Abstract: A semiconductor optical device includes a semiconductor substrate and a stacked body formed by at least a first cladding layer, an active region and a second cladding layer; wherein both sides of the stacked body are buried by a burying layer formed by a semi-insulating semiconductor crystal; the burying layer includes a first layer that is placed adjacent to both sides of the stacked body and a second layer that is placed adjacent to the first layer; the first layer includes Ru as a dopant; composition of the second layer is different from the composition of the first layer, or a dopant of the second layer is different from the dopant of the first layer. The device can also be configured such that the width of the active region is smaller than the width of the cladding layers of the stacked body; and a Ru-doped semi-insulating layer is provided in a space between the burying layer and the active region in both sides of the active region.

Abstract: An optical semiconductor device includes a first set of lead frames having a first set of element mounting beds, a second set of lead frames having a second set of element mounting beds, which are arranged substantially on a same plane as the first set of element mounting beds. A light-emitting element is mounted on one of the first set of element mounting beds and having a pair of electrodes connected to the first set of lead frames respectively. A light-receiving element is arranged at a position facing to the light-emitting element and having a pair of electrodes connected to the second set of lead frames respectively. A supporting means is mounted on the second set of element mounting beds for supporting the light-receiving element at the position facing to the light-emitting element and for receiving a light emitted from the light-emitting element.

Abstract: A side knock type feeding mechanism for feeding an object to be fed inside a body by side knock is provided. A front barrel which houses an object to be fed and is capable of feeding the object to be fed from a tip end opening, a knock button provided on a side portion of the front barrel so as to project and retract with respect to the front barrel, a rotary member which is inside the front barrel, rotates in a predetermined direction by knock of the knock button as a result that the knock button works, and rotates in an opposite direction by releasing the knock, a piston for feeding out the object to be fed, and a conversion mechanism for converting the rotation of the rotary member into a forward traveling motion of the piston in an axial direction inside the front barrel.

Abstract: An eraser dispenser is provided which can store in a dispenser body an eraser longer than the overall length of the dispenser body. The eraser dispenser enables the eraser to be used without replacement with a new one for a long period of time. The eraser dispenser includes: a dispenser body which is enclosed by an outer circumferential wall having a distal opening and has a storing chamber capable of storing therein an eraser that is longer than the overall length of the dispenser body; and a cover which covers the dispenser body. The eraser dispenser further includes; an external operation member which partially projects from the outer circumferential wall and is operated from the outside of the dispenser body; a driving roller which is operated by the external operating member; a receiving member which is disposed opposite to the driving roller with the eraser held therebetween; and a stopper which prevents a rotary button as the external operation member from undergoing reverse turn.

Abstract: A cartridge type liquid feeding container is capable of being used by refilling or replacing a liquid instead of throwing away the container itself, and can feed out the liquid inside the cartridge. The liquid feeding container includes a body, a manipulating body which is mounted movable with respect to the body and is made capable of being manipulated from an outside, a cartridge which is loaded into the body so as to be attachable and detachable, a liquid supplying body for supplying the liquid inside the tank portion to the outside, a piston rod which is workable on the piston to press the piston of the cartridge forward, and movable inside the cartridge case and body, and a conversion mechanism for converting a manipulating force applied to the manipulating body into forward movement of the piston rod.

Abstract: In a liquid container, the dimension of inside diameter of a liquid supply portion is not subject to any restriction, and also a liquid leakage suppressing mechanism that is not subject to any restriction by the viscosity of stored liquid is provided. A liquid container includes a body having a tank for storing a liquid; a supply mechanism which is connected to the tip end portion of the body and has a brush for supplying the liquid; and a drive mechanism for pushing out the liquid L in the tank T to the supply mechanism. A valve which is normally closed and can be opened only when the drive mechanism is operated is provided between the tank and the supply mechanism.

Abstract: A mechanical pencil includes a barrel, a lead feeding mechanism disposed in the barrel to tighten and feed a lead, and a lead holder disposed between the lead feeding mechanism and a tip end of the barrel. The lead holder includes a through hole through which the lead penetrates, holding portions for holding the lead, and a contact portion for contacting an inner peripheral face of the barrel. The holding portions include a first holding portion at a front portion of the lead holder and a second holding portion at a rear portion of the lead holder. When a length of the lead becomes shorter than a distance between the lead feeding mechanism and the tip end of the barrel, the first holding portion holds the short lead and the second holding portion holds a next lead tightened by the lead feeding mechanism.

Abstract: A rotary bar-projecting mechanism for a push-button implement comprises: a first bar held axially slidably in a barrel, an operating means capable of making the first bar project from the front end of the barrel when pushed, a tail cap fixed to the barrel and internally provided with a counter rib, a push button capable of being turned relative to the tail cap and provided with a push rib that is aligned with the counter rib of the tail cap when the push button is at a predetermined angular position, and a second bar held in the push button, capable of being projected from the back end of the push button when the push button is turned, and restrained from turning.

Abstract: A capless holding device which does not use any removable caps but which can reliably move a medium between a projected position and a housed position is provided. The capless holding device includes a cylinder holding a refill that is movable between a projected position and a housed position. The cylinder includes a tip opening out of which a pen tip of the refill located at the projected position is projected and a housing section that seals the pen tip of the refill located at the housed position. A rotating cylinder is connected to the axial cylinder so as to relatively rotatively movable, an engaging projection integrally provided on the refill, a cam groove formed in the rotating cylinder to guide the engaging projection forward and backward in unison with rotation of the rotating cylinder, and a guide groove formed in the axial cylinder to guide the engaging projection in a rotating direction.

Abstract: A stick projecting device has a barrel as a case body comprising a front barrel and a rear barrel both of which are configured rotatably with regard to each other. A piston rod oval in section, having uncontinuous male thread portions is slidably fitted in the barrel. A driver having a female thread portion in mesh with the male thread portions is provided in the front barrel. A locking member that prevents the piston rod from turning is secured to the front barrel at a position forwardly of the driver. An inner cylinder is movably provided in the front barrel and the tip of the inner cylinder is able to be in abutment with a part of the front interior of the front barrel. A part of a stick that has been projected from the opening of the tip of the front barrel can be restored in the front barrel by a reverse turning operation of the rear barrel.

Abstract: The present invention provides a capless holding device which does not use any removable caps but which can reliably move a medium between a projected position and a housed position. The capless holding device includes a cylinder holding a refill that is movable between a projected position and a housed position. The cylinder includes a tip opening out of which a pen tip of the refill located at the projected position is projected and a housing section that seals the pen tip of the refill located at the housed position. A rotating cylinder is connected to the axial cylinder so as to relatively rotatively movable, an engaging projection integrally provided on the refill, a cam groove formed in the rotating cylinder to guide the engaging projection forward and backward in unison with rotation of the rotating cylinder, and a guide groove formed in the axial cylinder to guide the engaging projection in a rotating direction.

Abstract: A rotary bar-projecting mechanism for a push-button implement comprises: a first bar held axially slidably in a barrel, an operating means capable of making the first bar project from the front end of the barrel when pushed, a tail cap fixed to the barrel and internally provided with a counter rib, a push button capable of being turned relative to the tail cap and provided with a push rib that is aligned with the counter rib of the tail cap when the push button is at a predetermined angular position, and a second bar held in the push button, capable of being projected from the back end of the push button when the push button is turned, and restrained from turning.

Abstract: In a liquid container, it is made possible to store liquid that is overflowed by fluctuations in atmospheric pressure and thereby to prevent liquid leaks, and the whole quantity of the stored liquid is enabled to be used. The liquid container is provided with a body having a main tank in which liquid is stored; a supply outlet, located toward the tip of the body, for supplying the liquid; a guiding portion connecting the main tank and the supply outlet to guide the liquid from the main tank to the supply outlet; and a liquid reservoir having an air flow port communicating with the exterior and a liquid flow port communicating with the main tank or the guiding portion and an overflowing liquid flow path for storing liquid overflowing the main tank. The liquid is stored farther away from the supply outlet than the liquid flow port.

Abstract: A semiconductor optical device includes a semiconductor substrate and a stacked body formed by at least a first cladding layer, an active region and a second cladding layer; wherein both sides of the stacked body are buried by a burying layer formed by a semi-insulating semiconductor crystal; the burying layer includes a first layer that is placed adjacent to both sides of the stacked body and a second layer that is placed adjacent to the first layer; the first layer includes Ru as a dopant; composition of the second layer is different from the composition of the first layer, or a dopant of the second layer is different from the dopant of the first layer. The device can also be configured such that the width of the active region is smaller than the width of the cladding layers of the stacked body; and a Ru-doped semi-insulating layer is provided in a space between the burying layer and the active region in both sides of the active region.

Abstract: A composite writing implement is capable of being used as a ball-point pen, a mechanical pencil or a stylus pen. The composite writing implement includes a barrel, a pencil lead feeder unit axially slidably placed in a front part of the barrel, a ballpoint refill unit disposed behind and coaxially with the pencil lead feeder unit in a back part of the barrel and including a ballpoint refill case and a ballpoint refill fixedly held in the ballpoint refill case, a rotary cam operatively connecting the ballpoint refill case and the pencil lead feeder unit, and a cap put on the ballpoint refill case so as to cover the ballpoint tip of the ballpoint refill, provided with a stylus tip, capable of being used as a stylus and means for turning the rotary cam through the ballpoint refill case to make the pencil lead feeder feed a lead.

Abstract: A semiconductor optical device includes a semiconductor substrate and a stacked body formed by at least a first cladding layer, an active region and a second cladding layer; wherein both sides of the stacked body are buried by a burying layer formed by a semi-insulating semiconductor crystal; the burying layer includes a first layer that is placed adjacent to both sides of the stacked body and a second layer that is placed adjacent to the first layer; the first layer includes Ru as a dopant; composition of the second layer is different from the composition of the first layer, or a dopant of the second layer is different from the dopant of the first layer. The device can also be configured such that the width of the active region is smaller than the width of the cladding layers of the stacked body; and a Ru-doped semi-insulating layer is provided in a space between the burying layer and the active region in both sides of the active region.

Abstract: A knock-type liquid container includes a body having a tank that holds a liquid, and an outlet provided at a forward end, a piston in the tank, and a piston-advancing mechanism having a knocking body that projects rearwardly of the body for advancing the piston forwardly when the knocking body is knocked in an axial direction of the container. A rearward end surface of the rear cap that forms a rear end surface of the container, except the knocking body is not normal to the axial direction, but makes an angle other than an approximate right angle with the axial direction. A distance between a rear end surface of the knocking body at a non-knocking position and a rearmost portion of the rearward end surface of the container, except the knocking body, is less than a stroke of the knocking body required for advancing the piston.

Abstract: In a liquid container, the dimension of inside diameter of a liquid supply portion is not subject to any restriction, and also a liquid leakage suppressing mechanism that is not subject to any restriction by the viscosity of stored liquid is provided. A liquid container includes a body having a tank for storing a liquid; a supply mechanism which is connected to the tip end portion of the body and has a brush for supplying the liquid; and a drive mechanism for pushing out the liquid L in the tank T to the supply mechanism. A valve which is normally closed and can be opened only when the drive mechanism is operated is provided between the tank and the supply mechanism.

Abstract: It is a clip attaching structure wherein the cost can be reduced, and the appearance is excellent, and furthermore, the spring action is good. The clip is made of a thin plate metal material, and has a base part to be inserted into an outer sleeve and a main body part to be extended outside the outer sleeve, and the main body part has an approximately U-shaped cross section made by bending downward both sides of the thin plate, and between the base part and the main body part, a closing part for closing the rear end opening of the inner sleeve is provided. The main body part side of the closing part has an approximately U-shaped cross section made by downward bending both sides thereof and the approximately U-shaped cross section from the main body part is continued, and the base part side of the closing part is shaped like a plate, and the downward bent portion of both sides of the closing part is inserted into the inner sleeve when the clip is not swung.

Abstract: A composite writing implement is capable of being used as a ball-point pen, a mechanical pencil or a stylus pen. The composite writing implement includes a barrel, a pencil lead feeder unit axially slidably placed in a front part of the barrel, a ballpoint refill unit disposed behind and coaxially with the pencil lead feeder unit in a back part of the barrel and including a ballpoint refill case and a ballpoint refill fixedly held in the ballpoint refill case, a rotary cam operatively connecting the ballpoint refill case and the pencil lead feeder unit, and a cap put on the ballpoint refill case so as to cover the ballpoint tip of the ballpoint refill, provided with a stylus tip, capable of being used as a stylus and means for turning the rotary cam through the ballpoint refill case to make the pencil lead feeder feed a lead.