Abstract: To effectively and easily suppress squealing noise occurring when a steering shaft is in strong contact with a bumper portion, a sealing device (1) between a housing and a shaft has a first molding (11) including a bellows-like flexible portion (15) the bumper portion (16), and a seal lip portion (17) integrally on the inner peripheral side of an outer peripheral fixing portion (12) secured to the housing, and a second molding (21) including a second flexible portion (25) and a second bumper portion (26) integrally on the inner peripheral side of a second fixing portion (22) secured to the outer peripheral fixing portion (12), fall out prevention portions (19, 29) are respectively provided on the inner peripheral surfaces of the bumper portion (16) and second bumper portion (26), and resin slide members (20, 30) are fitted without bonding to the fall out prevention portions (19, 29), respectively.

Abstract: To hold a pulsar ring (1) of a magnetic rotary encoder well concentrically by a pressure inserting jig (4) when the pulsar ring is installed on a rotary body (3), the pulsar ring (1) comprises a metallic annular holder (10) and a pulsar main body (20) of a magnetic rubber material, the holder (10) comprises a disk portion (11) where the pulsar body (20) is bonded, a mounting tube portion (12) having a diameter smaller than the outer diameter of the disk portion (11) and being fixed to the rotary body (3), a fold-back portion (15) folded inward, and an intermediate portion (13) extending therefrom toward the mounting tube portion (12) so as to be separated from the disk portion (11), and the outer circumference of the fold-back portion (15) or a guide portion (22) mounted thereon is fitted to a circumferential wall portion (42) of the jig (4).

Abstract: To provide a sealing device having a side lip in slidably contact with a mate member like a slinger, wherein a contact state of the side lip is stabilized and sliding resistance of the side lip is reduced when lip tightening margin becomes maximum, a contact surface (6c) of a contact part (6a) of the side lip (6) has a cross-section of a straight shape in a free state, a noncontact part (6b) of the side lip (6) has a grease holding portion (11) for holding grease supplied to the contact part (6a), the grease holding portion (11) is arranged at a position becoming the boundary between the contact part (6a) and the noncontact part (6b) when the width (W1) of the contact part (6a) and lip tightening margin become maximum, and the grease holding portion (11) consists of an annular groove (12) or radial grooves.

Abstract: To avoid interference of a side lip when plural sealing devices are piled up, a sealing device installed on one member of two members rotating relatively is constructed by combining a mounting ring fitted on the one member and a rubber-like elastic body attached on the mounting ring, and has a side lip formed by the elastic body, the mounting ring has a cylinder portion at a position fitted on the peripheral surface of the one member, the elastic body has a rubber step part provided at axially one side of the cylinder portion, the cylinder portion and the rubber step part have a positional relationship that the former of an upper sealing device is placed on the latter of the one sealing device when piled up, and the side lip of the one sealing device is dimensioned not to interfere with the upper sealing device even when they are in such a positional relationship.

Abstract: A sealing device in which a magnetic encoder is protected so as to improve detecting precision and reliability, without increasing the number of parts and assembling time and without enlarging a setting space, the sealing device is structured such that a detected portion is arranged in the sealed fluid side of an annular member. A first annular member fitted to a shaft is formed with an axial direction portion and diametrical direction portions extending in the inward and outward diametrical directions from the axial direction portion. One of the diametrical direction portions supports the detected portion in the sealed fluid side. A seal lip is in slidable contact with the other diametrical direction portion for sealing, and the seal portion is formed with the seal lip and the micro space.

Abstract: To secure stability of the stacked sealing devices, a magnetic encoder-equipped sealing device has the slinger attached to either of two relatively rotating members and the lip seal attached to the other, the slinger has a magnetic encoder at one end face in the axial direction, the lip seal is formed by attaching a seal lip to an attachment ring and is slidably in contact with the slinger, an adhesion prevention projection, formed from a rubbery elastic body, is provided on the other end face in the axial direction of the attachment ring to prevent mutual adhesion of sealing devices when they are stacked, and the adhesion prevention projection (7) has a tapered cross-sectional shape in which an inner peripheral side-face (7a) of the projection (7) tilts relative to a rotation axis (O) at an angle greater than the tilt angle of an outer peripheral side-face (7b).

Abstract: A magnetic encoder, which is formed annularly of a magnetic rubber material, is magnetized to be multipolar in the circumferential direction and has a detected surface read by a magnetic sensor, is provided with a three-dimensional shape (3) such as annular steps with a lower surface portion between the higher surface portions at outer and inner circumferential sides, protrusions or notches provided radially, concentrically, in a grid shape, or in a logo pattern, on the detected surface (2), in order to reduce an area which tends to be scratched in the detected surface (2) and to make a scratch inconspicuous when the detected surface (2) is scratched, thereby preventing a significant scratch on the detected surface (2) and make a scratch inconspicuous even if scratched, to prevent reduction in a product value.

Abstract: To prevent grease applied to seal lips of sealing device from adhering to an attaching ring of an adjacent sealing device when the sealing devices are stacked in the axial direction, a sealing device (1) comprising seal lips (12, 13) made of a rubber-like elastic material and integrally provided on an attaching ring (11) has a projection (17) made of a rubber-like elastic material and provided at an outer periphery of the attaching ring (11) so that the projection (17) serves as a retention portion to contact with the attaching ring (11) of the adjacent sealing device (1) at the side to which the seal lips (12, 13) are directed when the sealing devices (1) are stacked, whereby desired gaps (?1, ?2) are retained between grease (G) applied to the sealing lips (12, 13) and the attaching ring (11) of the adjacent sealing device (1).

Abstract: A sealing device comprises a stationary-side installation ring (11) fixed to an outer stationary-side member (201), a rotation-side installation ring (12) fixed to an inner rotation-side member (202), a stationary-side lip (13) provided on the stationary-side installation ring (11) to be slidably in contact with the rotation-side installation ring (12) by its tip, rotation-side lips (14, 15) formed on the rotation-side installation ring (12) to be slidably in contact with the stationary-side installation ring (11) by their tips, a pulsar ring (17) formed of a synthetic resin or rubber-like elastic material mixed with magnetic powder on the rotation-side installation ring (12) and multipolar magnetized, and a collar portion (17a) formed on an outer periphery of the pulsar ring (17) at the outer side than the rotation-side lips (14, 15) to closely face the stationary-side member (201) or the stationary-side installation ring (11), thereby an excellent sealing ability being given.

Abstract: A pulsar ring for a rotary encoder has a mounting ring (1) made of a non-magnetic material, with one end being fixed to an inner ring (202) at the rotation side and the other end being positioned in proximity to an outer ring (201) at the stationary side via labyrinth-shaped clearances (G1, G2, G3), a pulsar ring body (2) formed by a synthetic resin material or rubber-like elastic material mixed with magnetic powder, magnetized to have multiple poles, and integrally installed on an inner surface of the mounting ring (1), and a seal ring (3) disposed inside the mounting ring (1), fixed to the inner ring (202) via the mounting ring (1), and slidably in contact with the outer ring (201), whereby the pulsar ring is hardly exposed to disturbances by foreign matters, muddy water, and external magnetic fields from the outside, and consequently can maintain a stable magnetic pattern.

Abstract: To prevent deterioration of sealing ability during installation of a second seal ring, facilitate parting of a first seal ring from a mold, and enhance degree of freedom of setting the thickness of a seal lip, a sealing device has a first seal ring (20) integrally formed with an installation ring (10) from a rubber-like elastic material and a second seal ring (30) assembled with the first seal ring (20), the first seal ring (20) has a seal lip (25) formed to project outward from a tip (11a) of a tube section (11) of the installation ring (10), and the seal lip (25) is made to be slidably in close contact with the outer peripheral surface of the second seal ring (30) in a state that with the seal lip (25) is reversed toward the inner periphery of the tube section (11) by insertion of the second seal ring (30).

Abstract: To improve sealing performance by a labyrinth to inhibit entry of dust, a sealing device (1) comprising an inner peripheral side sealing member (2) fitted to an inner peripheral side mounting member and an outer peripheral side sealing member (3) fitted to the outer peripheral side mounting member, both relatively rotating, has an outer peripheral tube part (4c) formed on the outer peripheral portion of the metal ring (4) of the inner peripheral side sealing member (2), and a series of long labyrinth spaces (8, 9, 10) is formed between the outer peripheral surface of the outer peripheral tube part (4c) and the outer peripheral side sealing member (3), between the end face of the outer peripheral tube part (4c) and the outer peripheral side sealing member (3), and between the inner peripheral surface of the outer peripheral tube part (4c) and the outer peripheral side sealing member (3).

Abstract: To hold a pulsar ring (1) of a magnetic rotary encoder well concentrically by a pressure inserting jig (4) when the pulsar ring is installed on a rotary body (3), the pulsar ring (1) comprises a metallic annular holder (10) and a pulsar main body (20) of a magnetic rubber material, the holder (10) comprises a disk portion (11) where the pulsar body (20) is bonded, a mounting tube portion (12) having a diameter smaller than the outer diameter of the disk portion (11) and being fixed to the rotary body (3), a fold-back portion (15) folded inward, and an intermediate portion (13) extending therefrom toward the mounting tube portion (12) so as to be separated from the disk portion (11), and the outer circumference of the fold-back portion (15) or a guide portion (22) mounted thereon is fitted to a circumferential wall portion (42) of the jig (4).

Abstract: To easily manufacture an encoder, in which N-poles and S-poles of magnets are arranged alternately in a circumferential direction and in which an unequal pitch portion is provided in a part on a circumference, without using a magnetizing head of a special shape having an unequal pitch portion, the unequal pitch portion is formed by arranging the N-poles and the S-poles at an equal pitch all over the circumference and then providing a part on the circumference with a shielding member for shielding a magnetism. Alternatively, the unequal pitch portion is formed by arranging the N-poles and the S-poles at an equal pitch all over the circumference and then providing a part on the circumference with a cut portion.

Abstract: A pulsar ring for a magnetic encoder comprises an annular holder attached to an outer periphery of a rotary side member, and a pulsar main body made of a rubber-like elastic material mixed with magnetic powder, magnetized to have multiple poles, and adhered integrally to the holder, wherein a plurality of notches are formed at predetermined intervals in a circumferential direction on a peripheral edge of the holder, and the pulsar main body is adhered to the holder so that a peripheral edge of the pulsar main body covers the peripheral edge including the notches of the holder, thereby to improve adhesive strength between the annular holder and pulsar main body.

Abstract: To reduce a space to install a sealing body (10) and the magnetic encoder (11) between relatively movable members (2, 4, a hermetically sealing device comprises a magnetic sensor (60) installed to a stationary side member (3) attached to a housing (2), a magnetic encoder (50) having a holder (51) fixed to a rotating shaft (4) and an encoder main body (56) magnetized in the circumferential direction at a predetermined pitch, connected to a cylindrical portion (52) of the holder (51), and opposed to the magnetic sensor (60), and a sealing body (10) provided with a core metal (20), where a cylindrical portion (22) extending in the axial direction from a flange portion (21) clamped by the housing (2) and the stationary side member (3) is close to the cylindrical portion (52) of the holder (51), and a lip portion (40) sealing the circumferential surface of the rotary shaft (4).

Abstract: A light source apparatus used in a backlight apparatus is disclosed. The light source apparatus includes a light-emitting diode unit and a wiring board. The light-emitting diode unit is provided as one unit by nonlinearly and closely placing respective light-emitting diodes of red, green, and blue colors, at least the light-emitting diode of one color out of the light-emitting diodes of the respective colors being constituted by first and second light-emitting diodes having different chromaticities such that an average chromaticity of the first and second light-emitting diodes is a predetermined chromaticity. On the wiring board, a plurality of light-emitting diode units are arranged at predetermined intervals in a predetermined direction.

Abstract: Herein disclosed are a liquid crystal display device and a data processing device, which can have their frame portions reduced in area to reduce the size and weight by extracting the terminals of video signals to only one side of a liquid crystal display panel and by arranging a video signal line driving circuit substrate to be connected with the terminals, only at one side of the display panel.

Abstract: Herein disclosed are a liquid crystal display device and a data processing device, which can have their frame portions reduced in area to reduce the size and weight by extracting the terminals of video signals to only one side of a liquid crystal display panel and by arranging a video signal line driving circuit substrate to be connected with the terminals, only at one side of the display panel. A liquid crystal display device includes a liquid crystal display panel, a light guide plate, a fluorescent tube, and a lamp reflector. First and second lamp cables of different length are connected to the fluorescent tube.

Abstract: Herein disclosed are a liquid crystal display device and a data processing device, which can have their frame portions reduced in area to reduce the size and weight by extracting the terminals of video signals to only one side of a liquid crystal display panel and by arranging a video signal line driving circuit substrate to be connected with the terminals, only at one side of the display panel. A liquid crystal display device includes a liquid crystal display panel, a light guide plate, a fluorescent tube, and a lamp reflector. First and second lamp cables of different length are connected to the fluorescent tube.