摘要:
An attachment/detachment mechanism for an antenna is configured to avoid damage to the antenna when an excessively large force is applied to the antenna, regardless of the direction. A rotational L-shaped connector of an antenna section of the antenna is connected to an antenna housing disposed on a main electronic device unit. A fitting groove is formed on a male fitting cylinder on the rotational L-shaped connector side, and an O-ring is fitted to the groove. An engagement projection formed on an inner wall of a female fitting cylinder on the antenna housing frictionally engages with the O-ring. This configuration allows rotation and attachment/detachment of the antenna section relative to the antenna housing. A contact member is attached to the fitting cylinder to contact a contact spring 31 that presses the O-ring against the engagement projection.
摘要:
The present invention is for providing an antenna device in a portable radio, capable of transmitting and receiving in frequency bands used in two different communication systems without the performance irregularity even in the case of the mass production. By having the inductance per unit length along the elongating direction of the upper antenna element larger than that of the lower antenna element, the entire antenna element is resonated at a first frequency f1 as a quarter wave ground antenna element and is also resonated at a second frequency f2 lower than the frequency three times as much as the first frequency f1 as a three quarter wave ground antenna. Since the antenna element is formed with an antenna pattern printed on a printed wiring board, antenna elements with the same shape can be obtained, and thus the antenna performance irregularity cannot be generated even in the case of the mass production.
摘要:
The invention is directed to an antenna assembly which, when a rod antenna unit is retracted in the radio housing, permits transmission and reception with no influence thereon by the retracted rod antenna unit and which resonates with two frequencies when the rod antenna unit is in its extended position. Feeding metal pipe (9) connected to a secondary antenna (14) formed by a helical antenna element has contact springs (18) for elastic contact with a rod antenna unit (2). When the rod antenna unit (2) is retracted position, the contact springs (18) contact an insulating cover (11) wrapped around the rod antenna unit (2), electrically disconnecting a primary antenna (20) from the feeding metal pipe (9). Hence, only the secondary antenna (14) serves as an antenna without being affected by the primary antenna (20). When the rod antenna unit (2) is in its extended position, the contact springs (18) make electrical contact with a connector terminal (22) electrically connected to the primary antenna (20), thus connecting the primary antenna (20) and the secondary antenna (14) to the feeding hardware (9).
摘要:
A stripper holder for holding a stripper plate conforms with the deformation of a die plate. A pressing force applied to the stripper plate and is greater than an elastic limit of a metal tape to be punched, and less than a pressing deformation or breakage force of the metal tape. The stripper holder may also be flexible, or such that the metal tape is pressed at two different positions for one punching position by two different pressing forces.
摘要:
A method for cutting hair which realizes a hairstyle to give a light appearance of movability and vividness by giving natural irregularities to length of the hair. Three different reference lengths are used for one hairstyle. A founding portion of hair is cut by using a shortest reference length, hair of a vector portion is cut by using a middle reference length, and hair of an outer portion that forms an appearance of the hairstyle is cut by using a longest reference length.
摘要:
A device for coupling pipelines for running cryogenic liquid has: a pair of flanges which are pierced by coupling units respectively and which support the coupling units with the coupling units freely approaching and separating from each other and which form compartments around the coupling units; a pair of inner cover units which open and shut the insides of the coupling units; a pair of outer cover units which open and shut the insides of the compartments of the flanges; and purge lines for purging the insides of the compartments. The process of coupling pipelines by this device has the steps of: opening the outer cover units with the insides of the coupling units shut by the inner cover units; coupling the flanges to each other; purging the inside of a compartment which is formed in the flanges; opening the inner cover units; and coupling the coupling units to each other with the coupling units isolated from the outside air. It can be possible to promptly perform the separation and the coupling of the pipelines with high purity kept. Moreover, the reduction of the cost of the separation and the coupling can be accomplished because the quantity of flushing fluid can be reduced greatly.
摘要:
A rubber composition comprising a rubber containing a polymer of ethylene-propylene copolymer or ethylene-propylene-diene terpolymer, polybutene and an inorganic filler has an excellent puncture-sealing property. Tubeless tires provided with the rubber composition have a high resistance against the puncture.
摘要:
An attachment/detachment mechanism for an antenna is configured to avoid damage to the antenna when an excessively large force is applied to the antenna, regardless of the direction. A rotational L-shaped connector of an antenna section of the antenna is connected to an antenna housing disposed on a main electronic device unit. A fitting groove is formed on a male fitting cylinder on the rotational L-shaped connector side, and an O-ring is fitted to the groove. An engagement projection formed on an inner wall of a female fitting cylinder on the antenna housing frictionally engages with the O-ring. This configuration allows rotation and attachment/detachment of the antenna section relative to the antenna housing. A contact member is attached to the fitting cylinder to contact a contact spring 31 that presses the O-ring against the engagement projection.
摘要:
A method of providing fabrication-historic data for a semiconductor device to a chip, has the step of: preparing a wafer with a pattern of a plurality of chips, where each chip has a product area to function as a semiconductor device and a fabrication-historical data area on which fabrication-historical data is to be held, wherein different fabrication-historical data is provided for each chip by exposing all of the chips on the wafer as a single unit by means of an exposure system using a mater mask while the product area of each chip is shielded from exposure or in one of the steps of forming the contact holes and carrying out wiring among the transistors. Consequently, the process can be easily performed because of the exposure in one operation using the master mask and thus the fabrication-historical data can be easily mounted on the chip.
摘要:
First and second helical antenna elements are connected in series with a radio signal. The first helical antenna element resonates at a first frequency as a ¼-wavelength antenna. The series combination of the first and second helical antenna elements resonates as a ¾ wavelength antenna at a second frequency respectively. The two frequencies differ by less than a factor of three. A retractable rod antenna shorts out one of the antenna elements in an extended position at which it is connected to the radio, and is disconnected from the radio in its retracted position. The rod antenna resonates as a ¼-wavelength antenna at the first frequency.