JP2640169B2 - Writing instrument cap - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a safety cap for preventing suffocation caused by accidental swallowing, and more particularly, to an inner cylinder and an inner cylinder that hermetically seal and cover the tip of a writing instrument. The present invention relates to a writing instrument cap that integrally forms an outer cylinder that accommodates the outer cylinder and forms a sufficient axial air passage between the inner cylinder and the inner cylinder.

(Prior Art) Conventionally, there is a writing instrument cap in which an air passage is communicated in the axial direction in order to prevent suffocation by accidentally swallowing, and at the same time, in order to prevent drying of the tip of the writing instrument, An inner cylinder that covers the distal end and an outer cylinder that accommodates the inner cylinder, for example, those shown in FIGS. 12 and 13 have been proposed. In this proposal, an inner cylinder (B) is accommodated in an outer cylinder (A) that is opened up and down, and a center of the inner cylinder (B) is connected to an inner wall of the outer cylinder (A) by a coupling body (C). When the tip of the writing implement is securely inserted into the inner cylinder (B), elasticity is given to secure tight fit.

(Problems to be Solved by the Invention) However, in the above-described structure, since the coupling body (C) is connected only to the center portion of the inner cylinder (B), elasticity is generated between the outer cylinder and the inner cylinder, and the centering action is performed. Can be securely fitted to the tip of the writing implement, but the connecting part is in the center and cannot be enlarged, so that during manufacture, bending, misalignment, deviation, deformation, etc. of the inner cylinder and outer cylinder are likely to occur, In addition, if the connection part becomes a bottleneck in the flow of molding material during production and the material flows in from one side, dimensional instability of the other side, generation of weld lines, occurrence of gas burn, short circuit This may cause molding defects such as a mold. Moreover, since the space (E) cannot be sufficiently secured between the top of the inner cylinder and the upper opening of the outer cylinder, if swallowed by mistake, saliva accumulates in the space (E) or the air passage of the cap is closed by the airway. There is a risk of doing so.

In view of the above, the present invention has been made to solve the above-mentioned drawbacks of the prior art, in which the writing tip is easily fitted in the inner cylinder, the inner cylinder is reliably supported, and air is sufficiently introduced above the cap. It is intended to obtain a product that can secure a part.

(Means for Solving the Problems) To this end, a plurality of support walls are provided so that an inner cylinder whose top is closed is accommodated in an outer cylinder that opens vertically, and an air passage that communicates in the axial direction between the inner and outer cylinders. The inner wall and the outer wall are integrally connected with each other, and the lower edge of the support wall is positioned above the lower edge of the inner cylinder, and the support wall is extended above the inner cylinder, and the outer wall of the top of the inner cylinder is supported by the support wall. Further, the inner cylinder is projected above the outer cylinder, and the outer surface of the top of the inner cylinder is supported by a support wall.

(Action) Because of the above configuration, even if the cap is accidentally swallowed,
Since an air passage having a sufficient cross-sectional area is provided between the inner and outer cylinders, there is no risk of suffocation, and sufficient space is provided between the top of the inner cylinder and the upper end of the outer cylinder or the upper part of the support wall via a support wall. As a result, saliva and the like do not accumulate in this part to promote suffocation, and the inner cylinder is supported by the support wall over a wide area, so that the inner cylinder moves within the outer cylinder and causes new suffocation. There is no fear. Moreover, since the lower edge of the support wall is located above the lower edge of the inner cylinder, sufficient elasticity can be imparted to the lower part of the inner cylinder, and the writing tip that is closely fitted in the inner cylinder is deviated from the center. Even if there is, it is possible to adjust and fit tightly, and furthermore, since there is no support wall at the time of integral molding of the cap at the outer periphery of the tight fitting, there is no thickened portion and the thickness is uniform, so the inner periphery of the lower edge is It can also prevent sink marks that occur.

(Examples) The present invention will be further described with reference to examples shown in the drawings. In the respective drawings, the same reference numerals indicate the same parts.

1 to 3 show a first embodiment. (1) is an outer cylinder, which is formed of a cylinder which is opened up and down, and has a locking groove (6) for engaging with an engagement ring (8) of a brush shaft (7) on an inner wall at a lower end. An inner cylinder (2) is accommodated in the outer cylinder (1), and an appropriate number of support walls (11) are provided between the outer periphery of the inner cylinder (2)) and the outer surface of the top (11) and the inner periphery of the outer cylinder (1). The inner cylinder (2) is integrally connected by 3), and an air passage (4) communicating vertically in the axial direction is formed in other portions. The air passage (4) needs to have a cross-sectional area of 6.8 mm ² or more in order to secure an air passage in the axial direction even if swallowed by mistake. In addition, the cap is shown to be integrally formed with the outer cylinder (1), the inner cylinder (2), and the support wall (3), that is, the outer cylinder (1) and the inner cylinder ( The connection part of 2) is indicated by a dotted line in the outer cylinder (1).
And the inner cylinder (2) are integrally engaged by the support wall (3) (the same applies to FIGS. 4 and 7). The lower edge (12) of the support wall (3) is the lower edge (13) of the inner cylinder (2).
The stepped portion is provided with an annular space portion (5). When the lower end of the inner cylinder (2) is fitted with the brush shaft, the support wall (3) portion and other portions are inserted into the opening portion. This is because not only the shrinkage due to the change in the wall thickness of the portion causes sink during molding to prevent distortion around the opening, but also imparts elasticity to the inner cylinder (2). (9) is the writing tip, and (10) is the writing section.

FIGS. 4 to 6 show a second embodiment in which the support wall (3) for supporting the top (11) of the inner cylinder (2) is not joined at the center, and a sufficient air passage (4) is also provided in this portion. ) Is only different from the first embodiment in that it is formed.

FIGS. 7 to 9 show a third embodiment, in which the upper part of the support wall (3) and the top part (11) of the inner cylinder (2) project from the upper part of the outer cylinder (1). , The inlet of the air passage (4) between the inner cylinders (2) is made wider so that the air can be surely circulated and even if the air is trapped only in the axial direction and the direction perpendicular to the axial direction. The suffocation can be prevented by the upper air passage (4 '), and there are no other differences from the first and second embodiments.

Since each embodiment is configured as described above, the inner cylinder (2)
Is supported and fixed in a wide area in the axial direction by the support wall (3) over the side surface from the outer surface of the top (11), so that it can be made thinner in the circumferential direction by that much, and a sufficient shaft is provided between the support walls (3). An air passage (4) communicating up and down in the direction can be secured, and the lower end edge of the inner cylinder (2) protrudes below the support wall (3). 2)
Can be held with sufficient elasticity and the inner cylinder (2) of the brush shaft (7)
Upon insertion into the inside, the inner cylinder (2) and the brush shaft (7) can be closely fitted with each other as appropriate.

(Effects of the Invention) As described above, since the present invention can be integrally formed, mass production is easy, and the writing instrument can be held in a dry state by the inner cylinder which is securely held in the outer cylinder and is hermetically sealed. It has an excellent effect as a safety cap that can prevent suffocation caused by swallowing the cap.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view showing a state fitted to a brush shaft according to a first embodiment of the present invention, FIG. 2 is a top view thereof, and FIGS. 3 and 4 are respectively X-XY of FIG. FIG. 5 is a partial perspective view, and FIGS. 6 to 8 are longitudinal side views, top views, partial perspective views, and FIGS.
FIG. 11 is a side view and a top view of the third embodiment,
12 and 13 show a side view and a top view of a conventional device. 1 ... outer cylinder, 2 ... inner cylinder, 3 ... support wall, 4 ... air passage, 5 ... annular space, 11 ... top of inner cylinder

Claims (2)

(57) [Claims] An inner cylinder for closing an apex is accommodated in an outer cylinder comprising a cylindrical body which is opened and closed vertically, and an air passage communicating in an axial direction between an outer periphery of the inner cylinder and an inner periphery of the outer cylinder is formed. And a plurality of support walls for integrally connecting the inner wall and the lower wall of the support wall, the lower end of which is located above the lower end of the inner cylinder, and the upper end of which is extended above the top of the inner cylinder to support the outer surface of the inner cylinder section. Writing instrument cap. 2. The writing instrument cap according to claim 1, wherein the upper portion of the support wall projects above the outer cylinder, and the support wall supports the outer surface of the top of the inner cylinder that projects from the upper portion of the outer cylinder.