Mitsubishi Pencil Kabushiki Kaisha

Japan Aviation Electronics Industry, Limited

Mitsubishi Pencil Company, Limited

Yasuhiro Koike

Koike, Yasuhiro

Hiroyuki Muto

Kazuhiko Furukawa

Hitoshi Suzuki

Toshitaka Torikai

Takayoshi Yamauchi

Naohiko Moriya

Atsushi Nakajima

Akihito Mitsui

Toru Kitao

Mitsuhiro Ohashi

In order to fix an optical fiber to a desired position in a holding member easily and tightly, provided is an optical collimator () having a plastic optical fiber () and a cylindrical holder (). The holder () is configured to hold a collimator lens () at an end and has an insertion hole () at an opposite end for inserting the plastic optical fiber (). The plastic optical fiber () is sandwiched by an inner surface of a recess () which is formed at a part of the holder () in proper alignment with the collimator lens ().

Optical collimator and optical connector using same

There is provided a ballpoint pen tip in which a shoulder of a bent portion does not touch a paper surface during writing and bleeding caused by deformation of an inner periphery of the bent portion can be prevented, and an ink refill using thereof. The ballpoint pen tipcomprises a first tapered surfaceformed by tapering an outer periphery at a front end of a holdera connecting surfacethat is formed at a front end side of the first tapered surfaceand has an outside angle larger than 180&#xb0; with respect to the first tapered surface, a second tapered surfacethat is formed at a front end side of the connecting surfaceand has an outside angle smaller than 180&#xb0; with respect to the connecting surface, and a bent portionin which a front end portion of the second tapered surfaceis bent inwardly so as to hold a writing ballinserted into a ball houseA boundary between the first tapered surfaceand the connecting surfaceis referred to as a first shoulder portion, and a boundary between the second tapered surfaceand the bent portiona second shoulder portion. The second shoulder portionis located inside a virtual tangent linebetween the first shoulder portionand the writing ball

Ball-point pen tip and ink refill

There is provided a ballpoint pen tip that minimizes thin spots such as impact thin spots even if upward writing or an impact causes entry of air, allows rapid return to normal writing, and minimizes manufacturing costs. A writing ball and a check ball included in the ballpoint pen tip are placed close to each other with a slight clearance therebetween to leave an inner space with a slight capacity. Thus, even if air enters from a caulking portion, the volume of the air stored inside is slight, and an air pool can be rapidly eliminated. Further, both the writing ball and the check ball can be provided in a front end of the ballpoint pen tip, and assembly operations can be easily performed without inverting the ballpoint pen tip.

Ballpoint pen tip, ballpoint pen utilizing the ballpoint pen tip and method of manufacturing the ballpoint pen tip

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Yokohama, Japan

Hiroyuki Muto