WO2003025960A1 - Keyboard for communications terminals - Google Patents

Keyboard for communications terminals Download PDF

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Publication number
WO2003025960A1
WO2003025960A1 PCT/DE2002/003497 DE0203497W WO03025960A1 WO 2003025960 A1 WO2003025960 A1 WO 2003025960A1 DE 0203497 W DE0203497 W DE 0203497W WO 03025960 A1 WO03025960 A1 WO 03025960A1
Authority
WO
WIPO (PCT)
Prior art keywords
keys
upper shell
keyboard
keyboard according
circuit board
Prior art date
Application number
PCT/DE2002/003497
Other languages
German (de)
French (fr)
Inventor
Udo Beeker
Melanie De Filippis
Original Assignee
Siemens Aktiengesellschaft
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 Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO2003025960A1 publication Critical patent/WO2003025960A1/en

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
    • H01H13/7006—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 comprising a separate movable contact element for each switch site, all other elements being integrated in layers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2209/00—Layers
    • H01H2209/068—Properties of the membrane
    • H01H2209/082—Properties of the membrane transparent
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2221/00—Actuators
    • H01H2221/002—Actuators integral with membrane
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2221/00—Actuators
    • H01H2221/07—Actuators transparent
    • 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
    • H01H2223/00—Casings
    • H01H2223/034—Bezel
    • H01H2223/0345—Bezel with keys positioned directly next to each other without an intermediate bezel or frame
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2227/00—Dimensions; Characteristics
    • H01H2227/036—Minimise height
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2231/00—Applications
    • H01H2231/022—Telephone handset
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2233/00—Key modules
    • H01H2233/07—Cap or button on actuator part
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2233/00—Key modules
    • H01H2233/07—Cap or button on actuator part
    • H01H2233/072—Locating pins
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2233/00—Key modules
    • H01H2233/07—Cap or button on actuator part
    • H01H2233/074—Snap coupling

Definitions

  • the present invention relates to a keyboard for communication terminals consisting of underscore and upper shell, openings being provided in the upper shell for the keys of the keyboard.
  • silicone mats have been used as the carrier material for the individual keys.
  • the risk of buttons being torn out is very high, since silicone is not robust enough.
  • Other solutions, in which the keys are movably attached in an additional component, are very complex to assemble and require a relatively high overall height.
  • the object of the present invention is to provide a keyboard with a low installation height, which is at the same time very robust.
  • This object is achieved according to the invention for the keyboard mentioned at the outset by providing a carrier film between the upper shell and the circuit board carrying the switching contacts, which has actuators on the side facing the circuit board and receptacles for the keys on the other side, the receptacles in the project through the openings in the upper shell and rest with their edges on the underside of the upper shell, and that the individual buttons are attached to the receptacles.
  • the keyboard according to the invention is characterized by a low installation height and enables simple assembly and simple handling during manufacture.
  • the use of a PC carrier film results in a keyboard which is robust in use and which, owing to its low installation height, permits a high degree of freedom in the design of the actual keys, ie in the design of the keys.
  • FIG. 1 shows a partial cross section through a keyboard constructed according to the present invention
  • Figure 2 is a schematic exploded view of the main components forming the keyboard.
  • a transparent polycarbonate carrier film 3 is arranged within the housing between the underside of the upper shell 1 and a printed circuit board 2.
  • the transparent film also serves as a light guide.
  • This carrier film 3 has actuators 4 on its side facing the printed circuit board 2. These are used to actuate so-called "crack frogs" 8, which are used to produce the appropriate contact on the printed circuit board 2 and at the same time ensure good tactile behavior (click).
  • On the other side of the PC carrier film 3 are recordings 5 for the key body, for. B. 6, 7 provided. It should be noted here that the actuators 4 and the receptacles 5 form a unit with the PC carrier film 3 and are also transparent.
  • the receptacles 5 for the key bodies are equivalent to the upper shell 1 so that they protrude through the openings for the individual key bodies in the upper shell 1 and at the same time rest on the underside of the upper shell 1.
  • the key bodies 6, 7, which can also be made transparent, are fastened to the receptacles 5 of the PC carrier film 3 by being glued, welded, latched, clamped or hot caulked to the receptacle.
  • the key bodies can have positioning pins 10 on their underside, which are hot caulked in corresponding openings in the receptacles 5.
  • positioning pins 10 can also be provided for better alignment of the key body even when fastened by means of gluing or welding.
  • a corrugated membrane 9 which, for. B. consists of silicone, provided.
  • This membrane serves as dust protection and above all for tolerance compensation, while its corrugated shape provides the necessary restoring force after the user releases the button body.

Landscapes

  • Push-Button Switches (AREA)

Abstract

According to the invention, a carrier film (3) is provided between the upper shell (1) of a communications terminal and the printed circuit board (2) that bears the switching contacts. Said film has actuators (4) on the side facing the printed circuit board and receiving areas (5) for the keys (6, 7) on the other side. When assembled, the receiving areas (5) project through openings in the upper shell (1) and the individual keys (6, 7) are fixed into the receiving areas (4).

Description

Beschreibungdescription
Tastatur für KommunikationsendgeräteKeyboard for communication terminals
Die vorliegende Erfindung betrifft eine Tastatur für aus Unterstrich und Oberschale bestehende Kommunikationsendgeräte, wobei in der Oberschale Durchbrüche für die Tasten der Tastatur vorgesehen sind.The present invention relates to a keyboard for communication terminals consisting of underscore and upper shell, openings being provided in the upper shell for the keys of the keyboard.
Bisher wurden als Trägermaterial für die einzelnen Tasten Silikonmatten verwendet. Bei der Verwendung von Silikonmatten ist die Gefahr des Ausreißens von Tasten sehr hoch, da Silikon nicht robust genug ist. Andere Lösungen, bei denen die Tasten beweglich in einem Zusatzbauteil befestigt sind, sind bezüglich der Montage sehr aufwendig und benötigen eine verhältnismäßig hohe Bauhöhe.So far, silicone mats have been used as the carrier material for the individual keys. When using silicone mats, the risk of buttons being torn out is very high, since silicone is not robust enough. Other solutions, in which the keys are movably attached in an additional component, are very complex to assemble and require a relatively high overall height.
Aufgabe der vorliegenden Erfindung ist es, eine Tastatur mit einer geringen Einbauhöhe anzugeben, welche gleichzeitig sehr robust aufgebaut ist.The object of the present invention is to provide a keyboard with a low installation height, which is at the same time very robust.
Diese Aufgabe wird für die eingangs genannte Tastatur erfindungsgemäß dadurch gelöst, dass zwischen der Oberschale und der die Schaltkontakte tragenden Leiterplatte eine Trägerfolie vorgesehen ist, welche auf der der Leiterplatte zugewandten Seite Aktuatoren und auf der anderen Seite Aufnahmen für die Tasten aufweist, wobei die Aufnahmen im eingebauten Zustand durch die Durchbrüche in der Oberschale hindurchragen und mit ihren Rändern an der Unterseite der Oberschale anliegen, und dass die einzelnen Tasten auf den Aufnahmen befestigt sind.This object is achieved according to the invention for the keyboard mentioned at the outset by providing a carrier film between the upper shell and the circuit board carrying the switching contacts, which has actuators on the side facing the circuit board and receptacles for the keys on the other side, the receptacles in the project through the openings in the upper shell and rest with their edges on the underside of the upper shell, and that the individual buttons are attached to the receptacles.
Die erfindungsgemäße Tastatur zeichnet sich durch eine geringe Einbauhöhe aus und ermöglicht eine einfache Montage und ein einfaches Handling bei der Fertigung. Durch die Verwendung einer PC-Trägerfolie ergibt sich eine im Gebrauch robuste Tastatur, welche aufgrund ihrer geringen Einbauhöhe bei der Gestaltung der eigentlichen Tasten, d. h. beim Design der Tasten, hohe Freiheitsgrade zulässt.The keyboard according to the invention is characterized by a low installation height and enables simple assembly and simple handling during manufacture. The use of a PC carrier film results in a keyboard which is robust in use and which, owing to its low installation height, permits a high degree of freedom in the design of the actual keys, ie in the design of the keys.
Weitere Ausgestaltungen der erfindungsgemäßen Tastatur ergeben sich aus den Unteransprüchen sowie aus einer nachfolgenden Beschreibung eines Ausführungsbeispiels anhand der beigefügten Zeichnung.Further refinements of the keyboard according to the invention result from the subclaims and from a subsequent description of an exemplary embodiment with reference to the accompanying drawing.
In der Zeichnung zeigenShow in the drawing
Figur 1 einen teilweisen Querschnitt durch eine gemäß der vorliegenden Erfindung aufgebaute Tastatur, und1 shows a partial cross section through a keyboard constructed according to the present invention, and
Figur 2 eine schematische Explosionsdarstellung der die Tastatur bildenden Hauptbestandteile.Figure 2 is a schematic exploded view of the main components forming the keyboard.
Bei der Darstellung des Ausführungsbeispiels sind von dem Gehäuse mit der erfindungsgemäßen Tastatur lediglich Teile der Oberschale 1 mit den Durchbrüchen für die einzelnen Tasten dargestellt. Innerhalb des Gehäuses ist zwischen der Unterseite der Oberschale 1 und einer Leiterplatte 2 eine transparente Polycarbonat-Trägerfolie 3 angeordnet. Die transparente Folie dient zusätzlich als Lichtleiter.In the representation of the exemplary embodiment, only parts of the upper shell 1 with the openings for the individual keys are shown of the housing with the keyboard according to the invention. A transparent polycarbonate carrier film 3 is arranged within the housing between the underside of the upper shell 1 and a printed circuit board 2. The transparent film also serves as a light guide.
Diese Trägerfolie 3 weist auf ihrer der Leiterplatte 2 zugewandten Seite Aktuatoren 4 auf. Diese dienen zur Betätigung sogenannter "Knackfrösche" 8, die zur Herstellung des entsprechenden Kontaktes auf der Leiterplatte 2 dienen und gleichzeitig für ein gutes taktiles Verhalten (Klick) sorgen. Auf der anderen Seite der PC-Trägerfolie 3 sind Aufnahmen 5 für die Tastenkörper, z. B. 6, 7, vorgesehen. Hier ist festzustellen, dass die Aktuatoren 4 und die Aufnahmen 5 eine Einheit mit der PC-Trägerfolie 3 bilden und ebenfalls transparent ausgebildet sind. Die Aufnahmen 5 für die Tastenkörper sind äquivalent zu der Oberschale 1 so ausgebildet, dass sie zum einen durch die Durchbrüche für die einzelnen Tastenkörper in der Oberschale 1 hindurchragen und gleichzeitig an der Unterseite der Oberschale 1 anliegen.This carrier film 3 has actuators 4 on its side facing the printed circuit board 2. These are used to actuate so-called "crack frogs" 8, which are used to produce the appropriate contact on the printed circuit board 2 and at the same time ensure good tactile behavior (click). On the other side of the PC carrier film 3 are recordings 5 for the key body, for. B. 6, 7 provided. It should be noted here that the actuators 4 and the receptacles 5 form a unit with the PC carrier film 3 and are also transparent. The receptacles 5 for the key bodies are equivalent to the upper shell 1 so that they protrude through the openings for the individual key bodies in the upper shell 1 and at the same time rest on the underside of the upper shell 1.
Die Positionsgenauigkeit zwischen PC-Trägerfolie 3, den Tastenkörpern, z. B. 6, 7, und der Leiterplatte 2 wird mit Hilfe von Positionierungsstiften 11, welche auf der Unterseite der Oberschale 1 angebracht sind, und durch die PC-Trägerfolie 3 und die Leiterplatte 2 hindurchragen, gewährleistet.The position accuracy between PC carrier film 3, the key bodies, for. B. 6, 7, and the circuit board 2 is ensured by means of positioning pins 11, which are attached to the underside of the upper shell 1, and protrude through the PC carrier film 3 and the circuit board 2.
Die Tastenkörper 6, 7, welche ebenfalls transparent ausgeführt sein können, werden auf den Aufnahmen 5 der PC- Trägerfolie 3 befestigt, indem sie auf die Aufnahme aufgeklebt, aufgeschweißt, gerastet, geklemmt oder mit der Aufnahme heiß verstemmt werden.The key bodies 6, 7, which can also be made transparent, are fastened to the receptacles 5 of the PC carrier film 3 by being glued, welded, latched, clamped or hot caulked to the receptacle.
Zum Heißverstemmen können die Tastenkörper an ihrer Unterseite Positionierungsstifte 10 aufweisen, welche in entsprechenden Durchbrüchen der Aufnahmen 5 heiß verstemmt werden. Darüber hinaus können aber auch bei einer Befestigung mittels Kleben oder Verschweißen zusätzlich Positionierungsstifte 10 zur besseren Ausrichtung des Tastenkörpers vorgesehen werden.For hot caulking, the key bodies can have positioning pins 10 on their underside, which are hot caulked in corresponding openings in the receptacles 5. In addition, positioning pins 10 can also be provided for better alignment of the key body even when fastened by means of gluing or welding.
Erfindungsgemäß ist zwischen der Oberseite der Oberschale 1 und den Randbereichen der Tastenkörper, z. B. 6, 7 eine gewellte Membran 9, welche z. B. aus Silikon besteht, vorgesehen. Diese Membran dient einmal als Staubschutz und darüber zum Toleranzausgleich, während ihre gewellte Form für die notwendige Rückstellungskraft nach dem Loslassen der Tastenkörper durch den Benutzer sorgt. According to the invention between the top of the upper shell 1 and the edge regions of the key body, for. B. 6, 7 a corrugated membrane 9, which, for. B. consists of silicone, provided. This membrane serves as dust protection and above all for tolerance compensation, while its corrugated shape provides the necessary restoring force after the user releases the button body.

Claims

Patentansprüche claims
1. Tastatur für aus Unter- und Oberschale bestehende Kommunikationsendgeräte, wobei in der Oberschale Durchbrüche für die Tasten der Tastatur vorgesehen sind, dadurch gekennzeichnet, dass zwischen der Oberschale (1) und der die Schaltkontakte tragenden Leiterplatte (2) eine Trägerfolie (3) vorgesehen ist, welche auf der der Leiterplatte zugewandten Seite Aktuatoren (4) und auf der anderen Seite Aufnahmen (5) für die Tasten (6, 7) aufweist, wobei die Aufnahmen (5) im eingebauten Zustand durch die Durchbrüche in der Oberschale (1) hindurchragen und mit ihren Rändern an der Unterseite der Oberschale (1) anliegen, und dass die einzelnen Tasten (6, 7) auf den Aufnahmen (4) befestigt ■ sind.1. Keyboard for communication terminals consisting of lower and upper shell, openings in the upper shell for the keys of the keyboard are provided, characterized in that a carrier film (3) is provided between the upper shell (1) and the circuit board (2) carrying the switching contacts which has actuators (4) on the side facing the printed circuit board and receptacles (5) for the keys (6, 7) on the other side, the receptacles (5) in the installed state through the openings in the upper shell (1) protrude through and rest with their edges on the underside of the upper shell (1), and that the individual buttons (6, 7) are attached to the receptacles (4).
2. Tastatur nach Anspruch 1, dadurch gekennzeichnet, dass die Trägerfolie (3) transparent ist.2. Keyboard according to claim 1, characterized in that the carrier film (3) is transparent.
3. Tastatur nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass zwischen der Oberseite der Oberschale (1) und den Unterseiten der Tasten (6, 7) eine gewellte Membran (9) vorgesehen ist.3. Keyboard according to claim 1 or 2, characterized in that a corrugated membrane (9) is provided between the top of the upper shell (1) and the undersides of the keys (6, 7).
4. Tastatur nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass an der Unterseite der Oberschale (1) Positionierungsstifte (11) angeordnet sind, welche in entsprechende Durchbrüche in der Leiterplatte (1) eingreifen.4. Keyboard according to one of the preceding claims, characterized in that on the underside of the upper shell (1) positioning pins (11) are arranged which engage in corresponding openings in the circuit board (1).
5. Tastatur nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Tasten auf die Aufnahmen geklebt sind. 5. Keyboard according to one of claims 1 to 4, characterized in that the keys are glued to the recordings.
6. Tastatur nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Tasten mit den Aufnahmen verschweißt sind.6. Keyboard according to one of claims 1 to 4, characterized in that the keys are welded to the receptacles.
7. Tastatur nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Tasten mit den Aufnahmen heiß verstemmt sind.7. Keyboard according to one of claims 1 to 4, characterized in that the keys are hot caulked with the recordings.
8. Tastatur nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Tasten auf die Aufnahmen geklemmt sind.8. Keyboard according to one of claims 1 to 4, characterized in that the keys are clamped on the recordings.
9. Tastatur nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Tasten auf die Aufnahmen aufgerastet sind. 9. Keyboard according to one of claims 1 to 4, characterized in that the keys are snapped onto the recordings.
PCT/DE2002/003497 2001-09-17 2002-09-17 Keyboard for communications terminals WO2003025960A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10145769.3 2001-09-17
DE2001145769 DE10145769A1 (en) 2001-09-17 2001-09-17 Keyboard for communication terminals

Publications (1)

Publication Number Publication Date
WO2003025960A1 true WO2003025960A1 (en) 2003-03-27

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Cited By (16)

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Publication number Priority date Publication date Assignee Title
EP1484778A2 (en) 2003-06-03 2004-12-08 Polymatech Co., Ltd. Key sheet
WO2005071705A2 (en) * 2004-01-26 2005-08-04 Siemens Aktiengesellschaft Keypad unit for a communications terminal
WO2008033214A2 (en) * 2006-09-11 2008-03-20 Apple Inc. Hybrid button
US8866780B2 (en) 2007-12-03 2014-10-21 Apple Inc. Multi-dimensional scroll wheel
US8872771B2 (en) 2009-07-07 2014-10-28 Apple Inc. Touch sensing device having conductive nodes
US8933890B2 (en) 2003-11-25 2015-01-13 Apple Inc. Techniques for interactive input to portable electronic devices
US8952886B2 (en) 2001-10-22 2015-02-10 Apple Inc. Method and apparatus for accelerated scrolling
US9354751B2 (en) 2009-05-15 2016-05-31 Apple Inc. Input device with optimized capacitive sensing
US9360967B2 (en) 2006-07-06 2016-06-07 Apple Inc. Mutual capacitance touch sensing device
US9367151B2 (en) 2005-12-30 2016-06-14 Apple Inc. Touch pad with symbols based on mode
US9405421B2 (en) 2006-07-06 2016-08-02 Apple Inc. Mutual capacitance touch sensing device
US9454256B2 (en) 2008-03-14 2016-09-27 Apple Inc. Sensor configurations of an input device that are switchable based on mode
US10139870B2 (en) 2006-07-06 2018-11-27 Apple Inc. Capacitance sensing electrode with integrated I/O mechanism
US10180732B2 (en) 2006-10-11 2019-01-15 Apple Inc. Gimballed scroll wheel
US10353565B2 (en) 2002-02-25 2019-07-16 Apple Inc. Input apparatus and button arrangement for handheld device
US10866718B2 (en) 2007-09-04 2020-12-15 Apple Inc. Scrolling techniques for user interfaces

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Cited By (23)

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Publication number Priority date Publication date Assignee Title
US9977518B2 (en) 2001-10-22 2018-05-22 Apple Inc. Scrolling based on rotational movement
US9009626B2 (en) 2001-10-22 2015-04-14 Apple Inc. Method and apparatus for accelerated scrolling
US8952886B2 (en) 2001-10-22 2015-02-10 Apple Inc. Method and apparatus for accelerated scrolling
US10353565B2 (en) 2002-02-25 2019-07-16 Apple Inc. Input apparatus and button arrangement for handheld device
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WO2005071705A3 (en) * 2004-01-26 2008-12-31 Siemens Ag Keypad unit for a communications terminal
WO2005071705A2 (en) * 2004-01-26 2005-08-04 Siemens Aktiengesellschaft Keypad unit for a communications terminal
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US10139870B2 (en) 2006-07-06 2018-11-27 Apple Inc. Capacitance sensing electrode with integrated I/O mechanism
US9360967B2 (en) 2006-07-06 2016-06-07 Apple Inc. Mutual capacitance touch sensing device
US9405421B2 (en) 2006-07-06 2016-08-02 Apple Inc. Mutual capacitance touch sensing device
US10359813B2 (en) 2006-07-06 2019-07-23 Apple Inc. Capacitance sensing electrode with integrated I/O mechanism
US10890953B2 (en) 2006-07-06 2021-01-12 Apple Inc. Capacitance sensing electrode with integrated I/O mechanism
WO2008033214A3 (en) * 2006-09-11 2008-05-15 Apple Inc Hybrid button
WO2008033214A2 (en) * 2006-09-11 2008-03-20 Apple Inc. Hybrid button
US10180732B2 (en) 2006-10-11 2019-01-15 Apple Inc. Gimballed scroll wheel
US10866718B2 (en) 2007-09-04 2020-12-15 Apple Inc. Scrolling techniques for user interfaces
US8866780B2 (en) 2007-12-03 2014-10-21 Apple Inc. Multi-dimensional scroll wheel
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