摘要:
A headrest for a vehicle seat has a tubular stay to be attached to a seatback and a connector to be connected to an end of the stay. The stay includes a shaft hole, an attachment hole, and a notched surface. The attachment hole penetrates from an outer surface of the stay to the shaft hole in the radial direction. The notched surface is circumferentially adjacent to the attachment hole and is substantially orthogonal to the attachment hole. The connector includes a cantilevered locking strip to be inserted into the shaft hole while being resiliently deformed. The locking strip includes a projection. The projection fits in the attachment hole by being resiliently restored. And the projection includes an extending portion being wider than the circumferential width of the attaching hole and extending over the notched surface by being resiliently restored.
摘要:
A headrest for a vehicle seat has a base member attached to a seatback of the vehicle seat, a body frame attached to the base member so as to be capable of tilting, a locking device for locking the body frame with the base member so as not to be capable of tilting, and an unlocking device for unlocking the locking device. The unlocking device includes a swinging body attached to the base member so as to be capable of swinging and a moving body attached to the body frame so as to be capable of moving with respect thereto. The moving body moves with respect to the body frame by being pushed by the swinging body to unlock the locking device. The swinging body has a connecting portion to which one end of a cable is connected and an arcuate-shaped outer peripheral surface on which the cable is disposed. And the cable is retracted into a tubular portion provided on the base member from an entrance of the tubular portion when the cable is pulled to unlock the locking device. The entrance of the tubular portion is located substantially on a tangent line of the arc of the outer peripheral surface.
摘要:
An electroluminescence element (EL) obtained by using a silacyclopentadiene derivation expressed by the general formula (I) and the derivative are provided. ##STR1## (wherein X and Y are independently hydrocarbon radicals with from 1 to 6 atoms and R.sub.1 to R.sub.4 are hydrogen, halogens, alkyl radicals with from 1 to 6 carbon atoms, or a condensed (un)substituted ring if being adjacent).
摘要:
To safety and quickly exchange a seal of a shock strut of a selected shock absorbing apparatus of an airplane, the main body of the airplane is lifted by pressurizing and extending at least one other shock absorbing apparatus in order to extend the selected shock absorbing apparatus and expose the seal thereof. A shock strut of the selected shock absorbing apparatus is then lifted away from the associated wheels so that a new seal may be inserted from below the strut.
摘要:
A ferroelectic smectic C liquid crystal mixture and a display element having a quick electrooptical response and a good memory property are provided, the ferroelectric mixture having a Ps of 60 nC/cm2 or more and a tilt angle of 24.degree. or more and comprising(A) a first component comprising at least one optically active compound expressed by the formula ##STR1## wherein l and m are 0 or 1, both are not 1; n is an integer of 3 to 8; X and Y are H, F, Cl, or CN, both X and Y are not H; A is --COO-- or --OCO--; and R is C3--8 alkyl or alkoxy , and(B) a second component comprising at least one optically active compound expressed by the formula ##STR2## wherein l, m, n and R are as defined above; and A is --COO--, --OCO--, --CH.sub.2 O-- or --OCH.sub.2 --, a total content of the first and second components being 60 mol % or more in the mixture.
摘要:
The present invention is directed to a ferroelectric liquid crystal composition having quick response properties and assuming a smectic C* phase in an extensive temperature range inclusive of room temperature, and an optical switching element having a quick response property containing this composition.The ferroelectric liquid crystal composition is here disclosed which comprises at least one chiral compound (liquid crystal component A) having an optical activity site represented by the formula (A) ##STR1## wherein R.sup.1 is a straight-chain or branched alkyl group having 2 to 18 carbon atoms or a straight-chain or branched alkoxy group having 1 to 18 carbon atoms, and * indicates an asymmetric carbon atom,and at least one non-chiral compound (liquid crystal component B) having a smectic C phase (hereinafter referred to as "S.sub.C phase"; which shall apply in the following), an S.sub.I phase, an S.sub.F phase, an S.sub.G phase, an S.sub.H phase, an S.sub.J phase or an S.sub.K phase.
摘要:
A ferroelectric liquid crystal composition having a long helical pitch and a light switching element having a quick response property are provided. This composition comprises (1) at least one member selected from the group consisting of liquid crystal compounds having a smectic C phase and no helical structure and liquid crystal compounds having only a nematic phase as a liquid crystal phase and no helical structure and (2) at least one chiral smectic liquid crystal compound.
摘要:
A ferroelectric liquid crystal composition exhibiting SC* phase within a broad temperature range including room temperature and also having high-speed response properties and a light switching element using the above-mentioned liquid crystal composition and exhibiting high-speed response properties are provided, which composition comprises at least one member of chiral compounds expressed by the formula ##STR1## wherein R.sup.1 and R.sup.2 each represent a linear or branched chain alkyl, alkoxy, alkoxyalkoxy, alkoxycarbonyl, alkanoyl or alkanoyloxy group each of 1 to 18 C and at least one of R.sup.1 and R.sup.2 has an asymmetric carbon atom in the alkyl chain moiety of these groups, and at least one member of chiral compounds having a spontaneous polarization value of 40 nC/cm.sup.2 or more.
摘要:
The present invention provides diamino compounds and liquid crystal aligning films comprising polyimides which are obtained from the said diamino compounds represented by the general formula: ##STR1## wherein R.sub.1 indicates an alkyl group having 3 to 22 carbon atoms, R.sub.2 indicates a hydrogen atom or an alkyl group having 1 to 22 carbon atoms, and R.sub.3 -R.sub.10 indicate a hydrogen atom or a methyl group, respectively.The liquid crystal aligning films are useful for STN mode display cells in realizing a high pretilt angle.
摘要:
A ferroelectric liquid crystal composition having a long helical pitch and a light switching element having a quick response property are provided. This composition comprises (1) at least one member selected from the group consisting of liquid crystal compounds having a smectic C phase and no helical structure and liquid crystal compounds having only a nematic phase as a liquid crystal phase and no helical structure and (2) at least one chiral smectic liquid crystal compounds.