EP4064308B1 - Druckknopfschaltanordnung - Google Patents

Druckknopfschaltanordnung Download PDF

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Publication number
EP4064308B1
EP4064308B1 EP22159052.4A EP22159052A EP4064308B1 EP 4064308 B1 EP4064308 B1 EP 4064308B1 EP 22159052 A EP22159052 A EP 22159052A EP 4064308 B1 EP4064308 B1 EP 4064308B1
Authority
EP
European Patent Office
Prior art keywords
push button
actuation
switching assembly
tactile
tactile switch
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.)
Active
Application number
EP22159052.4A
Other languages
English (en)
French (fr)
Other versions
EP4064308A1 (de
Inventor
Babish THODIYIL
Praveenkumar Barad
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.)
Schneider Electric Industries SAS
Original Assignee
Schneider Electric Industries SAS
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Filing date
Publication date
Application filed by Schneider Electric Industries SAS filed Critical Schneider Electric Industries SAS
Publication of EP4064308A1 publication Critical patent/EP4064308A1/de
Application granted granted Critical
Publication of EP4064308B1 publication Critical patent/EP4064308B1/de
Active legal-status Critical Current
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Classifications

    • 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
    • H01H2221/00—Actuators
    • H01H2221/024—Transmission element
    • H01H2221/03—Stoppers for on or off position
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/66—Structural association with built-in electrical component
    • H01R13/70—Structural association with built-in electrical component with built-in switch
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R24/00—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure
    • H01R24/76—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure with sockets, clips or analogous contacts and secured to apparatus or structure, e.g. to a wall
    • H01R24/78—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure with sockets, clips or analogous contacts and secured to apparatus or structure, e.g. to a wall with additional earth or shield contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R25/00—Coupling parts adapted for simultaneous co-operation with two or more identical counterparts, e.g. for distributing energy to two or more circuits
    • H01R25/006—Coupling parts adapted for simultaneous co-operation with two or more identical counterparts, e.g. for distributing energy to two or more circuits the coupling part being secured to apparatus or structure, e.g. duplex wall receptacle

Definitions

  • the present invention generally relates to push button switching assembly for electrical apparatus. More particularly this invention relates to system and method of easy actuation of tactile switches by regulating stroke length of the push button switching assembly.
  • the invention finds its application in the field of the switching and actuation functionality of various electric apparatus mounted in various wall regulations.
  • electrical switches are mounted within a cut out of wall.
  • a structural part such as fixing member mounted on the electrical wall box.
  • the switching mechanism of the switch is protected from outside with a front cover.
  • the front cover in general consists of actuation button.
  • the electric push button thus can be actuated by applying force to actuation button such as push button or rocker which compresses tactile switches on the inserts such as printed circuit board (PCB).
  • PCB printed circuit board
  • a push button switching assembly is for instance known from document US 9 653 227 B2 .
  • tactile switches are actuated by applying force to the outer actuation button, which in turns transmits the force to the tactile switch which then actuates the circuit of the PCB to turn on the electrical apparatus. Since certain stroke length of actuation member is used inside the switching assembly, certain types of tactile switches require certain amount of compression force to get actuated, and can easily get damaged if excess force is applied. On the other hand, due of lack of adequate actuation force, the tactile switch may not get actuated at all. In some scenarios, the force applied on outer actuation button transmits to the tactile switch via intermediate members of the switching assembly which causes loss in applied actuation force and results in imperfect switching.
  • This invention also addresses the problem associated to over-pressing of tactile switches when actuation force of large magnitude is applied. Due to over-pressing of these types on the outer actuation switch, the tactile switches are damaged and any lever arm pressing the tactile switch also gets damaged, which results into improper switching action. Further, the existing lever arms devised in the push button switches are conventional cantilever flex arm having stress concentration at hinge point. These existing arts have high chance of crack /breakages over thousands of operations thus fails to provide any reliable switching mechanism.
  • the present invention proposes to provide a solution to the existing difficulties in said field of invention and provides proper actuation of tactile switches at various installation conditions, variation of wall regulation for example.
  • the present invention proposes a push button switching assembly for easy installation and proper tactile switch functioning.
  • the electric push button assembly is capable of providing good aesthetic appearance on the electrical outlet assembly without causing any dissatisfaction to the users. Due to the in-built features of the actuation member of the push button switching assembly, present invention is inexpensive, dependable and fully effective in accomplishing its intended purposes.
  • the push button switching assembly for actuation of tactile switches in electrical apparatus.
  • the push button switching assembly comprises
  • said actuation member comprises:
  • said terminal portion of said lever arm is provided with a dip concurrent to said tactile switch.
  • an elastic restoring member is disposed around said push button providing a push back force which brings said push button to its initial position for next operation.
  • said elastic restoring member is a coil spring.
  • said tactile switch is associated with a Printed Circuit Board (PCB).
  • PCB Printed Circuit Board
  • said lever arm extends in an inclined manner to bring the dip of said lever arm in-line with the tactile switch actuating direction.
  • said push button is snap fitted with said front cover with poka-yoke locking feature.
  • said lever arm is configured to provide biasing force to said push button for aligning with said front cover after the push button is released.
  • the terminal portion of said lever arm is provided with a U-shaped downward projection to receive said push button.
  • the invented push button switching assembly (100) comprises a base frame (102), a tactile switch (104), an actuation member (106), a front cover (108) and a push button (110) to be assembled together.
  • the assembly is mounted on a wall (124).
  • the wall surface may have wallpapers, or negative wall regulation conditions which are illustrated in figures 8 to 13 .
  • Figure 1 depicts the cross-sectional push button switching assembly (100) in an assembled configuration.
  • the push button (110) is inserted through a receiving hole of the front cover (108) and gets attached to it with snap-fit locking.
  • the rear part of the push button (110) rest on a terminal portion (114) of the lever arm (112) of the actuation member (106). More specifically, the terminal portion (114) is provided with a U-shaped downward projection (128) for receiving said push button (110).
  • lever arm (112) of the actuation member (106) When the push button (110) is pressed in a downward direction it urges the lever arm (112) of the actuation member (106) to transmit the actuation force to the tactile switch (104).
  • the remaining portion of the lever arm (112) is configured in an inclined manner with the horizontal level.
  • plurality of vertical zigzags and/or curvatures are provided along the path of inclination. Due to this inclined design configuration, when external stroke is applied on the push button (110), the force is transmitted to the lever arm (112) and the angle of movement of the flexible lever arm (112) is along the direction of the stroke.
  • the terminal portion (114) tilt downwards in a resilient manner. In this position the lever arm (112) maintains a push back force on the push button (110) in an upwards direction. Once the external force is removed, the lever arm (112) attains its primary position urging the push button (110) to move upwards for the next actuation operation.
  • a dip (118) is provided below the U-shaped projection (128) at the terminal portion (114) of the lever arm (112.
  • the dip (118) matches with the profile of the tactile switch (104). Since the angle of movement of the flexible lever arm (112) is along the direction of the stroke, the dip (118) concurrently falls top of said tactile switch (104).
  • the tactile switch (104) is mounted on a Printed Circuit Board (PCB) (122) or an integral part of the PCB (122).
  • the base frame (102) defines a housing in which the tactile switch (104) along with the PCB (122) is mounted in a removable manner.
  • the base frame (102) is provided with plurality of cut-outs for fixing the frame and thereby the entire assembly onto the wall (124) by fixing mechanism such as nailing, gluing etc.
  • an elastic restoring member preferably a coil spring (120) is disposed around said push button (110).
  • the axis of the coil spring coincides with the axis of the push button (110).
  • the coil spring (120) provides restoring force opposite to the direction of the movement.
  • the push button (110) attains its primary position on the he outer surface of the front cover (108) as depicted in figure 15 .
  • a stopper member (116) is provided at the terminal portion (114) of the lever arm (112).
  • the stopper member (116), in a preferred embodiment is a downward protruding pole member as depicted in the accompanying drawings.
  • the stopper member (116) limits the vertical movement of push button (110).
  • the positioning and protrusion length of the stopper member (116) can be varied according the configuration of the tactile switch (104) and base frame (102). Thus the risk of damaging the tactile switch (104) due to over-pressing is eliminated.
  • the insertion slot of the front cover (108) is provided with projection legs (132) extending in a downward direction.
  • the projection legs defines a lip opening for insertion of the rear of said push button (110) to be attached to the front cover (108) by snap-fitting.
  • the projection legs (132) can be compressible cantilever snaps.
  • the push button (110) is inserted to the opening defined by said lips of the projection legs (132). Once the rear end of the push button (110) is inserted and engaged within said lips, said push button (110) cannot be pulled out. Hence along with the push back force from said lever arm (112), a vertical gap (130) is defined ( Fig. 3 ) and eliminates the chances on falling off of the push button (110).
  • the front end of the push button (110) have circular disc profile with cylindrical body extending downwards.
  • the poka-yoke locking feature (126) is introduced conjunction with the snap-fitting of the push button (110) onto said front cover (108).
  • the push button (110) is completely inserted into the insertion slot of the front cover (108) and assembled together.
  • This feature in conjunction with the snap-fit lock ensures vertical movement of the push button (110) when external force is applied.
  • FIG. 8 depicts a normal intended condition of wall regulation.
  • the base frame (102) is fixed to the level on the wall (124) and the front cover (108) also rests on the level of the wall. There is no gap between the base frame (102) and front cover (108).
  • the lever arm (112) is constantly under contact with the push button (110) pressing towards upward direction.
  • Figure 10 depicts a second scenario of wall regulation, where front cover (108) is required to over travel past the base frame (102) to align onto the wall surface.
  • This scenario arises due to base frame (102) over projected out from installation wall (124).
  • this scenario could arise due to irregularities in the wall. Due to this irregularities impact on stroke length and thereby on switch actuation.
  • the lever arm (112) regulates positioning of the push button (110) with push back force and thereby reposition said push button (110) to maintain the stroke actuation.
  • This also enables the push button switching assembly (100) to maintain push button (110) alignment with the front cover (108).
  • Figure 12 of the accompanying drawings depicts a third scenario of wall regulation, where front cover (108) is required to remain above the base frame (102) to align onto the wall surface.
  • This scenario arises due to wall paper mounted on the installation wall (124).
  • this scenario could arise due to irregularities in the wall. Due to this irregularities impact on stroke length and thereby on switch actuation.
  • This under travel of front cover (108) which houses the push button (110) disturbs the stroke length and thereby switch actuation.
  • the lever arm (112) regulates positioning of the push button (110) with push back force and thereby reposition said push button (110) to maintain the stroke actuation.
  • This also enables the push button switching assembly (100) to maintain push button (110) alignment with the front cover (108).

Landscapes

  • Push-Button Switches (AREA)

Claims (9)

  1. Druckknopfschaltanordnung (100) für eine Betätigung von taktilen Schaltern (104) in einer elektrischen Vorrichtung, die Druckknopfschaltanordnung (100) umfassend:
    - einen Basisrahmen (102) zum Montieren der Druckknopfschaltanordnung (100) fixiert an eine Wand (124);
    - einen taktilen Schalter (104), der innerhalb des Basisrahmens (102) montiert ist,
    - ein Betätigungselement (106), das an dem taktilen Schalter (104) zum Herstellen und Trennen einer elektrischen Verbindung durch das Betätigen des taktilen Schalters (104) angeordnet ist,
    - eine vordere Abdeckung (108); und
    - einen Druckknopf (110), der sich durch die vordere Abdeckung (108) zum Übertragen von Betätigungskraft erstreckt, um das Betätigungselement (106) zu drängen, um den taktilen Schalter (104) zu betätigen und in die ursprüngliche Position zurückzuziehen, um eine Ebenheit mit der vorderen Abdeckung (108) unabhängig von Wandregulierungsbedingungen aufrechtzuerhalten, wobei das Betätigungselement (106) umfasst:
    - einen Hebelarm (112), der einen Endabschnitt (114) aufweist, der konfiguriert ist, um sich in einer Abwärtsrichtung zu dem taktilen Schalter (104) hin derart elastisch zu verformen, dass bei der Betätigung der Endabschnitt (114) die Kraft, die auf den Druckknopf (110) ausgeübt wird, auf den taktilen Schalter (104) überträgt; und
    dadurch gekennzeichnet, dass
    - ein Stopfenelement (116), das in einer Abwärtsrichtung derart vorsteht, dass, sobald der taktile Schalter (104) gedrückt wird, das Stopfenelement (116) eine weitere Bewegung des Druckknopfs (110) begrenzt.
  2. Druckknopfschaltanordnung (100) für die Betätigung von taktilen Schaltern (104) in einer elektrischen Vorrichtung nach Anspruch 1, wobei der Endabschnitt (114) des Hebelarms (112) mit einer Senkung (118) übereinstimmend mit dem taktilen Schalter (104) versehen ist.
  3. Druckknopfschaltanordnung (100) für die Betätigung von taktilen Schaltern (104) in einer elektrischen Vorrichtung nach Anspruch 1, wobei ein elastisches Rückstellelement (120) um den Druckknopf (110) herum angeordnet ist, das eine Rückstoßkraft bereitstellt, die den Druckknopf (110) für einen nächsten Betrieb in seine Ausgangsposition bringt.
  4. Druckknopfschaltanordnung (100) für die Betätigung von taktilen Schaltern (104) in einer elektrischen Vorrichtung nach Anspruch 3, wobei das elastische Rückstellelement eine Schraubenfeder (120) ist.
  5. Druckknopfschaltanordnung (100) für die Betätigung von taktilen Schaltern (104) in einer elektrischen Vorrichtung nach Anspruch 2, wobei der taktile Schalter (104) einer Leiterplatte (122) zugeordnet ist.
  6. Druckknopfschaltanordnung (100) für die Betätigung von taktilen Schaltern (104) in einer elektrischen Vorrichtung nach einem der Ansprüche 1 bis 5, wobei sich der Hebelarm (112) in geneigter Weise erstreckt, um die Senkung (118) des Hebelarms (112) in eine Linie mit der taktilen Schalterbetätigungsrichtung zu bringen.
  7. Druckknopfschaltanordnung (100) für die Betätigung von taktilen Schaltern (104) in einer elektrischen Vorrichtung nach einem der Ansprüche 1 bis 6, wobei der Druckknopf (110) mit der vorderen Abdeckung (108) mit einer Poka-Yoke-Verriegelungsfunktion (126) eingerastet ist.
  8. Druckknopfschaltanordnung (100) für die Betätigung von taktilen Schaltern (104) in einer elektrischen Vorrichtung nach einem der Ansprüche 1 bis 7, wobei der Hebelarm (112) konfiguriert ist, um eine Vorspannkraft an den Druckknopf (110) bereitzustellen, zum Ausrichten mit der vorderen Abdeckung (108), nachdem der Druckknopf (110) freigegeben ist.
  9. Druckknopfschaltanordnung (100) für die Betätigung von taktilen Schaltern (104) in einer elektrischen Vorrichtung nach einem der Ansprüche 1 bis 8, wobei der Endabschnitt (114) des Hebelarms (112) mit einem U-förmigen Abwärtsvorsprung (128) versehen ist, um den Druckknopf (110) aufzunehmen.
EP22159052.4A 2021-03-24 2022-02-28 Druckknopfschaltanordnung Active EP4064308B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IN202131012663 2021-03-24

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EP4064308A1 EP4064308A1 (de) 2022-09-28
EP4064308B1 true EP4064308B1 (de) 2023-10-25

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Country Status (2)

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EP (1) EP4064308B1 (de)
FI (1) FI4064308T3 (de)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1496640A (en) * 1976-10-12 1977-12-30 Pye Ltd Actuator for an electric switch
DE102011084464B4 (de) * 2011-10-13 2013-09-05 Dewert Antriebs- Und Systemtechnik Gmbh Mechanisch sperrbare Kabelfernbedienung
JP6634295B2 (ja) * 2016-01-18 2020-01-22 アルプスアルパイン株式会社 スイッチ装置
CN206742120U (zh) * 2017-05-23 2017-12-12 深圳市大疆创新科技有限公司 按键及电子装置
JP2020031001A (ja) * 2018-08-24 2020-02-27 京セラドキュメントソリューションズ株式会社 操作スイッチ装置、画像形成装置

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Publication number Publication date
EP4064308A1 (de) 2022-09-28
FI4064308T3 (fi) 2024-01-18

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