JPH0712053Y2 - Exterior body - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) An exterior body (hereinafter simply referred to as an exterior body) that is to be held by a hand, and is made of a synthetic resin and has a surface subjected to thermal transfer printing treatment. .

(Prior art) Writing implements such as fountain pens, ballpoint pens, Kosuge-style writing implements, eyeliners, eye shadows, lip color and other makeup implements,
In addition, there are various types of exterior bodies such as pen type erasers that have become popular in recent years and shaft cylinders such as handwriting correction tools and caps, but they are made of relatively inexpensive synthetic resin. It has been known that the surface is subjected to thermal transfer printing such as hot stamping in order to display a code, a product name, a manufacturer name, or to improve decorativeness.

(Problems to be solved by the invention) Thermal transfer printing is a printing method by transferring the ink on a film to a material to be printed by pressurizing and heating. However, when the material to be printed is a synthetic resin exterior body, Print defects often occur. That is, the exterior body is, for example, in the case of a writing instrument that uses ink, such as an ink tank and a pen tip portion, in the case of a knock type mechanical pencil, a core tank and a knock mechanism, and in the case of eraser, Erasers, etc. are used to store parts or materials inside according to their respective structures, while they are held by the hand, and are therefore limited in increasing thickness. It is bent by the applied pressure at the time of printing, and some areas are not printed.

On the other hand, in order to reduce the pressing force, it is necessary to spend a corresponding amount of time, but this adversely affects mass productivity. Further, by selecting and using a synthetic resin material that is not very flexible, it is possible to reduce the occurrence of the printing failure described above, but the material of the outer package is not determined only by the printability. , For example, in the case of using ink, it may be possible to suppress the microscopic transmission of the internal ink as much as possible.
We cannot always be satisfied.

Therefore, what is conceivable is to superimpose and print a material having a good printability on a portion requiring printing, which is made of a material according to each purpose. By doing so, the above-mentioned troubles are eliminated. But this time, another problem arises. That is, in order to ensure that the components that are superposed on each other have sufficient integrity and that this superposition can be easily performed, a member that comes inside (hereinafter referred to as an inner member) and a member that comes outside (hereinafter referred to as (Referred to as an outer member) are fixed to each other by press-fitting with a sufficient length, but press-fitting over a long distance is by no means productive, and as a countermeasure, as shown in FIG. 6 attached. , Inner member 1 and outer member 2, respectively, press-fitting start portion
If only the 1a, 2a and the end portions 1b, 2b are set as the outer casing A and the intermediate portion 3 at the start and end of the press-fitting is left as a space, the problem of the material described above, that is, the problem of flexibility Appears as it is (see FIG. 7). Incidentally, FIG. 7 shows an example of hot stamping, and reference numeral 4
Indicates a heating printing plate.

(Means for Solving the Problem) It is an object of the present invention to provide good printability for each outer body that is to be appropriately selected in relation to the internal structure and function. In addition, the above-mentioned press-fitting intermediate portion is a superposed body having a space, and in addition, the inner member and the outer member are partially brought into contact with each other by the protrusion in this space portion. That is, the present invention is an exterior body which is to be gripped by a hand, and which is made of a synthetic resin and whose surface has been subjected to a thermal transfer printing process. The exterior body includes an inner member and an outer member which are fixed to each other by press fitting. An intermediate portion of the press-fitting portion between the inner member and the outer member serves as a space portion in which the inner member and the outer member partially contact with each other by a protrusion, and a contact portion of the protrusion in a portion corresponding to the thermal transfer print processing area of the space portion. The gist is an exterior body formed by forming.

(Embodiment) A first embodiment is shown in FIGS. In the following, the same reference numerals are used for the same parts. FIG. 1 shows the overall image and is shown as a writing instrument. Further, the printed portion B is shown as "12345", and of course, any of these may be used. The print area of the print portion B is also appropriate. FIG. 2 is an enlarged view of the cross-sectional portion of FIG. 1, and this FIG. 2 shows the same thing as that shown in FIG. 7 at first glance. However, as further shown in FIG. 3 showing the cross section of FIG. 2, a plurality of ribs 5 extending in the press-fitting direction and contacting the inner wall of the outer member 2 at their ends are provided in the inner member 1. Has been formed. That is, although the press-fitting intermediate portion 3 is a space, it is divided in the press-fitting direction. When these ribs 5 are printed, the outer member 2
It will be a support to stop the bending of. Here, referring to the materials of the inner member 1 and the outer member 2, as described above, the inner member 1 is appropriately selected in relation to the internal structure and the function.
Examples thereof include polyethylene, polypropylene, polyamide, polyacetal, and polycarbonate, and the outer member 2 may be appropriately selected according to the desired printing. It is good.

Next, FIG. 4 and FIG. 5 show a second embodiment. In this example, protrusions 5'formed in a staggered pattern are formed as an alternative to the rib 5 of the previous example. Even if the rib 5 of the preceding example is always in contact with the outer member 2, it can be easily put into the outer member 2 once the press-fitting is started, and can be easily formed by injection molding or the like. Because of its shape, instead of being formed on the inner member 1, it may be formed on the inner wall of the outer member 2 so as to project inward.
It is also possible to form the inner member 1 and the outer member 2 respectively, and in this respect, the protrusion 5'of this example is difficult to insert because it is separated, and in terms of molding, it is as free as the rib 5. It has no property and is formed on the inner member 1 side as far as possible, but since it can be formed in a dispersed manner, the function as a support can be more effectively exhibited. By the way, the inner hole end of the press-fitting start portion 2a of the outer member 2 in FIG. 4 is expanded, which facilitates the insertion of the projection 5'formed on the inner member 1.

In addition, although not shown, various modifications can be made. For example, even when it is a “rib”, it may extend in a direction other than the press-fitting direction, and may be formed in a spiral shape, for example. Further, each member such as the inner member and the outer member may be made of a combination of a plurality of parts as appropriate, or may be a resin product that is appropriately processed within a range not changing the gist.

(Effects of the invention) For each outer body that is appropriately selected in relation to the internal structure and function, it is possible to obtain sufficient printability while sufficiently satisfying mass productivity, and for example, In the case of an exterior body such as a writing instrument with a built-in ink, there is also an accompanying effect that a shaft body having good heat insulation can be used.

[Brief description of drawings]

FIG. 1 is a partial sectional side view showing a first embodiment of the present invention, FIG. 2 is an enlarged view of a sectional portion of FIG. 1, and FIG.
FIG. 4 is a transverse sectional view taken along the line I, FIG. 4 is an enlarged sectional view of an essential part corresponding to FIG. 2 showing a second embodiment, and FIG. 5 is a transverse sectional view taken along the line II-II of FIG.
FIG. 7 and FIG. 7 are cross-sectional views of essential parts for explaining the problem to be solved. A ... Exterior body, B ... Printing pressure part, 1 ... Inner member, 1a ...
Inner member press-fitting start portion, 1b ... Inner member press-fitting end portion, 2 ...
… Outer member, 2a …… Press-fit start part of outer member, 2b …… Press-fit end part of outer member, 3 ... Press-fit middle part, 4 …… Stamp plate, 5 ……
Ribs, 5 '... protrusions.

Claims (1)

[Scope of utility model registration request] 1. An exterior body to be gripped by a hand, which is made of a synthetic resin and whose surface has been subjected to a thermal transfer printing process, comprising an inner member and an outer member which are fixed to each other by press-fitting. The intermediate portion of the press-fitting portion between the material and the outer member serves as a space portion where the inner member and the outer member partially contact with each other by the protrusion, and the contact portion of the protrusion is provided in the portion corresponding to the thermal transfer print processing area of the space portion. The exterior body formed.