Abstract: Structures with racket performance varied according to the configurations of cylindrical parts can be easily used. A grommet (25-28) includes a cylindrical part (32) which is mounted pierced through a through hole (23) formed in a frame (20) of a racket (10) and through which a string (21) passes. The string is extended in a tensioned state on the frame so as to form front and back faces as hitting faces (22). The cylindrical part includes a first formation section (35) forming both sides of a central axis position (C) of the cylindrical part and a second formation section (36) rotationally shifted with reference to the central axis position by 90 degrees relative to the first formation section and forming both sides of the central axis position. One of the first and second formation sections is disposed on both sides in a front/back direction. The first and second formation sections each have a different rigidity.

Abstract: A racket includes: a grip; an annular frame; and a shaft coupling the grip and the frame together; wherein a projection is provided to an outer peripheral face on a leading end half of the frame in a predetermined range including a location of maximum curvature in a peripheral direction.

Abstract: A terminal unit assembly in which a plurality of terminal units extending in a longitudinal direction are arranged in a lateral direction orthogonal to the longitudinal direction, and a frame member including an assembly accommodating recess for accommodating the terminal unit assembly; wherein the terminal unit includes a longitudinally extending terminal holding part, a main body held by the terminal holding part, a plurality of terminals including contact parts protruding above the top face or below the bottom face of the terminal unit and contact arms connecting the main body to the contact parts, and a housing wall extending in the longitudinal direction; and the terminal holding part includes a plurality of laterally protruding protrusions, and at least one of the protrusions abuts against a housing wall of an adjacent terminal unit.

Abstract: A terminal unit assembly in which a plurality of terminal units extending in a longitudinal direction are arranged in a lateral direction orthogonal to the longitudinal direction, and a frame member including an assembly accommodating recess for accommodating the terminal unit assembly; wherein the terminal unit includes a longitudinally extending terminal holding part, a main body held by the terminal holding part, a plurality of terminals including contact parts protruding above the top face or below the bottom face of the terminal unit and contact arms connecting the main body to the contact parts, and a housing wall extending in the longitudinal direction; and the terminal holding part includes a plurality of laterally protruding protrusions, and at least one of the protrusions abuts against a housing wall of an adjacent terminal unit.

Abstract: To enhance a resilience performance of a ball at hitting the ball, a grommet is configured to include a strip-shaped portion extending in a predetermined direction and a cylindrical portion projecting from one surface of the strip-shaped portion, the cylindrical portion being a portion through which a string passes. A bulge portion is formed on a part on another surface of the strip-shaped portion, the part being along an inner periphery of the cylindrical portion. The bulge portion has a shape bulged more than the other surface of the strip-shaped portion, and the string is folded back at the bulge portion. A plurality of the protrusions are formed between the cylindrical portions adjacent to one another, the plurality of the protrusions being portions to which the string contacts.

Abstract: The socket of the present disclosure includes: a terminal unit assembly with a plurality of terminal units, each extending in a longitudinal direction, arranged along a lateral direction orthogonal to the longitudinal direction; and a frame member including an assembly accommodating recess that accommodates the terminal unit assembly. The terminal units each include: a terminal holding part extending in the longitudinal direction; a plurality of terminals; and a side wall. The plurality of terminals each includes a body held by the terminal holding part, a contact part protruding upward beyond an upper surface the terminal unit or protruding downward beyond a lower surface of the terminal unit, and a contact arm connecting the body and the contact part; and the side wall extends in the longitudinal direction, includes a plurality of abutting parts capable of abutting the contact arm, and is arranged adjacent to the terminal holding part in the lateral direction.

Abstract: A racket includes: a grip; an annular frame; and a shaft coupling the grip and the frame together; wherein a projection is provided to an outer peripheral face on a leading end half of the frame in a predetermined range including a location of maximum curvature in a peripheral direction.

Abstract: The socket of the present disclosure includes: a terminal unit assembly with a plurality of terminal units, each extending in a longitudinal direction, arranged along a lateral direction orthogonal to the longitudinal direction; and a frame member including an assembly accommodating recess that accommodates the terminal unit assembly. The terminal units each include: a terminal holding part extending in the longitudinal direction; a plurality of terminals; and a side wall. The plurality of terminals each includes a body held by the terminal holding part, a contact part protruding upward beyond an upper surface the terminal unit or protruding downward beyond a lower surface of the terminal unit, and a contact arm connecting the body and the contact part; and the side wall extends in the longitudinal direction, includes a plurality of abutting parts capable of abutting the contact arm, and is arranged adjacent to the terminal holding part in the lateral direction.

Abstract: To enhance a resilience performance of a ball at hitting the ball, a grommet is configured to include a strip-shaped portion extending in a predetermined direction and a cylindrical portion projecting from one surface of the strip-shaped portion, the cylindrical portion being a portion through which a string passes. A bulge portion is formed on a part on another surface of the strip-shaped portion, the part being along an inner periphery of the cylindrical portion. The bulge portion has a shape bulged more than the other surface of the strip-shaped portion, and the string is folded back at the bulge portion. A plurality of the protrusions are formed between the cylindrical portions adjacent to one another, the plurality of the protrusions being portions to which the string contacts.

Abstract: The present invention provides an oral vaccine against a bacterial infectious disease (e.g., typhoid fever, cholera, or dysentery). The oral vaccine of the present invention is a capsule formulation in which a transformed microorganism that expresses a flagellin antigen protein or that secretes a flagellin antigen protein out of the cell of the microorganism is encapsulated with an acid-resistant membrane. Examples of the microorganism include intestinal bacteria belonging to the genus Bifidobacterium, the genus Lactobacillus, the genus Lactococcus, and the like. The form of the capsule formulation may be any one of a seamless capsule formulation, a soft capsule formulation, and a hard capsule formulation.

Abstract: The present invention provides an oral vaccine against a bacterial infectious disease (e.g., typhoid fever, cholera, or dysentery). The oral vaccine of the present invention is a capsule formulation in which a transformed microorganism that expresses a flagellin antigen protein or that secretes a flagellin antigen protein out of the cell of the microorganism is encapsulated with an acid-resistant membrane. Examples of the microorganism include intestinal bacteria belonging to the genus Bifidobacterium, the genus Lactobacillus, the genus Lactococcus, and the like. The form of the capsule formulation may be any one of a seamless capsule formulation, a soft capsule formulation, and a hard capsule formulation.

Abstract: In a diffraction type optical pickup lens, at least one surface of a convergent lens is formed with such an aspheric surface that a luminous flux having a wavelength ?1 is converged at a first predetermined position. At least one surface of the convergent lens is formed with a zone plate having such a wavelength selectivity that a luminous flux having a wavelength ?2 is converged at a second predetermined position whereas the luminous flux having a wavelength ?1 is transmitted therethrough as it is. The convergent lens is transparent to the luminous fluxes having the wavelengths ?1 and ?2.

Abstract: One surface of an objective lens is provided with a zonal part which acts such that the quantity of light having a wavelength of &lgr;1 is apparently canceled in the outer peripheral portion of the luminous flux due to an interference effect, whereas the quantity of light having a wavelength of &lgr;2 in the outer peripheral part is kept as it is. The zonal part has such a step that light supposed to pass a position corresponding to the zonal part if the zonal part does not exist and light passing a position at which the zonal part is formed if the zonal part exists generate therebetween a phase difference satisfying a predetermined conditional expression. The numerical aperture at a boundary position of the step has a value between two numerical apertures for the respective wavelengths &lgr;1 and &lgr;2.

Abstract: In a diffraction type optical pickup lens, at least one surface of a convergent lens is formed with such an aspheric surface that a luminous flux having a wavelength &lgr;1 is converged at a first predetermined position. At least one surface of the convergent lens is formed with a zone plate having such a wavelength selectivity that a luminous flux having a wavelength &lgr;2 is converged at a second predetermined position whereas the luminous flux having a wavelength &lgr;1 is transmitted therethrough as it is. The convergent lens is transparent to the luminous fluxes having the wavelengths &lgr;1 and &lgr;2.

Abstract: One surface of an objective lens is provided with a zonal part which acts such that the quantity of light having a wavelength of &lgr;1 is apparently canceled in the outer peripheral portion of the luminous flux due to an interference effect, whereas the quantity of light having a wavelength of &lgr;2 in the outer peripheral part is kept as it is. The zonal part has such a step that light supposed to pass a position corresponding to the zonal part if the zonal part does not exist and light passing a position at which the zonal part is formed if the zonal part exists generate therebetween a phase difference satisfying a predetermined conditional expression. The numerical aperture at a boundary position of the step has a value between two numerical apertures for the respective wavelengths &lgr;1 and &lgr;2.

Abstract: A luminous flux diameter variable type objective lens having a wavelength selectivity is disposed within a luminous flux. Arranged on a surface of the lens are a first region 11 with no diffraction gratings, and a second region 12 with diffraction gratings. The diffraction gratings each having a rectangular cross section are linearly arranged in the second region 12. The thickness (height) h of the diffraction grating 12A is set to such a value that the ratio of ± first-order diffracted light becomes much greater for the light having a wavelength of 780 nm used for CD-R, whereas the ratio of zero-order diffracted light becomes substantially 100% for the light having a wavelength of 635 nm used for DVD.