Abstract: A tape guide roller for a tape cassette comprises an inner cylindrical body including a flange portion projecting from the outer circumference on one end thereof, and a synthetic resin injection portion provided at the outer circumferential surface at the other end thereof, the inner cylindrical body being molded by injecting synthetic resin from a direction substantially perpendicular to the axial direction thereof and an outer cylindrical body having an inside diameter such that it fits tightly over the inner cylindrical body, and includes a synthetic resin injection portion provided at the outer circumferential surface on the end side thereof opposite to the end side which serves as the insertion end for the inner side cylindrical body. The outer cylindrical body is molded by injecting synthetic resin from a direction substantially perpendicular to its axial direction through the synthetic resin injection portion.

Abstract: There is provided a lancet assembly having a holder and a lancet structure which is incorporated with the holder, the lancet structure containing a lancet member having a pricking member and an ejector which ejects the lancet member, wherein an exposed portion of the pricking member is covered with a resin. In a preferred embodiment, a lancet body and a covered pricking member have portions mating each other so that the lancet body and the covered pricking member tightly engage with each other. In another preferred embodiment, at least one notch is provided to the covered pricking member. In a further embodiment, the covered pricking member contains two pairs of stops on its outside.

Abstract: A tape guide roller for a tape cassette comprises an inner cylindrical body including a flange portion projecting from the outer circumference on one end thereof, and a synthetic resin injection portion provided at the outer circumferential surface at the other end thereof, the inner cylindrical body being molded by injecting synthetic resin from a direction substantially perpendicular to the axial direction thereof and an outer cylindrical body having an inside diameter such that it fits tightly over the inner cylindrical body, and includes a synthetic resin injection portion provided at the outer circumferential surface on the end side thereof opposite to the end side which serves as the insertion end for the inner side cylindrical body. The outer cylindrical body is molded by injecting synthetic resin from a direction substantially perpendicular to its axial direction through the synthetic resin injection portion.

Abstract: A lancet comprising a lancet body having a needle end protruding from a lancet end, and a needle protector for protecting the protruding needle end before use, the needle protector comprising a hood portion tightly fittable on the lancet end from which the needle end protrudes in such a manner that the hood may be fitted over the lancet end to the needle end to substantially insulate the needle end from the environment after use. The lancet body and the needle protector may be integrally molded, and separated before use to expose the needle end. After use, the hood of the protector may be fitted over the lancet end. Thus, the lancet as a whole can be disposed in a safer manner than the prior art lancets.

Abstract: A blood-collecting apparatus comprises a lancet assembly composed of a lancet body and a protector, with the lancet body having a needle end which is protected by the protector. The apparatus further comprises a pricking device and an end cap, with the device separably holding the lancet body, while the end cap being formed with an opening through which the needle end can advance back and forth. The lancet body has a first locking means and an arm means corresponding to a first lockable means and a second lockable means of the end cap, respectively. The apparatus is easy to use, and those means cooperate with one another to eliminate the infection or other hygienic problems when taking a blood sample and also to render the used apparatus safely disposable.