摘要:
A first support lever having an upper end provided with a pair of pivots at the opposite side ends thereof and a lower end provided with a pair of pivots at the opposite side ends thereof, and a second support lever having an upper end provided with a pair of pivots at the opposite side ends thereof and a lower end provided with a pair of pivots at the opposite side ends thereof are pivotally joined together in a scissors-like form. The pivots of the respective upper ends of the first and second support levers are connected movably to the lower surface of a key, and the pivots of the lower end of the first support lever are received pivotally in downward open, substantially round recesses formed in a base plate at positions in the opposite corners of one end of an opening formed in the base plate. The pivots of the lower end of the second support lever are received slidably in downward open, elongate recesses formed in the base plate at positions in the opposite corners of the other end of the opening. The pivots of the lower ends of the first and second support levers can easily be fitted in the corresponding substantially round recesses and elongate recesses from under the base plate.
摘要:
A key switch of the invention includes a key top having a face on which various characters are displayed and a back face having an engaging portion, a guide support member having two hinge members and a holder plate. The holder plate is provided with support portions which are elastically moved when pushed down by the lower portion of the guide support member to pinch and support the lower portion, and further the engaging portions of the key top can also pinch and support the upper portion of the guide support member by pushing the upper portion. Accordingly, according to the key switch, the fabrication of the guide support member and the holder plate and the fabrication of the guide support member and the key top can be extremely easily performed, and the operating performance of the key top is improved.
摘要:
A keyswitch device has a good operational feeling in a keytop and is easily and simply assembled. When the keyswitch device is assembled, the engaging pins 55, 56 of the hinge member 47 and the engaging rod 61 of the hinge member 48 are slid on the holder plate 65 toward the open sides of the sliding slots 68, 69 in the holding portions 66, 67 while being guided through the guiding walls 73 . Further, the engaging pins 55, 56 and the engaging rod 61 are slid until the engaging rod 61 rides over the stopper 69A formed in the sliding slot 69. When the guide support member 46 and the keytop 41 are connected with each other, after the engaging rod 53 of the hinge member 47 is opposed to the vertical slot 44 of the keytop 41 and the engaging pins 63, 64 of the hinge member 48 are opposed to the long slot 45 of the keytop 41, the keytop 41 is slightly pressed downwardly. Accordingly, the engaging rod 53 of the hinge member 47 is snapped into the vertical slot 44 while being guided through the guide portion 44A and at the same time the engaging pins 63, 64 of the hinge member 48 are snapped into the long slot 45 while being guided through the guide portion 45A. Thus, not only the guide support member 46 and the holder plate 65 but also the guide support member 46 and the keytop 41 can be easily connected with each other.
摘要:
A keyswitch assembly is provided with a scissors-type lever positioned over a rubber spring having the shape resembling an asymmetrical inverted cup. The thickness of a portion of the side wall of the rubber spring on one side is greater than the thickness of a side wall on the opposed side of the rubber spring. Also, the top surface of the rubber spring is inclined so that the height of a portion of the outer surface of the upper wall of the rubber spring nearer to one side of the lever is smaller than that of the height of the spring nearer to the other side of the lever.
摘要:
A keyswitch assembly for a keyboard for a word processor or a computer comprises a key, a key support mechanism supporting the key formed by pivotally joining two support levers in a scissors-like form, a rubber spring disposed under the key support mechanism, and a support plate supporting the key support mechanism, the rubber spring and a printed wiring board on its surface. The key support mechanism is connected to the key and the support plate by slidably fitting pivots formed on the upper ends of the support levers in the slots of guiding parts formed on the lower surface of the key and slidably fitting pivots formed on the lower ends of the support levers in slots formed by raising portions of the support plate. The omission of a base plate, which is an essential component of a prior art keyswitch assembly, reduces the number of parts and the manufacturing cost and simplifies the construction of the keyswitch assembly.
摘要:
The present invention provides a keyswitch assembly having a key restrained from horizontal movement and from free vertical movement so that the key will not be moved by an accidental light touch to the key while providing a satisfactory touch of the key and reliable switching action. Pairs of pins formed at the opposite ends of four support members, four upper guide portions and four lower guide portions cooperate to support a key for vertical movement. The respective inner surfaces of the guide portions are substantially in contact with the respective outer surfaces of the support members, each with a very small clearance therebetween, respectively. A pressure plate, mounted on an elastic switching member, and the support members cooperate to support the key. Thus, the key is restrained from horizontal movement and from free vertical movement.
摘要:
In a key switch device 3, a guide member 10 constructed of a first and a second links 14 and 15, which guides a vertical movement of a key top 9, is movably mounted on a rigid circuit board 60 with a metal supporting member 64 provided with a slidably supporting portion 64A which slidably supports a slidable shaft 20 formed at a lower end of the second link 15 and a metal supporting member 65 provided with a rotatably supporting portion 65A which rotatably supports a rotatable shaft 18 formed at a lower end of the first link 14. The supporting members 64, 65 are fixed on copper foil land patterns 62, 63, respectively, by soldering.
摘要:
A keyswitch assembly having a mechanism for controlling touch of a plurality of keys simultaneously. Each key is vertically movably supported on a holder member by a key support assembly. The key support assembly has first and second links intersecting with each other and pivotally connected together at the intersecting portion. A first end of the first link is pivotally connected to the key and a second end of the first link is slidably movable in a horizontal direction and is pivotally connected to the holder member. A first end of the second link is pivotally connected to the holder member, and a second end of the second link is slidably movable in the horizontal direction and is pivotally connected to the key. A biasing segment is connected to the second end of the first link for urging the same. The biasing force of the biasing segment is controllable by moving an operation plate which is connected to the biasing segment.
摘要:
In a foldable keyboard, a cover member (100) includes a cover part (101) provided with a cover plate (104) and a pair of supporting elements (102, 103) formed on both ends of the cover plat. The supporting elements are each formed with a first slot (117) and a second slot (118). A support screw (123) passes with play through the first slot and is fixedly received in a baring hole (13A) of a bearing member (13) formed in a corner (12B) of a first keyboard unit (3) and a support screw (124) passes with play through the first slot and is fixedly received in a support hole (121) of a first base plate (5) formed in a corner (12A). A support screw (125) passes with play through the second slot and is fixedly received in a bearing hole (17A) of a bearing member (17) formed in a corner (16B) of a second keyboard unit (4) and a support screw (126) passes with play through the second slot and is fixedly received in a support hole (120) of a second base plate (8) formed in a corner (16A).
摘要:
In a key switch device, a guide member constructed of a first and a second links, which guides a vertical movement of a key top, is movably mounted on a support plate with a mounting member provided with a rotatable shaft formed at a lower end of the first link and a slidably supporting position which sidably supports a slidable shaft formed at a lower end of the second link. The mounting member 6 is fixed on the support plate with a first, second, and third adhesive layers.