JPH061431Y2 - Writing instrument axis - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a writing instrument shaft in which a part of the shaft is provided with portions of different colors and textures to add decorativeness.

[Conventional technology]

Conventionally, as a method of providing a sandline on the surface of the shaft, for example, a method of printing (hot stamping, sicle, offset, etc.), transferring, coloring, etc. after molding is mainly used.
There is a method of simultaneously providing the molding by layer extrusion molding and a method of simultaneously providing the same molding by two-color injection molding.

[Problems to be solved by the invention]

However, the above-mentioned method of the prior art has the drawbacks of low productivity, high cost, difficulty in producing a straight line, and easy peeling of the line. There is a disadvantage that the clip cannot be integrally molded or the shaft cannot be tapered, and the method (1) has a drawback that the mold cost is high, the production cost is high, and the shaft shape is also restricted. . It is an object of the present invention to solve the above drawbacks and to provide a writing instrument shaft which can be manufactured at a low cost by having a portion of the shaft having different colors and different textures to provide decorativeness.

[Means for solving problems]

A writing instrument shaft of the present invention devised to achieve the above object has an inner shaft and an outer shaft fitted to an outer peripheral portion of the inner shaft, and has a groove of an arbitrary shape on the outer shaft. A projection that is provided so as to open at least one of the front end edge and the rear end edge, and that is inserted into the groove of the outer shaft on the side surface of the inner shaft from the opening provided in at least one of the front end edge and the rear end edge to expose the outer surface thereof. Is provided.

〔Example〕

1 to 3 show a first embodiment of the present invention. (1) is a hollow outer shaft with open front and rear ends, with a narrow linear groove from the front edge to the position slightly forward of the rear edge and a wide straight groove extending to the rear edge behind it (2 ) Is provided on the side surface. (3) is the inner shaft, and the collar is integrated with the rear end (4)
And a clip (5) are provided, and a straight line is formed from the front edge to the slightly forward position of the rear edge on the side surface rotated approximately 90 ° in the circumferential direction from the position of the clip (5), and the rear part is bifurcated. A rib-shaped protrusion (6) is provided, and a slider is attached to the inner hole to push the refill (7) forward to project the writing part (8) from the tip end mouth (10) of the mouthpiece (9). Lever for operating the lever (1
1) is exposed to the outer surface of the rear end of the side part sandwiched between the bifurcated rib-like projections (6), and the refill (7) is locked with the slider in the advanced state. Writing Department (8)
Is fixed in a state of protruding from the tip end mouth (10) of the mouthpiece (9), the locked state is released, and the slider and the refill (7) are retracted by the force of the coil spring (12) and the writing part (8) is With the locking body that immerses the inside of the base into the slider, the push button (13) for operation that is also attached to the inner hole to release the locked state with the slider is divided into two ribs. The protrusion is formed through a hole provided at the front end of the side face portion sandwiched by the protrusions (6). The outer shaft (1) fits into the groove (2) of the inner shaft (3)
The protrusion (6) is fitted into the outer periphery of the inner shaft (3), and its rear edge is brought into contact with the collar (4) of the inner shaft (3). After that, the screw part (14) formed on the inner surface of the front end of the inner shaft (3) is
The outer shaft (1) is fixed to the outer shaft (1) so that the outer shaft (1) is screwed and the rear end of the base (9) is brought into contact with the front end of the outer shaft (1). The height of the protrusion (6) should be such that the top end surface of the protrusion (6) of the inner shaft (3) fitted in the groove (2) of the outer shaft (1) and the outer surface of the outer shaft (1) are flush with each other. And outer shaft
The thickness of (1) is set to be almost the same. Also, the groove of the outer shaft (1)
The groove (2) has a width on the outer surface side that is smaller than the width on the inner surface side.
As shown in Fig. 3, the inner wall of the groove has a slope, and the side wall of the protrusion (6) of the inner shaft (3) fitted in the groove (2) has the same slope as the inner wall of the groove (2). Is provided. Both the inner shaft (3) and the outer shaft (1) are separately formed by injection molding.

Next, FIG. 4 shows a second embodiment, in which a straight groove (2) is provided on the side surface of the outer shaft (1) from the front edge to the rear edge, and the clip (5) is integrated. The outer surface of the molded inner shaft (3) is also provided with a protrusion (6) fitted into the entire groove (2).

FIG. 5 shows a third embodiment, in which the groove (2) provided in the outer shaft (1) stops near the rear edge to the front edge.

FIG. 6 shows a fourth embodiment, in which the outer shaft (1) is provided with a plurality of parallel grooves (2) from the rear end edge to the substantially central portion.

FIG. 7 shows a fifth embodiment in which the outer shaft (1) is provided with a spiral groove (2).

Not limited to the above embodiment, the shape of the groove (2) of the outer shaft (1) is arbitrary.

[Action]

In the writing instrument shaft of the present invention, the outer shaft (1) and the inner shaft (3) are formed separately, the groove (2) is provided in the outer shaft (1), and the groove (2) extends from the inner shaft (3). The outer surface portion is exposed, and a decorative effect is obtained by the difference in color or texture between the outer shaft (1) and the inner shaft (3). Outer shaft
Since the groove (2) of (1) is open to at least one of the front edge and the rear edge, it is necessary to fit the protrusion (6) of the inner shaft (3) into the groove (2) of the outer shaft (1). It is only necessary to slide the inner shaft (3) in the axial direction, and it is extremely easy to assemble the inner shaft (3) and the outer shaft (1).
The width of the outer shaft (1) on the outer surface side of the groove (2) is made narrower than the width of the inner surface side to provide a gradient on the inner wall of the groove (2) and on the side wall of the protrusion (6) of the inner shaft (3). If the same slope as the groove (2) is provided, the groove (2)
The appearance between the outer shaft (1) and the protrusion (6) is small, and the outer appearance (1) of the groove (2) is warped toward the inner surface to narrow the width of the groove (2). Even in such a case, since it is guided by the gradient, it is possible to prevent the work of inserting the projection (6) into the groove (2) from becoming difficult.

[Effect of device]

The writing shaft of the present invention is as described above. First, the writing tool shaft of the present invention has a groove of the outer shaft for exposing the side line, etc. Since it can be formed by a mold or the like, it has an advantage that it is easy to form a straight line, and of course, there is an advantage that the problem of exfoliation of the side line and the like is eliminated. Next, compared to the conventional two-layer extrusion molding that forms side lines,
In the writing instrument shaft of the present invention, the outer shaft and the inner shaft can be separately formed by injection molding or the like. Therefore, the inner shaft and the clip can be integrally formed as in the embodiment, and the writing instrument shaft having a free shape can be formed. is there. Further, as compared with the conventional two-color injection molding for forming the side lines, the writing instrument shaft of the present invention has a monochromatic outer shaft and inner shaft separately formed by injection molding or the like, so that restrictions on the shaft shape are reduced. In addition, the mold structure is simplified, and when assembling the outer shaft and the inner shaft, the inner shaft is not opened from the opening provided in at least one of the front end edge and the rear end edge of the outer shaft groove. Since it is extremely easy to insert the protrusion and slide the inner shaft with respect to the outer shaft, there is an advantage that the overall production cost can be reduced.

[Brief description of drawings]

1 to 3 show a first embodiment of the present invention,
FIG. 1 is a perspective view of the entire writing instrument, FIG. 2 is a perspective view of the writing instrument in an exploded state, and FIG. 3 is a sectional view taken along the line AA in FIG.
Also, FIG. 4 is a side view of the writing instrument of the second embodiment, FIG. 5 is of the third embodiment, FIG. 6 is of the fourth embodiment, and FIG. 7 is a side view of the writing instrument of the fifth embodiment. (1) ... outer shaft, (2) ... groove, (3) ... inner shaft, (4) ... tsuba, (5) ... clip, (6) ... rib-shaped projection, (7) ... reel, (8) … Writing part, (9)… Clasp, (10)… Tip mouth, (11)… Finger hook, (12)…
Coil spring, (13)… push button, (14)… screw part.

Claims (2)

[Scope of utility model registration request] 1. A shaft having an inner shaft and an outer shaft fitted to an outer peripheral portion of the inner shaft, wherein a groove of an arbitrary shape is formed on the outer shaft so as to open at least one of a front end edge and a rear end edge. The writing instrument shaft is provided on the side surface of the inner shaft, and is provided with a protrusion that is fitted into a groove of the outer shaft through an opening formed in at least one of the front end edge and the rear end edge to expose the outer surface. 2. A practical use in which the width of the groove of the outer shaft on the outer surface side is narrower than that on the inner surface side so that the inner wall of the groove has a slope and the side wall of the protrusion of the inner shaft also has the same slope as the inner wall of the groove. Writing implement axis according to claim 1 of claim for new model registration.