摘要:
A solenoid assembly comprising a magnetic plunger, an electric coil for generating a magnetic flux in a direction along an axis of the magnetic plunger, a main yoke composed of at least two separate members for defining a magnetic flux passage around the electric coil, and a pair of yoke end members held in engagement respectively with opposite ends of the main yoke, an outer casing. The yoke end members have recesses extending substantially normally to the axis of the magnetic plunger, and the main yoke has projections fitted respectively in the recesses to maintain the main yoke and the yoke end members in engaging relationship. The outer casing has an inner wall keeping the main yoke held in engagement with the yoke end members. A leaf spring acts on the main yoke to hold the latter securely in place in the outer casing. The yoke end members have cylindrical projections supporting thereon the electric coil between the projections of the main yoke. Magnetic cores are firmly held against a permanent magnet by resilient members fitted in slots defined in outer peripheral surface of a plunger shaft.
摘要:
A solenoid valve assembly having two bobbins including the solenoids which are co-axially supported by a housing first and second valve bodies slidably supported in each axial bore of the two bobbins and movable independently with respect to energized conditions of the solenoids, an outlet port formed in the housing to receive control pressure from two different pressure sources applied to two inlet ports formed in the housing, a first, second, third and fourth valve core positioned within the housing, a single sleeve of non-magnetic material secured to the valve cores such that the valve cores are positioned within axial bores of the bobbins, passageways for communicating with the outlet and two inlet ports formed in the sleeve and valve cores, the first valve body being of a magnetic material which is axially movable and supported in the sleeve between the first valve core and the second valve core, the second valve body including magnetic material axially movable and supported in the sleeve between the third valve core and the fourth valve core and a member for biasing the valve bodies, respectively, in an axial direction.
摘要:
In an electromagnetically operated valve unit, a stationary core and a spring loaded moving-core are coaxially arranged within an axial bore extending across a lateral plate member of magnetic material, and a U-shaped yoke member of magnetic material has a head portion engaged with the stationary core and a pair of longitudinal arms which are supported by the opposite ends of the lateral plate member and fastened to a bracket. The lateral plate member is formed at its opposite ends with a pair of arms which are engaged with each outer face of the respective arms of the yoke member to uniform a magnetic path of the solenoid coil across the cores, the lateral plate member and the yoke member.
摘要:
A solenoid device adapted for use with an automobile door locking device, for example, comprises a shaft, two magnetic cores, a permanent magnet sandwiched between the cores, two field coils for producing a magnetic flux along the shaft, a magnetic yoke body for forming a magnetic flux path along the outsides of the coils, a magnetic center plate disposed between the coils, and two magnetic yoke end plates. The permanent magnet and the cores are fixed to the shaft to form a magnetic plunger. The center plate includes an annular magnetic flux path portion through which the magnetic plunger extends. The width A of the annular magnetic path portion in the direction of the axis of the shaft, the distance B between the end surfaces of the magnetic flux path portion and the respective end surfaces of the yoke end plates, the thickness C of the permanent magnet in the direction of polarization, and the length D of the magnetic cores in the direction of the axis of the shaft are so selected as to satisfy the following relations:A>C and D.gtoreq.B.
摘要:
A temperature sensing valve includes a casing having an internal fluid passage member formed therein, a permanent magnet mounted in the casing, a valve body which includes a magnetically soft, amorphous metal member supported in a thermally sensitive region of the casing for movement between a first and second position and being magnetically coupled to the permanent magnet so that flow through the fluid passage member can be interrupted in response to magnetic excitement by the permanent magnet of the valve body, and a spring for urging the valve body in a first direction to permit fluid flow through the fluid passage member wherein when the temperature of the second thermally sensitive region is below the Curie point of the second valve body, the valve body is excited by the permanent magnet to maintain the fluid passage member closed against the biasing force of the spring whereas when the temperature of the thermally sensitive region reaches the Curie point of the valve body, the valve body constitutes a paramagnetic body and is no longer excited by the permanent magnet so as to be displaced by the biasing force of the spring to the second position for flow of the fluid through the fluid passage member.
摘要:
A temperature switch includes a housing, a fixed contact positioned in the housing, a movable contact member mounted in the housing carrying a movable contact and urged to first and second positions where the movable contact is in abutment with or displacement from the fixed contact, respectively, a permanent magnet mounted in the housing, a thermally sensitive member mounted in the housing so as to be exposed to a region the temperature of which is to be determined wherein the thermally sensitive member includes a magnetically soft, amorphous metal member and is magnetically coupled to the permanent magnet, and an operating member which includes magnetic material wherein a first end thereof engages the movable contact member and a second end thereof opposite the first end is attracted to the thermally sensitive member against the resilience of the movable contact member, thereby causing displacement of the movable contact to the second position and wherein the thermally sensitive member includes a paramagnetic body upon the temperature of the region exceeding the Curie point thereof so as to displace the movable contact to the first position.
摘要:
A reference voltage generating circuit that generates a reference voltage includes: a first pn junction that generates a first voltage; a second pn junction that has a different current density from the first pn junction; a first resistor that generates a first current having a positive temperature coefficient based on a voltage equivalent to a difference between a forward voltage of the first pn junction and a forward voltage of the second pn junction; a second resistor that generates a first voltage having a positive temperature coefficient based on the first current, wherein the first voltage having the positive temperature coefficient and a voltage having a negative temperature coefficient are added to generate the reference voltage; and a third resistor that generates a temperature-dependent voltage based on the first current having the positive temperature coefficient, wherein the reference voltage and the temperature-dependent voltage are outputted in parallel from first and second output nodes, respectively, and a resistance value of the first resistor and a resistance value of the third resistor are adjusted in the same proportion by a trimming signal.
摘要:
An A/D conversion circuit in which a control circuit that has a successive approximation register storing data updated by a successive approximation operation generates correction data for correcting non-linearity between an input analog signal and an output digital signal, and a comparison unit corrects the non-linearity based on the correction data. An A/D conversion circuit includes a comparison unit which performs comparison operation in successive approximation and a control circuit having a successive approximation register storing successive approximation data updated by the successive approximation. The control circuit outputs correction data for correcting non-linearity between an input signal and output data of the A/D conversion circuit to the comparison unit based on one or plural bits of the successive approximation data. The comparison unit corrects the non-linearity of the A/D conversion circuit based on the correction data.
摘要:
A headrest 5 includes a base portion 5a and a movable portion 5b, which is movable relative to the base portion 5a. The movable portion 5b is moved and driven by a drive unit 8a between a retracted position 5X proximate to the base portion 5a and an extended position 5Y distant from the base portion 5a. A control unit 7 controls the drive unit 8a to move the movable portion 5b toward the extended position 5Y when determining that a vehicle occupant seated on the seat 3 caused movement of the load applied to a seating surface 3a of the seat 3.
摘要:
As sensor means for sensing an operation input of a user, a switch device X comprises a first electrode 11 that is an elastic plate member, and a second electrode 12 that is opposed to the first electrode 11. The first electrode 11 is provided so as to be switchable between a first stable posture in which the first electrode is biased to a switch input cancellation position and a second stable posture in which the first electrode is biased to a switch input position. An operation member 17 is provided for applying an operation force to the first electrode 11, thereby returning the posture thereof from the second stable posture to the first stable posture after the posture has been changed from the first stable posture to the second stable posture.