EP1206786A1 - Drucktaste - Google Patents
DrucktasteInfo
- Publication number
- EP1206786A1 EP1206786A1 EP00956097A EP00956097A EP1206786A1 EP 1206786 A1 EP1206786 A1 EP 1206786A1 EP 00956097 A EP00956097 A EP 00956097A EP 00956097 A EP00956097 A EP 00956097A EP 1206786 A1 EP1206786 A1 EP 1206786A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- plunger
- push button
- guide
- button according
- housing
- 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
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
- H01H13/70—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
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H2009/0077—Details of switching devices, not covered by groups H01H1/00 - H01H7/00 using recyclable materials, e.g. for easier recycling or minimising the packing material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2221/00—Actuators
- H01H2221/024—Transmission element
- H01H2221/026—Guiding or lubricating nylon
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2221/00—Actuators
- H01H2221/058—Actuators to avoid tilting or skewing of contact area or actuator
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2221/00—Actuators
- H01H2221/06—Actuators to avoid sticking in on position
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2233/00—Key modules
- H01H2233/03—Key modules mounted on support plate or frame
- H01H2233/034—Snap coupling
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2237/00—Mechanism between key and laykey
- H01H2237/006—Guided plunger or ball
Definitions
- the invention relates to a push button according to the preamble of claim 1.
- Pushbuttons also known as keyboard pushbuttons, are the actuating element of data entry devices, such as keyboards, for error-free text, command and data entry. These keys must ensure, among other things, a sensitive force-displacement curve, which is generated in modern keyboards primarily by a silicone spring element which causes the reset after the key has been pressed and which counteracts a plunger firmly connected to the key cap when the key is pressed. If there is a tilting moment due to an eccentric actuation of the button, friction occurs in the button guide, which can lead to the tappet jamming.
- a single key is known from EP-0 122 128.
- the key cap there has a cylindrical plunger on which two axial guide webs are formed, each of which has a radially projecting hook attachment at the end of the plunger.
- a shaft-like guide opening which accommodates the plunger is provided in a housing and has corresponding longitudinal grooves for fixing the guide webs and their hook attachments.
- the tappet itself is longitudinally divided by a gap, with a guide web being assigned to each tappet part. With the help of the gap, which provides a resilient If the two tappet parts are pressed, the hook attachments perform the function of snap hooks that get caught on the ramp bodies in the longitudinal grooves and prevent the key cap from falling out of the housing.
- the inner wall of the guide opening is also used, since the hook attachments only permit lateral guidance of the guide webs in the longitudinal grooves and the key cap could therefore easily tip over to the front side of a guide web. Due to the friction surfaces thus present, disruptive frictional forces can develop when such a button is pressed.
- a better and smoother key cap guidance is achieved with the single key known from EP-0 301 385, which has a cylindrical plunger underneath its key cap, on the outside of which two diametrically opposed, axial guide webs are formed.
- the hollow tappet has two diametrically opposed wall tongues at its end, each of which is provided with a snap hook projecting radially outward at its free ends.
- the individual key is mounted in a housing which has a shaft-like guide opening in which the plunger, which acts at one end against a spring element and is provided with the guide webs and snap hooks, is axially displaceable.
- the ram is guided with its guide webs in longitudinal grooves, which are provided in a suitably assigned manner on the inside of the shaft-like guide opening.
- the button is held captively in the housing with the aid of the snap hooks, which are each assigned a retaining groove provided with a ramp body on the inside of the shaft-like guide opening.
- the object of the invention is to design the guide for a pushbutton so that, on the one hand, a jamming of the button with a simple one-piece construction is reliably prevented and, on the other hand, with the exception of the very elongated space bar
- a keyboard can also be built with multiple keys that no longer require a parallel guide ball to switch off the tilting moment when actuated.
- two substantially diagonally opposite tongues each with a snap hook at its free end, are firmly connected to the edge of the key cap, with two snap-in openings with an undercut for receiving in a suitable and associated manner at a distance from the shaft-like guide opening the snap hooks are provided.
- the geometry of the guide rod with its elongated sliding cylinders connected by stiffening ribs and the shortened snap hook tongues allow an internal industrial immersion lubrication in a liquid grease bath or in a pasty grease smoothed on the surface.
- a uniform plastic without special sliding properties eg polystyrene (PS)
- PS polystyrene
- the push button according to the invention can easily be designed as a multiple key provided without a parallel guide ball, and then one or more auxiliary guides, which are shorter in the axial direction, are additionally arranged on the bottom of the key cap in addition to the essentially centrally located plunger with the sliding cylinder are designed as the plunger.
- These auxiliary guides have essentially the same cross-sectional shape as the tappet with its sliding cylinders firmly connected via the stiffening ribs and are guided in guide openings arranged in the housing, which have the same design as the shaft-like guide openings for the tappets provided with the sliding cylinders.
- FIG. 1 shows a perspective view of an individual pushbutton according to the invention obliquely from above
- FIG. 2 is a perspective view of the one shown in FIG. 1 single push button shown obliquely from below
- FIG. 3 shows a diagonal side view of the same single pushbutton with a silicone spring
- FIG. 4 the principle of splash lubrication in a corresponding to FIG. 1 to 3 single keys executed
- FIG. 5 is a perspective view obliquely from below of a straight multiple pushbutton designed in accordance with the invention without a parallel guide ball,
- FIG. 6 is a perspective view obliquely from below of an angled multi-pushbutton without parallel guide bar, according to the invention
- FIG. 7 is a perspective view of a shaft-like guide opening for receiving a corresponding to the FIG. 1 to 3 single keys in a keyboard housing from obliquely below
- FIG. 8 is a perspective view of the shaft-like guide opening of FIG. 7 in a keyboard housing from obliquely above,
- FIG. 9 is a diagonal sectional view through the key guide in a keyboard housing in the starting position of a push button according to the invention
- FIG. 10 is a diagonal sectional view through the key guide in a keyboard housing in the end position of the push button according to FIG. 9th
- a key cap 1 made of a dimensionally stable plastic, for example polystyrene, is shown, which is composed of a cover part 2 and a plunger 3 extending underneath it in the axial direction.
- the cover part 2 as is usual with a keyboard pushbutton, consists of a square key cover 4, on which an approximately truncated pyramid-shaped key head 5 is placed, the top surface 6 of which is shaped as a recessed grip.
- the cylindrical plunger 3 protruding vertically downward from the key cover 4 is firmly attached.
- the plunger 3 is designed as a straight hollow cylinder with a circular cross section.
- stiffening ribs 7 are formed at equal angular distances from one another, on their free radial end faces a sliding cylinder 8 running parallel to the pushbutton longitudinal axis is firmly attached.
- the four diagonally opposite stiffening ribs 7 with their sliding cylinders 8 are arranged on the plunger 3 in such a way that two imaginary planes, each running through two diametrically opposite stiffening ribs 7, also pass through the corner edges of the square key cover 4.
- each of which has a snap hook 10 projecting outwards at its free end.
- the tongues 9 extend parallel to the pushbutton longitudinal axis and act as resilient snap arms. Compared to the length of the plunger 3, the tongues 9 with the snap hooks 10 are shorter at their ends.
- the four sliding cylinders 8, each of which is firmly connected to the plunger 3 via a stiffening rib 7, are designed to be longer at the bottom than the plunger 3 itself. As shown in FIG. 3 emerges, the depth of the stiffening ribs 7 is dimensioned such that the sliding cylinders 8 come to rest outside of a spring element which acts as a silicone spring 11 and acts against the plunger 3 from below.
- the geometry of the plunger 3 with its elongated sliding cylinders 8 and the shortened tongues 9, each provided with a snap hook 10, enables immersion lubrication of pushbuttons in a lubricant bath 12.
- the lubricant can be a liquid or a pastose grease that has been smoothed on the surface his.
- the immersion depth T corresponds to the vertical distance between the outermost end of the snap hooks 10 and the outermost end of the four sliding cylinders 8 of equal length.
- FIG. 5 and 6 are shown for two differently shaped multiple keys made of a dimensionally stable plastic, for example polystyrene, existing keycaps 13 and 14, respectively composed of a cover part 15 or 16, a plunger 17 or 18 extending underneath it in the axial direction and an auxiliary guide 19 or 20.
- the cover part 15 is in the embodiment of FIG. 5 from a rectangular key cover 21 and in the embodiment of FIG. 6 from an angled key hood 22, on which a laterally beveled key head 23 or 24 is placed, the top surface 25 or 26 of which is formed as a recessed grip (not visible in FIGS. 5 and 6).
- the cylindrical plunger 17 or 18 projecting vertically downward from the key cover 21 or 22 is firmly attached in a substantially central position.
- the auxiliary guide 19 or 20 which is shorter in the axial direction than the plunger 17 or 18 and has essentially the same cross-sectional shape as the plunger 17 or 18, is arranged parallel to it.
- FIG. 7 obliquely from below
- FIG. 8 shown obliquely from above
- housing 27 with a shaft-like cylindrical guide opening 28 in which an upwardly delimited free space 29 for
- the shaft-like guide opening 28 is provided with four axial longitudinal guides 30, which are diametrically opposed in pairs and whose diametrical planes form a right angle to one another.
- the longitudinal guides 30 are formally adapted to the sliding cylinders 8 (shown in FIGS. 1 to 3) in their contact area and extend over the entire height of the shaft-like guide opening 28, thus also including the height of the free space 29 of the silicone spring.
- the Snap-in openings 31 and 32 are arranged and formed in the housing 27 in such a way that the snap-in hooks 10 shown in FIGS.
- key cap 1 can engage, so that the latter is held captive in the shaft-like guide opening 28 of the housing 27.
- the sliding cylinder 8 attached to the tappet 3 via the stiffening ribs 7 and thus the entire key cap 1 are guided axially displaceably in the longitudinal guides 30 of the guide opening 28.
- FIG. 9 and 10 each show in diagonal section the key guide when installing the push buttons for a keyboard.
- the button cap 1 which is hooked into the snap-in openings of the housing 27 with its snap hooks 10, is inserted into the longitudinal guides 30 of the shaft-like guide opening 28 in the housing 27 from above with its sliding cylinders 8 fixedly attached to the tappet 3.
- FIG. 9 shows the end position of the keyboard pushbuttons.
- the key cap 1 is pressed into its end position.
- a free space 35 is available for the silicone spring 11 in its compressed state.
- the sliding cylinders 8 of the plunger 3 of the key cap 1 strike the silicone mat 33 outside the silicone spring 11.
Landscapes
- Push-Button Switches (AREA)
- Massaging Devices (AREA)
- Eye Examination Apparatus (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19940386A DE19940386C2 (de) | 1999-08-25 | 1999-08-25 | Drucktaste |
DE19940386 | 1999-08-25 | ||
PCT/DE2000/002450 WO2001015188A1 (de) | 1999-08-25 | 2000-07-26 | Drucktaste |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1206786A1 true EP1206786A1 (de) | 2002-05-22 |
EP1206786B1 EP1206786B1 (de) | 2003-10-01 |
Family
ID=7919612
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00956097A Expired - Lifetime EP1206786B1 (de) | 1999-08-25 | 2000-07-26 | Drucktaste |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1206786B1 (de) |
CN (1) | CN1169174C (de) |
AT (1) | ATE251333T1 (de) |
DE (2) | DE19940386C2 (de) |
TW (1) | TW466518B (de) |
WO (1) | WO2001015188A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10809809B2 (en) | 2016-06-14 | 2020-10-20 | Hewlett-Packard Development Company, L.P. | Recessed keycaps |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003178642A (ja) * | 2001-12-11 | 2003-06-27 | Polymatech Co Ltd | キーパッド及びその架橋硬化性樹脂層の分離方法 |
DE102006012649B4 (de) * | 2006-03-20 | 2008-10-16 | Cherry Gmbh | Drucktaste mit verbesserter Tastenknopfführung |
JP4850808B2 (ja) * | 2007-10-24 | 2012-01-11 | 日本開閉器工業株式会社 | 表示装置付き押ボタンスイッチ |
TWI399775B (zh) * | 2008-10-31 | 2013-06-21 | Hon Hai Prec Ind Co Ltd | 推鍵裝置 |
DE102013223843A1 (de) * | 2013-11-21 | 2015-06-03 | Zf Friedrichshafen Ag | Tastenknopf, Tastenschalter, Tastenrahmen und Leiterplatte für eine Dateneingabevorrichtung, Dateneingabevorrichtung und Verfahren zur Reduzierung eines Schaltweges eines Tastenschalters einer Dateneingabevorrichtung |
DE102017106406A1 (de) * | 2017-03-24 | 2018-09-27 | Cherry Gmbh | Tastenmodul |
CN113451065A (zh) * | 2020-03-27 | 2021-09-28 | 致伸科技股份有限公司 | 按键结构 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59186214A (ja) * | 1983-04-08 | 1984-10-23 | 富士通株式会社 | 押釦スイツチ |
JPS59195632U (ja) * | 1983-06-15 | 1984-12-26 | 日通工株式会社 | 押ボタンスイツチ |
EP0301385B1 (de) * | 1987-07-30 | 1993-12-08 | Siemens Nixdorf Informationssysteme Aktiengesellschaft | Einzeltaste |
US5283408A (en) * | 1992-08-04 | 1994-02-01 | Silitek Corporation | Structure of key switch |
-
1999
- 1999-08-25 DE DE19940386A patent/DE19940386C2/de not_active Expired - Fee Related
-
2000
- 2000-07-26 WO PCT/DE2000/002450 patent/WO2001015188A1/de active IP Right Grant
- 2000-07-26 DE DE50003934T patent/DE50003934D1/de not_active Expired - Lifetime
- 2000-07-26 CN CNB008120625A patent/CN1169174C/zh not_active Expired - Fee Related
- 2000-07-26 AT AT00956097T patent/ATE251333T1/de not_active IP Right Cessation
- 2000-07-26 EP EP00956097A patent/EP1206786B1/de not_active Expired - Lifetime
- 2000-09-02 TW TW089117057A patent/TW466518B/zh not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
See references of WO0115188A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10809809B2 (en) | 2016-06-14 | 2020-10-20 | Hewlett-Packard Development Company, L.P. | Recessed keycaps |
Also Published As
Publication number | Publication date |
---|---|
DE19940386C2 (de) | 2002-08-14 |
CN1169174C (zh) | 2004-09-29 |
DE50003934D1 (de) | 2003-11-06 |
TW466518B (en) | 2001-12-01 |
ATE251333T1 (de) | 2003-10-15 |
EP1206786B1 (de) | 2003-10-01 |
WO2001015188A1 (de) | 2001-03-01 |
DE19940386A1 (de) | 2001-04-05 |
CN1371523A (zh) | 2002-09-25 |
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