn EP1662523A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP04425896A EP1662523A1 (de) 2004-11-26 2004-11-26 Drucktaster

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04425896A EP1662523A1 (de) 2004-11-26 2004-11-26 Drucktaster

Publications (1)

Publication Number Publication Date
EP1662523A1 true EP1662523A1 (de) 2006-05-31

Family

ID=34932920

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04425896A Withdrawn EP1662523A1 (de) 2004-11-26 2004-11-26 Drucktaster

Country Status (1)

Country Link
EP (1) EP1662523A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103829805A (zh) * 2012-11-28 2014-06-04 苏州工业园区咖乐美电器有限公司 一种用于咖啡机的电源开关结构
CN108110198A (zh) * 2017-12-18 2018-06-01 浙江动新能源动力科技股份有限公司 一种带开关机构组合式电池包插片装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4092503A (en) * 1975-12-22 1978-05-30 Johan Nils Eskil Raeder Push button switch or keyboard assembly having flexible wire contacts
EP0747915A1 (de) * 1995-06-06 1996-12-11 SIGNAL LUX S.p.A. Sicherheitsschalter, insbesondere für elektrische Haushaltsgeräte
EP1363301A1 (de) * 2002-05-14 2003-11-19 Alps Electric Co., Ltd. Schalter für Stromversorgung mit Erkennungsschalter
EP1453071A1 (de) * 2003-02-28 2004-09-01 Signal Lux MDS S.r.l. Sicherheitsschalter

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4092503A (en) * 1975-12-22 1978-05-30 Johan Nils Eskil Raeder Push button switch or keyboard assembly having flexible wire contacts
EP0747915A1 (de) * 1995-06-06 1996-12-11 SIGNAL LUX S.p.A. Sicherheitsschalter, insbesondere für elektrische Haushaltsgeräte
EP1363301A1 (de) * 2002-05-14 2003-11-19 Alps Electric Co., Ltd. Schalter für Stromversorgung mit Erkennungsschalter
EP1453071A1 (de) * 2003-02-28 2004-09-01 Signal Lux MDS S.r.l. Sicherheitsschalter

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103829805A (zh) * 2012-11-28 2014-06-04 苏州工业园区咖乐美电器有限公司 一种用于咖啡机的电源开关结构
CN108110198A (zh) * 2017-12-18 2018-06-01 浙江动新能源动力科技股份有限公司 一种带开关机构组合式电池包插片装置
US20200373713A1 (en) * 2017-12-18 2020-11-26 Zhejiang Lera New Energy Power Technology Co., Ltd Combined-type battery pack tab device with switch unit

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