JP2515788Y2 - Writing-axis grip cylinder for writing instrument cap - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an improvement of a writing shaft gripping cylinder of a writing instrument cap.

(Prior Art) Conventionally, a so-called wig is referred to as a so-called wig, and a brush shaft holding cylinder made of a metal cylinder body and having a central portion bulged inward by its elasticity is fitted, When the cap is fitted on the writing instrument, the tubular body holds the shaft tube of the writing instrument to prevent the cap from falling off the writing instrument.

(Problems to be solved by the invention) However, since the grip cylinder is fitted on the inner surface of the writing instrument cap, as the number of times the cap is fitted increases, friction between the shaft cylinder surface and the grip cylinder inner surface may occur. The surface of the barrel may be scratched, and the appearance may be impaired, and the scratches may cause rust. In order to prevent this, it has been proposed to coat the inner surface of the gripping cylinder with a fluororesin (Actual No. 1-104387), but the surface of the shaft is particularly resistant to friction. If it is large, for example, in a satin pattern, the surface of the shaft cylinder will be scratched by peeling of the coating film even if the number of times the cap shaft cylinder is fitted is relatively small, about 50 times.

Therefore, this invention intends to obtain a brush shaft gripping cylinder in which the surface of the shaft cylinder is not damaged by the removal of the cap, the shaft cylinder can be reliably gripped, and the coating film does not easily peel off.

(Means for Solving the Problem) For that purpose, a coating layer of a resin paint for mixing pigment resin beads into urethane resin is provided on the inner surface of a metal brush holding cylinder made of an elastic material that is fitted to the inner surface of a writing instrument cap. It is a thing.

(Operation) Since the cap has a structure as described above, when the cap is fitted into the shaft cylinder, the urethane cylinder has a soft contact with the shaft cylinder in addition to the elasticity of the grip cylinder, so that a tight fit can be achieved. Above all, especially when the pigment resin beads are mixed, the friction coefficient of the coating film is further lowered, and even if the desorption of the cap is increased, the peeling of the coating layer does not occur.

(Embodiment) This invention will be described in more detail with reference to an embodiment shown in the drawings. (1) is a writing instrument cap, one end of which is an opening for fitting into the barrel (6) and the other end of which is closed. The clip (2) is fixed to a side portion of the cap (1) close to the closed portion, while the brush shaft holding cylinder (3) is fitted to the inner surface of the cap (1) close to the opening. Brush holding cylinder (3)
Has elasticity, the central portion is bulged inward, and the slit (5) is appropriately provided along the axial direction to form a grip portion.
The elasticity enables the barrel (6) to be gripped (Fig. 2). A resin coating material containing urethane resin as a main component is applied to an inner surface of the brush shaft gripping cylinder (3), at least a portion that comes into contact with the shaft cylinder (6) when it is fitted in, to form a coating layer (4). This paint is a mixture of urethane resin and pigment resin beads. For example, urethane resin 11.1% by weight, black pigment resin beads 21.2% by weight, solvent 66.0% by weight, organic additive 1.7% by weight and curing agent. After mixing these, the brush shaft gripping cylinder (3) is sprayed on the inner surface of the barrel (3) with a coating layer of approximately 5-10.
A coating layer of μ is provided. (7) is a writing instrument, and a writing body made of a ball or a resin filament is provided at the tip.

Since this example has the above-mentioned constitution, even if it is repeatedly attached and detached to and from the shaft cylinder (6) (the leading shaft) having a satin pattern for 5000 times, the peeling of the coating layer on the inner surface of the brush shaft gripping cylinder is not recognized. It was On the other hand, in the case of NI-Cr plating, the surface of the tip shaft was scratched by peeling the coating layer 1000 times.

(Effects of the Invention) As described above, the writing tube cap can be reliably held as the writing tube gripping tube of the writing instrument grip without causing scratches on the axial tube, and can be prevented from falling off. It has an excellent effect that the peeling of the film is less likely to occur.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view of a writing instrument cap of the present invention in a state of being fitted into a barrel, FIG. 2 is a perspective view of a brush-holding barrel, and FIG. 3 is an enlarged cross-sectional view of FIG. It is a figure. 1 ... Writing instrument cap, 2 ... Clip, 3 ... Brush axis gripping cylinder, 4 ... Paint layer

Claims (1)

(57) [Scope of utility model registration request] 1. A writing brush for a writing instrument cap, which comprises an elastic metal tube fitted to the inner surface of the writing instrument cap, and a coating layer of a resin coating for mixing pigment resin beads with urethane resin is provided on the inner surface of the metallic tube. Ax gripping cylinder.