JPH088157Y2 - Safety cap for writing instruments - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a safety cap for a writing instrument or the like that is fitted to a writing instrument or other liquid container, etc., and has taken safety measures when swallowed by an infant or the like. is there.

[Conventional technology]

Generally, writing instruments such as fountain pens and felt-tip pens, and other caps such as portable containers are formed in a cylindrical shape with a smooth surface and a closed head, so that even an infant or the like can easily attach and detach them.

[Problems to be solved by the device]

Such a conventional cap may be sucked, chewed, or put in the mouth by an infant or the like, and especially if accidentally swallowed, there is a great risk of choking the bronchus and choking. There was a problem.

The present invention was made to solve the above problems, and a writing instrument that can minimize the risk of choking even if an infant or the like puts it in their mouth or swallows it. The purpose is to provide a safety cap such as.

[Means for solving the problem]

A safety cap for a writing instrument and the like according to the present invention comprises a cap outer cylinder detachably fitted to the tip of the writing instrument and a liquid container, a vent hole formed in the head of the cap outer cylinder, and the cap outer cylinder. It is slidably housed in the cylinder in the axial direction, and forms an air passage between the inner wall surface of the cap outer cylinder and
When the cap outer cylinder is fitted to the writing instrument and the liquid container, etc., the writing section of the writing instrument or the mouth of the liquid container is sealed, and the cap inner tube is pushed in a direction of closing the vent hole, and A valve provided on the cap inner cylinder, which opens and closes the vent hole by axial movement of the cap inner cylinder, and an elastic body which constantly biases the cap inner cylinder in the valve opening direction of the valve portion. Is.

[Action]

The safety cap according to the present invention, when fitted to the tip side of a writing instrument, a liquid container or the like, the tip side is inserted into the inside of the cap inner cylinder, and at the time of insertion, the cap inner cylinder is pushed against the elastic body, At the same time that the valve portion of the cap inner cylinder closes the vent hole of the cap outer cylinder, the tip end side of the writing instrument, the liquid container, or the like is sealed by the cap inner cylinder. Therefore, it is possible to reliably prevent the volatile substance from evaporating from the writing instrument, the liquid container, or the like. Further, when the safety cap is removed from the writing instrument, the liquid container, or the like, the cap inner cylinder is pushed by the elastic body so that the valve portion opens the ventilation hole, and the ventilation passage between the cap outer cylinder and the cap inner cylinder is formed. By opening the safety cap, even if an infant or the like puts the safety cap in his / her mouth and inhales or swallows it, it is possible to surely avoid a situation such as suffocation due to the air passage in the opened state.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view showing a safety cap according to an embodiment of the present invention.

In the figure, 1 is a writing instrument using volatile ink, 1a is a writing portion at the tip of the writing instrument, 1b is a cap engaging groove provided on the outer periphery of the writing instrument 1 on the tip side, and 2 is removable from the tip of the writing instrument 1. It is a safety cap to be fitted.

The safety cap 2 comprises a combination of a cylindrical cap outer cylinder 2a having a head portion 2b and a cap inner cylinder 2h housed in the cap outer cylinder 2a so as to be movable in the axial direction.

Here, the head 2b of the cap outer cylinder 2a is provided with a vent hole (vent passage) 2c opening to the center.

The cap outer cylinder 2a has an engaging projection 2d for releasably engaging with the cap engaging groove 1b of the writing instrument 1 when the writing instrument 1 is fitted. Protrusion 2d
Are provided on the inner peripheral surface of the cap outer cylinder 2a on the lower end opening side in a scattered manner along the circumferential direction at predetermined intervals.

Furthermore, a plurality of guide ribs 2k extending in the axial direction are integrally formed on the inner peripheral surface of the cap outer cylinder 2a, and the outer peripheral surface of the cap inner cylinder 2h slides on the guide ribs 2k and moves in the axial direction. It is supposed to do.

On the other hand, at the center of the head of the cap inner cylinder 2h, a valve portion 2i for opening and closing the vent hole 2c of the cap outer cylinder 2a is integrally provided.

Further, a tapered portion 2j that expands in a trumpet shape is integrally formed on the peripheral wall portion on the lower end side of the cap inner cylinder 2h.
The end portion of the cap is locked to the engaging projection 2d of the cap outer cylinder 2a, so that the cap inner cylinder 2h does not come out of the cap outer cylinder 2a.

The cap inner cylinder 2h is integrally formed of elastic synthetic resin so as to be inserted into the cap outer cylinder 2a from the lower end opening side.

The cap inner cylinder 2h is a spring (elastic body) in the direction in which the valve portion 2i opens the vent hole 2c of the cap outer cylinder 2a.
Energized with S.

The safety cap 2 configured as described above forms a ventilation path (a ventilation portion) 2m between the cap outer cylinder 2a and the cap inner cylinder 2h, and the cap inner cylinder 2h is pushed by the spline S. In a valve open state in which the end of the tapered portion 2j is locked to the engaging projection 2d of the cap outer cylinder 2a, the vent passage 2m is in an open state in which the vent hole 2c communicates with the inside of the lower end of the cap outer cylinder 2a. It is designed to be

 Next, the operation will be described.

When the safety cap 2 is fitted on the tip side of the writing instrument 1, the writing portion of the writing instrument 1 is inserted into the cap inner cylinder 2h of the safety cap 2.
1a is inserted. In this case, the tapered peripheral wall portion on the tip side of the writing instrument 1 abuts on the tapered portion 2j of the cap inner cylinder 2h to move the cap inner cylinder 2h against the spring S, and the engaging projection of the cap outer cylinder 2a. 2d is the cap engagement groove 1b of the writing instrument 1.
The valve 2i of the cap inner cylinder 2h is
Block 2c.

Therefore, the writing portion 1a of the writing instrument 1 is sealed by the safety cap 2, and the evaporation of the volatile ink from the writing portion 1a is prevented before and surely.

When the safety cap 2 is removed, the cap inner cylinder 2h is pushed by the spring S, the valve portion 2i opens the ventilation hole 2c, and the ventilation passage 2m is opened. Therefore, even if an infant or the like puts the safety cap 2 removed from the writing instrument 1 in his / her mouth and inhales or swallows it, it is possible to avoid suffocation or the like by the air passage 2m in the open state. it can.

Although the safety cap of the writing instrument has been described in the above embodiment, the safety cap of the present invention can be applied to other portable liquid containers and the like.

[Advantage of the Invention] As described above, according to the present invention, the cap outer cylinder having the vent hole in the head portion and the cap outer cylinder are slidably housed in the cap outer cylinder so that the inner cap And a cap inner cylinder having a valve portion for forming a ventilation path with the wall surface and being pushed when the writing tool, the liquid container, or the like is fitted to close the ventilation hole. Since the safety cap is constructed by urging the inner cylinder with the elastic body in the valve opening direction, it moves against the elastic body inside the cap outer cylinder when the writing instrument, liquid container, etc. is fitted to the tip side. The valve portion of the cap inner cylinder closes the vent hole of the cap outer cylinder, and at the same time, the cap inner cylinder seals the tip side of the writing instrument, the liquid container, etc., so that the volatile substance is evaporated from the writing instrument, the liquid container, etc. It can be surely prevented.

Moreover, when the safety cap is removed, the cap inner cylinder moves by the urging force of the elastic body, and the valve portion of the cap inner cylinder opens the vent hole of the cap outer cylinder, so that the space between the cap inner cylinder and the cap outer cylinder is increased. By opening the ventilation passage, even if an infant or the like puts the safety cap in his / her mouth and inhales or swallows it, it is possible to prevent the worst situation such as suffocation.

[Brief description of drawings]

FIG. 1 is a sectional view showing a safety cap according to an embodiment of the present invention in relation to a writing instrument. 1 ... Writing implement, 2 ... Safety cap, 2a ... Cap outer cylinder, 2b ... Head, 2c ... Vent hole, 2d ... Engagement protrusion, 2h ...
… Cap inner cylinder, 2i …… Valve part, 2m …… Ventilation passage, S …… Spring (elastic body).

Claims (2)

[Scope of utility model registration request] 1. A cap outer cylinder removably fitted to the tip of a writing instrument, a liquid container or the like, a vent hole provided in the head of the cap outer cylinder, and an axial slide in the cap outer cylinder. It is movably accommodated, forms an air passage between the inner wall surface of the cap outer cylinder, and when the cap outer cylinder is fitted to the writing implement and the liquid container, the writing part of the writing implement or the mouth of the liquid container is closed. A cap inner cylinder that is hermetically sealed and is pushed in a direction of closing the vent hole; a valve portion that is provided in the cap inner cylinder and that opens and closes the vent hole by axial movement of the cap inner cylinder; A safety cap, such as a writing instrument, provided with an elastic body that constantly urges the cap inner cylinder in the valve opening direction of the valve portion. 2. A cap engagement groove formed on the inner wall surface of the cap outer cylinder on the lower end opening side so as to be disengageably engaged with a cap engagement groove formed on the outer peripheral portion of the tip end of the writing instrument or the mouth side of the liquid container. An engaging protrusion is provided, and a taper portion that expands like a trumpet and is locked to the inside of the engaging protrusion is integrally formed on the lower peripheral wall of the cap inner cylinder. 2. The taper portion is elastically deformable so that the taper portion passes through the engagement protrusion when the cap inner cylinder is inserted and housed in the cap outer cylinder. Safety cap for writing instruments, etc.