EP0585536B1 - An anti-vandal hermetically sealed push-button panel - Google Patents
An anti-vandal hermetically sealed push-button panel Download PDFInfo
- Publication number
- EP0585536B1 EP0585536B1 EP19930108328 EP93108328A EP0585536B1 EP 0585536 B1 EP0585536 B1 EP 0585536B1 EP 19930108328 EP19930108328 EP 19930108328 EP 93108328 A EP93108328 A EP 93108328A EP 0585536 B1 EP0585536 B1 EP 0585536B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- push
- button
- bodies
- panel
- panel according
- 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.)
- Expired - Lifetime
Links
- 239000012528 membrane Substances 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 5
- 239000004677 Nylon Substances 0.000 claims description 4
- 229920001778 nylon Polymers 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims 1
- 239000000428 dust Substances 0.000 description 3
- 230000008595 infiltration Effects 0.000 description 3
- 238000001764 infiltration Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 238000003486 chemical etching Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920001195 polyisoprene Polymers 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Images
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
- H01H13/02—Details
- H01H13/04—Cases; Covers
- H01H13/06—Dustproof, splashproof, drip-proof, waterproof or flameproof casings
-
- 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
- H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2219/00—Legends
- H01H2219/036—Light emitting elements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2223/00—Casings
- H01H2223/002—Casings sealed
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2239/00—Miscellaneous
- H01H2239/038—Anti-vandalism
Definitions
- the present invention relates to an anti-vandal hermetically sealed push-button panel, particularly suitable for application on public equipments such as vending machines, ticket and bank note distributors, telephones, lifts, hoists, and generally all equipments requiring push-button panels with particular mechanical resistance features.
- push-button panels of the aforementioned equipments are likely to suffer from damages by blunt instruments, fire and corrosive substances. Other damage may derive from penetration of liquid and dust in the interstices between the push-buttons and the panel's escutcheon plate.
- push-button panels are commonly made of plastic material, so they are rather vulnerable with respect to the above cited damages. In certain cases panels have push-buttons that are raised or anyway offer several points where they can be damaged by keys or blades.
- GB-A-2046524 discloses an anti-vandal hermetically sealed push-button panel, comprising a plurality of push-buttons for actuating corresponding actuators of a printed circuit.
- the push-buttons are divided in two separate bodies, an outer body and an inner body operationally facing one of said actuators.
- the outer push-button bodies are assembled within a superficial metallic escutcheon plate substantially level with the uppermost surfaces of the push-buttons.
- a resilient sealing membrane is pressed between the two bodies and integral therewith.
- a backing plate is provided to compress the membrane.
- Another object of the invention is to provide a panel in which a heating optional system may be fitted for panels bound to be installed in zones where the winter climate is rigorous.
- a preferred but not-limiting embodiment of the panel according to the present invention is described hereinafter with reference to the accompanying drawing, that is a cross section of the panel, in which only one push-button is illustrated for simplicity.
- an anti-vandal hermetically sealed push-button panel according to the invention is shown, wherein the scale has been intentionally altered for facilitating the description. Moreover, it is intended that the panel according to the invention comprises a plurality of push-buttons that are identical to the one that is shown and distributed systematically.
- Each push-button that is indicated as a whole by numeral 10, is divided in two separate bodies, an upper or outer body 10a and an inferior or inner body 10b. Both bodies are preferably obtained out of nylon or other pressed material.
- the efficiency of the mechanical assembly is attained by means of special gain joint 15a and 15b respectively obtained in the faces 13a and 13b that contact the mambrane 12.
- Hermetic seal is provided through ultrasonic sealing.
- the function of the membrane 12 is that of guaranteeing watertight seal with respect to possible infiltration of water, dust or other pulluting agents which could penetrate in the intersticies 14 between the bodies 10a of adjacent push-buttons.
- the panel comprises a superficial metallic escutcheon plate 16, preferably made of steel or pressure casted and painted alluminium, that surrounds externally the plurality of push-button bodies 10a.
- the escutcheon plate 16 is inserted within a corresponding opening or seat 17 obtained in a panel 19 being integral with the outer casing of the equipment on which the panel of this invention is fitted.
- a heating flat resistor 20 can be inserted between the escutcheon plate 16 and the membrane 12 so as to prevent ice from forming near the bush-button bodies 10a and therefore blocking them and render the whole panel inactive.
- the outer push-button body 10a and the inner one 10b are both advantageously made of nylon or other pressed material. Moreover, a push-button cover plate 21 is fixed on top of each one of the outer bodies 10a.
- the plates 21 covering the upper surface of the push-buttons and copying the shape thereof are preferably made of stainless steel and have a symbol (number, letter or special symbol) obtained by chemical etching on their upper side.
- the layer 22 is suitably perforated and shaped so as to contain the inner push-button bodies 10b and form supporting seats 23 for the inferior bases 10c thereof.
- the layer 22 forms an inferior rectangular hollow 24 surrounding and partially containing a printed circuit 25.
- the latter comprises a plurality of upper steel convex portions 26, each one located proximate to a push-button 10b and working as actuators for the push-buttons.
- These actuators, of the type normally used for tactile effect push-buttons are not described herinafter as being well known to a person skilled in the art.
- a peripheral groove 27 is obtained on the upper edge of the layer 22 for containing a peripheral gasket 29, preferably made of rubber or other suitable material.
- the gasket 29 is pressed between the layer 22 and the outer panel 19, surrounding the membrane 12 and sealing the push-button panel.
- the printed circuit 25 and the actuators 26 can be superiorly covered by at least one insulating layer 30 of polyester with emi/RFI shielding.
- the push-buttons 10 may have inner lights 31 for lightening the symbols from underneath. This possibility can also be used for lightening a single push-button to indicate that it has been selected.
- the push-button panel according to this invention appears with an outer flat surface, completely metallic and with no considerable asperity or possible hooking points. Besides having the required mechanical resistance, the panel guarantees a good hermetic sealing for the inner parts, avoiding water infiltration and encrustations forming due to dust or mud.
- the outer surface can resist common cleansing products and is easily washable being substantially smooth.
Landscapes
- Push-Button Switches (AREA)
- Input From Keyboards Or The Like (AREA)
- Elevator Control (AREA)
Description
- The present invention relates to an anti-vandal hermetically sealed push-button panel, particularly suitable for application on public equipments such as vending machines, ticket and bank note distributors, telephones, lifts, hoists, and generally all equipments requiring push-button panels with particular mechanical resistance features.
- As known, push-button panels of the aforementioned equipments, and particularly those ones installed in hostile environments, are likely to suffer from damages by blunt instruments, fire and corrosive substances. Other damage may derive from penetration of liquid and dust in the interstices between the push-buttons and the panel's escutcheon plate.
- Some kinds of actual push-button panels are commonly made of plastic material, so they are rather vulnerable with respect to the above cited damages. In certain cases panels have push-buttons that are raised or anyway offer several points where they can be damaged by keys or blades.
- GB-A-2046524 discloses an anti-vandal hermetically sealed push-button panel, comprising a plurality of push-buttons for actuating corresponding actuators of a printed circuit. The push-buttons are divided in two separate bodies, an outer body and an inner body operationally facing one of said actuators. The outer push-button bodies are assembled within a superficial metallic escutcheon plate substantially level with the uppermost surfaces of the push-buttons. A resilient sealing membrane is pressed between the two bodies and integral therewith.
- A backing plate is provided to compress the membrane.
- It is an object of this invention to provide a hermetically sealed push-button panel capable of overcoming the above inconveniences.
- It is another object of this invention to provide a push-button panel having no considerable external asperity, in which accessible parts are difficult to be removed and offer high resistance to blunt instrument strikes.
- It is a further object of this invention to provide a push-button panel hermetically sealed with respect to infiltration of water and particles that may adversely affect correct operation of the panel.
- Another object of the invention is to provide a panel in which a heating optional system may be fitted for panels bound to be installed in zones where the winter climate is rigorous.
- The above and further objects and advantages, which will be more apparent hereinafter, are attained according to the present invention by an anti-vandal hermetically sealed push-button panel as claimed in claim 1.
- A preferred but not-limiting embodiment of the panel according to the present invention is described hereinafter with reference to the accompanying drawing, that is a cross section of the panel, in which only one push-button is illustrated for simplicity.
- Referring to the drawing, an anti-vandal hermetically sealed push-button panel according to the invention is shown, wherein the scale has been intentionally altered for facilitating the description. Moreover, it is intended that the panel according to the invention comprises a plurality of push-buttons that are identical to the one that is shown and distributed systematically.
- Each push-button, that is indicated as a whole by
numeral 10, is divided in two separate bodies, an upper orouter body 10a and an inferior orinner body 10b. Both bodies are preferably obtained out of nylon or other pressed material. Anelastic membrane 12, made of rubber, caoutchouc or special plastic material, is pressed between the twoparts special gain joint faces mambrane 12. Hermetic seal is provided through ultrasonic sealing. The function of themembrane 12 is that of guaranteeing watertight seal with respect to possible infiltration of water, dust or other pulluting agents which could penetrate in theintersticies 14 between thebodies 10a of adjacent push-buttons. - The panel comprises a superficial
metallic escutcheon plate 16, preferably made of steel or pressure casted and painted alluminium, that surrounds externally the plurality of push-button bodies 10a. Theescutcheon plate 16 is inserted within a corresponding opening orseat 17 obtained in apanel 19 being integral with the outer casing of the equipment on which the panel of this invention is fitted. - For equipments destined to places having a rigorous winter climate, a heating
flat resistor 20 can be inserted between theescutcheon plate 16 and themembrane 12 so as to prevent ice from forming near the bush-button bodies 10a and therefore blocking them and render the whole panel inactive. - The outer push-
button body 10a and the inner one 10b are both advantageously made of nylon or other pressed material. Moreover, a push-button cover plate 21 is fixed on top of each one of theouter bodies 10a. Theplates 21 covering the upper surface of the push-buttons and copying the shape thereof are preferably made of stainless steel and have a symbol (number, letter or special symbol) obtained by chemical etching on their upper side. - An
antisinking layer 22, also made of nylon or other pressed material, is located under themembrane 12. Thelayer 22 is suitably perforated and shaped so as to contain the inner push-button bodies 10b and form supportingseats 23 for theinferior bases 10c thereof. - The
layer 22 forms an inferior rectangular hollow 24 surrounding and partially containing a printedcircuit 25. The latter comprises a plurality of uppersteel convex portions 26, each one located proximate to a push-button 10b and working as actuators for the push-buttons. These actuators, of the type normally used for tactile effect push-buttons are not described herinafter as being well known to a person skilled in the art. - A
peripheral groove 27 is obtained on the upper edge of thelayer 22 for containing aperipheral gasket 29, preferably made of rubber or other suitable material. Thegasket 29 is pressed between thelayer 22 and theouter panel 19, surrounding themembrane 12 and sealing the push-button panel. - In addition, to offer good rejection to electro-magnetical disturbances due to internal sources of the equipment and external radio frequency interferences, the printed
circuit 25 and theactuators 26 can be superiorly covered by at least one insulatinglayer 30 of polyester with emi/RFI shielding. - In an alternative embodiment which is suitable for equipments located in dark environments, the push-
buttons 10 may haveinner lights 31 for lightening the symbols from underneath. This possibility can also be used for lightening a single push-button to indicate that it has been selected. - As it can be appreciated, the push-button panel according to this invention appears with an outer flat surface, completely metallic and with no considerable asperity or possible hooking points. Besides having the required mechanical resistance, the panel guarantees a good hermetic sealing for the inner parts, avoiding water infiltration and encrustations forming due to dust or mud. In addition, the outer surface can resist common cleansing products and is easily washable being substantially smooth.
- The invention is not limited to the aforegoing description, which is to be considered purely as an illustration of the best method of implementing the panel, and modifications are possible in the terms of the shape, dimensions and arrangements of the parts and of the constructional and operational details. The invention includes all modifications which fall within its scope, as defined by the following claims.
Claims (6)
- An anti-vandal hermetically sealed push-button panel, comprising a plurality of push-buttons for actuating corresponding actuators (26) of a printed circuit (25), the push-buttons (10) being divided in two separate bodies, an outer body (10a) and an inner body (10b) operationally facing one of said actuators (26), the outer push-button bodies (10a) being surrounded by a superficial metallic escutcheon plate (16) substantially level with the uppermost surfaces (21) of the push-buttons; at least one elastic membrane (12) being pressed between said bodies (10a, 10b) and integral therewith; the panel further comprising an inner layer (22) of antisinking material; characterised in that said membrane (12) is further interposed between the surrounding plate (16) and said layer (22), said layer (22) being suitably perforated and shaped so as to operationally seat the inner push-button bodies (10b).
- A panel according to claim 1, characterised in that the top of said layer (22) is provided with a peripheral groove (27) for holding a peripheral gasket (29) surrounding the membrane (12).
- A panel according to claim 1, characterised in that the outer push-button bodies (10a) are covered by metal plates (21), preferably made of steel, having a shape congruent to the shape of the push-button.
- A panel according to claim 1, characterised in being fitted within an opening (17) of the casing of the equipment which the panel is to control; the upper surfaces (16, 21) being all metallic and substantially level with said casing.
- A panel according to claim 1, characterised in that said push-button bodies (10a, 10b), preferably made of nylon or other pressed material, are assembled to the membrane (12) by means of respective special gain joints (15a, 15b).
- A panel according to claim 5, characterised in that the junction between the bodies (10a, 10b) is effected by ultrasonic sealing.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITTO920213U | 1992-09-02 | ||
IT000213 IT227627Y1 (en) | 1992-09-02 | 1992-09-02 | VANDAL-PROOF HERMETIC SEAL KEYBOARD |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0585536A1 EP0585536A1 (en) | 1994-03-09 |
EP0585536B1 true EP0585536B1 (en) | 1996-09-04 |
Family
ID=11410207
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19930108328 Expired - Lifetime EP0585536B1 (en) | 1992-09-02 | 1993-05-24 | An anti-vandal hermetically sealed push-button panel |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0585536B1 (en) |
DE (1) | DE69304474T2 (en) |
ES (1) | ES2091520T3 (en) |
IT (1) | IT227627Y1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITTO980212A1 (en) * | 1998-03-12 | 1999-09-12 | Proto El Srl | HERMETICALLY KEYPAD |
JP4298871B2 (en) * | 1999-10-08 | 2009-07-22 | 矢崎総業株式会社 | Switch for display screen |
DE102009020411A1 (en) * | 2008-11-21 | 2010-05-27 | Linde Material Handling Gmbh | switching device |
US9082567B2 (en) | 2012-11-09 | 2015-07-14 | Blackberry Limited | Method and apparatus pertaining to keypad frets |
EP2731118B1 (en) * | 2012-11-09 | 2019-01-09 | BlackBerry Limited | Method and apparatus pertaining to keypad frets |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2046524A (en) * | 1979-02-28 | 1980-11-12 | Invader Keyboards Ltd | Improvements relating to electric switches |
FR2511941B1 (en) * | 1981-09-01 | 1988-02-05 | Telemecanique Electrique | MODULAR, WATERPROOF, TOUCHPAD KEYBOARD |
DE8221535U1 (en) * | 1982-07-29 | 1982-12-30 | Rafi Gmbh & Co Elektrotechnische Spezialfabrik, 7981 Berg | Push button |
DE3245372C2 (en) * | 1982-12-08 | 1986-10-23 | Deere & Co., Moline, Ill., US, Niederlassung Deere & Co. European Office, 6800 Mannheim | Harvesting device for harvesting machines |
GB9004532D0 (en) * | 1990-02-28 | 1990-04-25 | Lucas Ind Plc | Switch assembly |
DE9110444U1 (en) * | 1991-08-23 | 1991-11-21 | Werner Turck Gmbh & Co Kg, 5884 Halver | Short-stroke push button |
-
1992
- 1992-09-02 IT IT000213 patent/IT227627Y1/en active IP Right Grant
-
1993
- 1993-05-24 EP EP19930108328 patent/EP0585536B1/en not_active Expired - Lifetime
- 1993-05-24 ES ES93108328T patent/ES2091520T3/en not_active Expired - Lifetime
- 1993-05-24 DE DE1993604474 patent/DE69304474T2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE69304474D1 (en) | 1996-10-10 |
EP0585536A1 (en) | 1994-03-09 |
DE69304474T2 (en) | 1997-04-03 |
IT227627Y1 (en) | 1997-12-15 |
ITTO920213U1 (en) | 1994-03-02 |
ITTO920213V0 (en) | 1992-09-02 |
ES2091520T3 (en) | 1996-11-01 |
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