JPS6015648Y2 - Handle of a handy tool with a pattern on the handle - Google Patents

Description

[Detailed description of the invention] This invention relates to the handles of useful tools such as pocket knives and mountain climbing knives, which have decorative patterns embedded in the surface of the handle.

Conventionally, as a technique for forming a pattern on the handle of a handy tool, there is a knife handle disclosed in Utility Model Publication No. 33-12693.

This knife has a dovetail-shaped hole formed in the synthetic resin handle of the knife, and both sides of the cloisonné product are tapered and supported. Because the cloisonné product is cast into a synthetic resin handle, it is not possible to form a pattern of any desired design, and it is not possible to easily polish it with sandpaper after casting the cloisonné product into a synthetic resin handle. However, it requires a high level of skill and effort to manufacture, making it expensive, and it has drawbacks such as the fact that cloisonné products are chipped in useful tools that require strength.

In addition, as another conventional technology, Utility Model Application Publication No. 48-110291
The product described in No. 1 is a product in which a recess is formed in a metal product, a thin metal wire is stretched and fixed in the recess, and a synthetic resin filler is filled in the recess. Since it is formed by press working on a metal product, its shape is limited, and the recess has to be formed in a limited part due to the strength of the metal product. Since it only has a uniform depth, when viewed from the outside, the resin filled therein cannot create a difference in color brightness to enhance the design effect.

The present invention solves the above-mentioned drawbacks, and allows a pattern of any shape to be easily formed on the handle of a handy tool.
To provide a handle of a handy tool with a pattern attached to the handle, which is excellent in design effect, can be manufactured easily and inexpensively, and has excellent durability in the pattern part without impairing the strength of the handle. With the goal.

This invention will be described in detail below based on illustrated embodiments.

1 is a pocket knife, and 2 is a blade portion of the pocket knife 1.

Reference numeral 3 designates a handle portion of the pocket knife 1, and reference numeral 4 designates a front portion made of synthetic resin or wood that forms a part of the handle portion 3, and is disposed on both sides of the handle portion 3.

5 is a colored pattern fixed on this front portion 4.

In the embodiment, it is an arrow pattern, but it can be made of arbitrary characters, figures, symbols, etc.

This pattern 5 is created by digging a groove 6 on the surface of the front part 4 using a carving machine, pouring the thermoplastic plastic 7 there in a molten state, then hardening it at room temperature, and polishing the surface together with the surface of the front part 4. It has become established.

The groove portion 6 is provided with a step in its depth, for example, the second groove portion 6 has a step.
As shown in Figures a and b, it is formed in two stages, a shallow groove portion 6a and a deep groove portion 6b.

The reason for forming the step in the groove 6 in this way is that when forming the groove 6 using a carving machine, the area of the groove is increased by deepening only a part of the groove instead of increasing the depth uniformly. To make the groove processing relatively easy at the most, the thermoplastic plastic 7 to be filled into the groove 6 is made to have a difference in depth and brightness in appearance, and the amount of excavation of the surface part 4 is made to be different. This is done so that the strength of the front part 4, which is provided integrally with the handle part 3, is not impaired by reducing it as much as possible.

In the groove 6, as shown in FIGS. 2a and 2b, an inclined surface 10 is formed on the inner surface 8 of the deep groove 6b which is the deepest groove. The thermoplastic plastic 7 forming the pattern that is filled in and hardened is prevented from peeling off easily.

Furthermore, one or more heat-resistant core wires 11 of an appropriate length, such as ultrafine mild steel wire or white asbestos fiber, are arranged at the bottom of the deep groove 6b, which is the deepest groove.
The thermoplastic plastic 7 forming the pattern that is filled in and hardened is prevented from peeling off easily.

As mentioned above, in the present invention, a groove is formed by digging with a carving machine or the like on the surface provided on the side surface of the handle of a handy tool, so it is possible to create patterns in a wide variety of arbitrary shapes. It is easy to make, and since the groove has a step in its depth, the thermoplastic plastic disposed inside the groove has a difference in brightness in appearance, increasing the design effect in terms of the color of the pattern, and Even if the area is large, only a portion of the area needs to be deepened, which simplifies the labor required for excavation and eliminates the need to excavate the top part more than necessary, so the strength of the top part is not compromised. .

In addition, because the inner surface of the deepest groove is formed with an inclined surface, and the heat-resistant core wire is placed at the bottom of the deepest groove, the thermoplastic plastic disposed inside the groove is exposed to the surface on the inner surface and bottom of the deepest groove. It is locked and the pattern does not easily peel off even after long-term use.

[Brief explanation of drawings]

Figure 1 is a front view of a pocket knife with a pattern on the handle.
Figures 2 at b are cross-sectional views of the groove. 3...Handle part, 4...Front part, 6...
...Groove, 6a...Deepest groove, 7...
Thermoplastic plastic, bottom: inner surface of deepest groove, 9: inner surface, 10: inclined surface, 11: heat-resistant core wire.

Claims (1)

[Scope of utility model registration request] A surface portion 4 made of an engravable material is provided on the surface of the handle portion 3 of the handy tool, and a groove portion 6 of an arbitrary shape is dug on the surface of the surface portion 4 with a stepped depth. 6, an inclined surface 10 is formed on the inner side surface 8 of the deepest groove portion 6b, and a heat-resistant core wire 11 is disposed at the bottom of the deepest groove portion 6b. A handle of a handy tool having a pattern on the handle, characterized in that a thermoplastic plastic 7 is poured into and cured.