JPH0686979U - Writing instruments and other caps - Google Patents

Abstract

(57) [Summary] [Structure] The inner wall of the outer tubular portion 1 and the inner tubular portion 2 on the cap head side.
Has an open space 6 defined by the outer wall of the open space 6 and the vent hole 4 communicating between the open space 6 and the inner hole 5 such that the open space 6 is located inside and the vent hole 4 is located outside. , A small-diameter portion 8 of such a size that the head portion side of the outer tubular portion 1 can be fitted into the inner hole 5 of another cap having the same shape while maintaining the air permeability of the vent hole 4.
And the cap. [Effect] It may be a cap with safety so as not to suffocate even if an infant swallows it by mistake.
Used as a cap that can fit with each other in what is called a double-headed pen or a set of several different colors while satisfying the requirement of moldability when manufacturing injection molded products of synthetic resin In addition, in such use, safety can be secured even in such a fitted state.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 A fountain pen, small-tube writing instrument, handwriting correction tool, handwriting erasing tool, brush, eye liner, lip color, nail color cap, etc. And a vent provided to communicate with

[0002]

[Prior art and its problems]

 Although it is drawn in a somewhat schematic manner, it will be explained with reference to the accompanying drawings. First, there are those shown in FIG. 4 and FIG. It is made of an injection-molded product of synthetic resin, and the outer cylinder part 1 and the inner cylinder part 2 are connected by a connecting wall part 3 at the cap head end part, and a plurality of ventilation holes 4 penetrate the connecting wall part 3 and an inner hole 5 communicates with the outside world. Further, there is also one in which the formation positions of the connecting wall portion 3 and the vent hole 4 are changed. For example, as shown in FIG. 6, the one shown in FIG. 6 has a connecting wall portion 3 and a vent hole 4 in an intermediate portion between the outer tubular portion 1 and the inner tubular portion 2 (same below, Basically the same reference numerals are used for the same parts). In addition, although not shown, there is also one in which the connecting wall portion 3 and the vent hole 4 are located at the open end of the inner tubular portion 2.

The structure shown in FIG. 6 has an open space 6 defined by the inner wall of the outer cylinder 1 and the outer wall 2 of the inner cylinder on the cap head side. Although it is different from the one shown, it is common in that all the openings 7 of the ventilation holes 4 are exposed in the vertical direction of the drawings of FIGS. 5 and 6. Therefore, all of these have the drawback that clogging of the openings 7 of the ventilation holes 4 easily occurs due to the accumulation of dust on the wall surface of the connecting wall 3. Further, it is also possible to reinforce that a plurality of ribs connecting the inner wall of the outer tubular portion 1 and the outer wall of the inner tubular portion 2 are formed radially in the open space 6 in the example shown in FIG. However, there is a common drawback that the strength may become insufficient if the amount of air passing through the ventilation holes 4 is made sufficient. Here, if the opening amount of the ventilation hole 4 is increased, the connecting wall portion 3 becomes thin accordingly.

On the other hand, there is also one as shown in FIGS. The difference from the above is that, in the relationship between the vent hole 4 and the open space 6, the vent hole 4 and the open space 6 communicate with each other so that the vent hole 4 is located inside and the open space 6 is located outside. There is a gap in the inside and outside of the cap for communication. This can prevent the opening 7 of the vent hole 4 from being exposed in the vertical direction in the drawing. Therefore, compared to the above-mentioned ones, the ones shown in FIGS. 7 and 8 are less likely to cause clogging at the opening portion 7 of the ventilation hole 4 due to the accumulation of dust on the wall surface of the connecting wall portion 3, and By increasing the length of the opening 7 of the vent hole 4 with respect to the open space 6 in the vertical direction in the drawing, there is an advantage that the amount of air passing can be easily made sufficient.

However, if the advantages such as those shown in FIG. 7 and FIG. 8 are to be exerted at all, it is more preferable if they can also exert other advantages in combination. In this respect, what was selected in the present invention is the fitting property of the caps with each other. For example, there is a so-called double-headed pen having pen tips at both ends of the barrel, which allows writing with one cap fitted in series with the other cap. In addition, even if a plurality of caps are fitted in series, if the function of communicating the outside of the vent hole with the inner hole is satisfied, the safety is further enhanced.

[0006]

[Means for Solving the Problems]

 There are two choices for locating the ventilation hole and the open space on the inner side in order to give a gap between the ventilation hole and the open space in the inner and outer caps. Select the one where the vent is located on the outside. As described above, since this type of cap is generally an injection-molded product of synthetic resin, the moldability thereof is also taken into consideration. Then, the head side of the outer cylinder is sized so that it can be fitted into the inner hole of another cap having the same shape. This fit maintains the ventilation of the vents. That is, the present invention has an open space formed by the inner wall of the outer cylinder part and the outer wall of the inner cylinder part on the head side of the cap, and also has a vent hole that communicates the open space with the inner hole. Here, the open space and the vent hole are communicated with each other such that the open space is located inside and the vent hole is located outside, and the head side of the outer cylinder part maintains the ventilating property of the vent hole. However, the gist is a cap such as a writing instrument that is sized to fit into the inner hole of another cap of the same shape.

[0007]

【Example】

 An example will be described with reference to the attached FIGS. As described above, the open space 6 is located inside and the vent hole 4 is located outside. The inner space of the open space 6 is gradually narrowed so that it does not have a bottom surface. However, the moldability of the above-mentioned synthetic resin injection-molded product is also taken into consideration here. It is changing gently. Further, the number of the air holes 4 drawn by six may be appropriate. Due to the positional relationship between the open space 6 and the vent hole 4, the entire cap has an air passage having a small diameter on the head side and a large diameter on the open end side. Accordingly, the outer cylinder portion 1 also has a small diameter portion 8 on the head side and a large diameter portion 9 on the opening end side. The small-diameter portion 8 is sized to fit in the inner hole 5 (see FIG. 3). Here, although the one shown in the drawing is for press-fitting fitting using the inward projection 10 for fitting to the main body (not shown), it may be for fitting by concavo-convex fitting or crossover fitting. .

The air permeability of the ventilation hole 4 is not hindered by the fitting of the small diameter portion 8 into the inner hole 5. This is because the length from the inner hole side end portion 11 of the ventilation hole 4 to the opening end portion of the inner hole 5 is shorter than the length of the small diameter portion 8 on the head side of the outer tubular portion 1. However, the inner hole side end 11 of the ventilation hole 4 does not have to be shielded by fitting. For example, in the illustrated example, the inner hole side end 11 of the ventilation hole 4 is formed by a taper wall. Therefore, the small-diameter portion 8 may be linearly abutted against the taper wall. Further, for example, the one shown in the drawing has a groove-shaped opening so that the ventilation hole 4 also opens toward the inner side in the radial direction with respect to the inner hole 5, so that the small-diameter portion 8 is assumed to be the taper wall. It does not matter if it is something that seals. In addition, although not shown, a slit for connecting the open space 6 and the outer wall of the small diameter portion 8 is provided in the small diameter portion 8, or the head portion side of the small diameter portion 8 forms a space with the inner hole 5 and has a smaller diameter. The ventilation of the ventilation hole 4 can be ensured by various methods, such as forming a portion or providing a large number of ridges on the outer wall of the small diameter portion 8. Therefore, it is possible that the opening end portion of the inner cylindrical portion 2 extends beyond the opening end of the ventilation hole 4 on the inner hole 5 side as shown in FIG.

[0009]

[Effect of device]

 The cap of the present invention has an open space formed by the inner wall of the outer cylinder part and the outer wall of the inner cylinder part on the cap head side, and also has a ventilation hole that connects the open space and the inner hole. This may provide a safety cap that prevents suffocation from accidental swallowing by an infant or the like.In addition, the open space and ventilation hole should be located inside the open space and outside the ventilation hole. And the head side of the outer cylinder is sized to fit the inner hole of another cap of the same shape while maintaining the air permeability of the air hole. Use as a cap of the same shape that can fit with each other in so-called double-headed pens, or a set of several different colors while satisfying the requirement of moldability when manufacturing molded products And in such use, this Even in una fitted state, you can ensure safety.

[Brief description of drawings]

FIG. 1 is a vertical sectional view for explaining an embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along the line AA of FIG.

FIG. 3 is a vertical cross-sectional view showing a state in which two pieces of FIG. 1 are fitted in series.

FIG. 4 is a front view for explaining an example of a conventional technique.

5 is a vertical cross-sectional view of the one shown in FIG.

FIG. 6 is a vertical cross-sectional view for explaining another example of the conventional technique.

FIG. 7 is a vertical sectional view for explaining another example of the conventional technique.

8 is a cross-sectional view taken along the line BB of FIG.

[Explanation of symbols]

 1 outer cylinder part 2 inner cylinder part 3 connection wall part 4 ventilation hole 5 inner hole 6 open space 7 opening of ventilation hole 8 small diameter part 9 large diameter part 10 inward projection 11 end part of inner side of ventilation hole

Claims (1)

[Scope of utility model registration request] 1. A cap head side has an open space defined by an inner wall of the outer cylinder part and an outer wall of the inner cylinder part, and a vent hole communicating between the open space and the inner hole, wherein: The open space and the vent hole are communicated so that the open space is located inside and the vent hole is located outside, and the head side of the outer cylinder part has the same shape while maintaining the air permeability of the vent hole. A cap for writing implements, etc. that is sized to fit into the inner hole of another cap.