|
Match
|
Document |
Document Title |
|
|
7841791 |
Keyboard, lighting module for keyboard and electronic apparatus
According to one embodiment, a keyboard includes keytops supported on a substrate and a membrane switch placed between the keytops and the substrate. The membrane switch has an electrically...
|
|
|
7091952 |
Liquid proof switch array
Switch arrays such as keyboards are described. The switch arrays may include an array of dome spring elements. Each dome spring element may define a chamber, and a plurality of channels may...
|
|
|
6984793 |
Multidirectional switch actuator and a personal digital assistant using the same
An actuator suitable for multi-directional actuation of a push button switch is disclosed. This actuator has an actuation button attached to a plunger to define a predetermined angle therebetween....
|
|
|
6964532 |
Key array structure
A key array structure comprises a key array constituted by connecting a plurality of key members arranged in an array, it is characterized in that an elastic element is connected between each two...
|
|
|
6880995 |
Elastic-cup support for computer keyboard
An elastic-cup support for keyboard is in the form of a flat locating sheet located on a membrane-type switch circuit board of the keyboard, and provided at positions corresponding to membrane-type...
|
|
|
6805507 |
Keyboard device
In a keyboard device, a substrate is formed with multiple positioning members, each of which includes an upright first wall portion extending from one side of a punched hole, and a second wall...
|
|
|
6791480 |
Method of preventing and/or alleviating repetitive use injury to electronic computer keyboard operator
An electronic computer keyboard is constructed to provide the minimum keystroke resistance sufficient to prevent accidental switch closures otherwise resulting from the weight of the operator's...
|
|
|
6755582 |
Key structure
A key structure includes a set of key tops with contact footings of retaining hooks, an upper case with a plurality of insert holes wherein contact footings of retaining hooks are moveably inserted...
|
|
|
6672781 |
Reduced noise key unit
A key unit of a keyboard apparatus having at least one bumper extending from the key unit for cushioning the impact of the key unit against the enclosure of the keyboard apparatus when the key unit...
|
|
|
6672782 |
Keyboard structure
A keyboard structure, comprising: a substrate, a scissors mechanism, and a key lid. The scissors mechanism and the substrate are connected together. The scissors mechanism has a rotational...
|
|
|
6623195 |
Collapsible keyboard
A collapsible keyboard comprises at least one keyboard module, and each keyboard module has a plurality of keyswitches arranged in array pattern. At least one membrane circuit is provided to...
|
|
|
6572289 |
Pushbutton structure of keyboard
A pushbutton of a keyboard includes a cap supported on a base board by a linkage comprising first and second links pivoted together whereby the cap is movable from a released to a depressed...
|
|
|
6388219 |
Computer keyboard key device made from a rigid printed circuit board
A key device for a computer keyboard has a rigid printed circuit board, a flexible printed circuit board, and a key structure. The rigid printed circuit board has two adjacent but unconnected...
|
|
|
6331850 |
Collapsible keyboard
A collapsible keyboard assembly having, in one embodiment, a plurality of keys each of the plurality of keys having a top portion and a portion of the plurality of keys displaced adjacent one...
|
|
|
6328489 |
Key mechanism in a computer keyboard
A key mechanism includes a keycap, a base plate installed under the keycap having three guide channels, a connecting device installed between the keycap and the base plate for movably connecting...
|
|
|
6183150 |
Computer key
A computer key includes first and second linking frames interconnecting pivotally a base plate and a push button. The first and second linking frames are connected pivotally at first and second...
|
|
|
6011227 |
Push button switch
A push button switch for use in computer keyboards, comprising a membrane sheet 92 whose upper surface forms the switch base plate 90 upon which is mounted a rubber spring 93 which operates the...
|
|
|
6004051 |
Key structure of computer keyboard
A key structure of computer keyboard includes a base, a conductive film, an elastic member, a frame, and a cap. A plurality of coupling parts including sliding grooves are arranged on the cap and...
|
|
|
5971637 |
Low profile keyboard
A notebook computer (100) or other electronic device has a keyboard (106) using keys (40, 80) which can assume an active state for typing while a spring (64, 84) is pressed against a guide...
|
|
|
5951178 |
Expandable and compressible keyboard
A keyboard is provided having a lower frame with an elastic member installed on the surface thereof. An elevation plate is installed on the lower frame capable of ascending or descending by an...
|
|
|
5947616 |
Key structure for computer keyboards
An improved key structure for computer keyboards includes two crossed support frames that, after pivotal connection, have center limiting rods projecting respectively from outer sides of the...
|
|
|
5829896 |
Keycap spring installation tool
A device and method for installing a keycap spring in a computer keyboard having a vertical tube and a base for mounting the keycap spring at the bottom of the vertical tube. The device comprises a...
|
|
|
5456541 |
Key unit of a keyboard
An improved key unit of a keyboard comprising a key top, a keyboard plate and a conductive film; the conductive film being mounted beneath the keyboard plate; the keyboard plate has a mounting base...
|
|
|
5372442 |
Key structure for computer keyboards
A key unit includes a key a hollow housing securely mounted on a base frame of a computer keyboard, an actuating member, and a spring member. The hollow housing includes a top wall with an opening,...
|
|
|
5268545 |
Low profile tactile keyswitch
A low profile tactile keyswitch including a horizontally positioned elastic column spring which buckles under an axial load to provide a tactile feel for the keyswitch. The ends of the spring are...
|
|
|
5220318 |
Apparatus for selectively varying keyboard switching force
Apparatus for adjusting the key activating force or "touch" for a keyboard or for one or more function key groups on that keyboard to the needs of any individual operator.
|
|
|
5061094 |
Keyboard for typewriters, printers or the like
In a keyboard for typewriters, printers or the like, where a contact bearing film is disposed underneath the keys, there is provided for achieving a cost-efficient arrangement, while avoiding the...
|
|
|
4480937 |
Breakaway leafspring actuated keyswitch apparatus
A keyswitch apparatus for electronic typewriter keyboards and the like including a circuit board having at least one pair of electrical conductors, each conductor having contact means, at least one...
|
|
|
4407596 |
Case shift and lock input mechanism including a shift control switch
A case shift and lock input mechanism comprising a pair of independently depressable shift keylevers and a depressable shift lock keylever are assembled in a keyboard for actuating a single shift...
|
|
|
4362408 |
Means for avoiding accidental actuation of a critical function key
A keyboard having a plurality of keys thereon, with each key being moveable from a rest position along an actuation path having a makepoint therealong, whereby completion of an electrical circuit...
|
|
|
4313685 |
Push-button switch, particularly for keyboards of typewriters and similar devices
A push-button key switch for keyboards, having an actuating member, and a helical spring which functions as a return spring for the actuating member and as a movable contact element. The helical...
|
|
|
4274752 |
Keyboard multiple switch assembly
An electronic switch keyboard for typewriters or office machines includes a multiple switch at selected key positions to provide two signal inputs to a utilization device. A first capacitor switch...
|
|
|
4202640 |
Keyboard assembly
A keyboard assembly includes a U-shaped carrier member and a plurality of key members connected thereon by resiliently yieldable legs having detent portions which engage cooperating recesses...
|
|
|
4029915 |
Miniaturized calculator keyboard switch assembly having universally pivoted key actuators
A portable electronic calculator comprises a calculator body which supports a keyboard consisting of a single elongated row of keys each of which is adapted to be tilted in any one of four...
|
|
|
3913720 |
Typewriter with yieldable type bar
A typewriter comprising a segment unit including a plurality of type bars pivotally supported in an arcuate array, the type bars being spring urged toward a common imprinting point and normally...
|
|
|
3866006 |
PUSHBUTTON SWITCH WITH RECIPROCATING CAM
A pushbutton switch having a shaft with first and second operating or cam surfaces for sequentially controlling the movement of a spring biased movable contact into engagement with the fixed...
|
|
|
3761919 |
RADIATION SENSITIVE KEYBOARD
A radiation sensitive keyboard device having a plurality of photosensitive receptors mounted on a base member along with a plurality of light sources, and a plurality of manually actuatable key...
|
|
|
3715023 |
CAM-AND-LINKAGE ARRANGEMENT FOR SIMULTANEOUS MOVEMENT OF MULTIPLE KEYSTEMS CONNECTED TO A COMMON KEY
|
|
|
3478857 |
KEYBOARD PUSHBUTTON RETURN SPRING
|
|
|
3464531 |
MANUAL ELECTRONIC KEYBOARD
|
|
|
3387694 |
Key lever return mechanism
|
|
|
3197010 |
Machine control devices
|
|
|
2973079 |
Typewriters
|