JP2002178681A - Device for opening/closing airtight part of cap-less marker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for opening/closing the airtight part of a cap-less marker which has a smaller number of parts as compared with a conventional device, can be assembled easily, and is manufactured at a low cost. SOLUTION: A mechanism in which thin plate spring bodies (corresponding to thin plate members) 28 having holes 28a are housed in a shaft part 10 and a front shaft part 18 slidably on a groove 30 to open/close an open hole 16 at the tip of the front shaft part 18, and the spring bodies 28 are interlocked with the knock mechanism of a wiring part 12 is provided. An airtight opening/ closing device in which by the knocking operation of the knock part, the spring bodies 28 are interlocked with the advance of the writing part 12 to open the open hole 16 by the holes 28a and interlocked with the retreat of the writing part 12 to close the open hole 16 by parts having no holes 28a of the spring bodies 28 is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a capless marker in which a writing portion is accommodated in a shaft portion so as to be movable forward and backward by a knocking operation, and a writing tip of the writing portion advances from an open portion at the tip portion of the shaft portion to enable writing. And an airtight part opening and closing device.

[0002]

2. Description of the Related Art Conventionally, various types of writing tools, particularly water-based and oil-based markers, have been used. However, when left for a long period of time, the ink dries at the tip of the writing section, making it difficult to write next time. When not in use, the tip of the writing section is closed with a cap to prevent drying. However, since it is troublesome to remove or attach the cap every time it is used, a knock mechanism is adopted to open the tip of the shaft part during use and let the tip of the writing part protrude from the open part, while not using Various mechanisms for accommodating the writing portion in the shaft portion when necessary and closing the opening portion have been proposed.

For example, in Japanese Patent Application Laid-Open No. 1-2281999, a seal chamber is provided in a writing instrument main body, a rotatable seal lid for sealing the seal chamber, and the seal lid are opened and closed in conjunction with the advance and retreat of the writing body. A capless writing implement has been proposed which has a thread-like member and opens and closes a seal lid in conjunction with the movement of a writing body.

[0004]

However, in the conventional capless writing instrument, the number of parts is large, and
There has been a problem that mounting and assembling the thread-like members are complicated and work load.

The present invention has been made in view of the above-mentioned problems of the prior art, and has as its object to provide a device for opening and closing a hermetic portion of a capless marker which has a smaller number of parts than the conventional technology, is easy to assemble, and does not cost much. I do.

[0006]

The present invention has the following arrangement to achieve the above object.

According to the present invention, there is provided a capless marker in which a writing portion is accommodated in a shaft portion so as to be able to move forward and backward by a knocking operation, and a writing tip of the writing portion advances from an open portion at a tip portion of the shaft portion to enable writing. A thin plate member having a hole inside the tip is slidably accommodated, and the thin plate member is housed so as to be able to open and close the opening at the tip of the shaft portion. By the knocking operation of the mechanism, the thin plate member opens the opening with a hole in conjunction with the advancement of the writing portion, while closing the opening in conjunction with the retreat of the writing portion. It is a device for opening and closing a hermetic part of a capless marker.

According to the present invention, the open end of the shaft portion is opened and closed by the reciprocating operation of the thin plate member. Therefore, the opening and closing mechanism for maintaining the airtightness of the shaft end portion has a small number of parts, is easy to assemble, and does not cost much. Can be realized as follows.

In the present invention, the thin plate member can be made of an elastic plate material having a thickness of 0.05 to 0.15. As the thin plate member, a metal thin plate material (SUS plate material) having a further rustproof property is preferable.

It is preferable that a groove corresponding to the width of the thin plate member is formed in a sliding portion on the inner surface of the shaft portion on which the thin plate member slides, and the thin plate member is slidably fitted in the groove. It is. Thus, the opening and closing of the open end portion can be reliably performed without the thin plate member moving right and left in the width direction.

Preferably, an elastic material is fitted inside the periphery of the opening at the tip of the shaft to improve the airtightness. Thereby, confidentiality can be surely improved.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is an overall explanatory view of a capless marker applied to an embodiment of the present invention, FIG. 2 is an explanatory view of an airtight portion opening / closing device, and FIG. 3 is an explanatory view of a thin plate member.

As shown in FIG. 1, the capless marker has a writing portion 12 housed in a shaft portion 10 such that the writing portion 12 can be moved forward and backward by a knocking operation.
This is a capless marker that can be written on by protruding from the open hole 16 of the tip shaft portion 18 fitted and fixed to the tip.

More specifically, in the capless marker, a warhead-shaped front shaft portion 18 having an open hole 16 formed at the front end is fitted to the front end portion of the hollow cylindrical shaft portion 10 in the axial direction. Is fixed. In the writing unit 12, the writing unit 12 body accommodated in the shaft unit 10 is
It has a large diameter structure incorporating 2a, and a small diameter writing tip 14 is provided continuously to the tip of the main body. A pen core 14a made of a fiber core is fixed to the writing tip 14 with its tip exposed and its rear end facing the inside of the ink tank 12a. Further, the writing portion 12 is urged rearward by the elastic force of a spring 20 provided between the inner surface portion of the shaft portion 10 and the outer surface portion of the writing portion 12, and is accommodated in the shaft portion 10 so as to be able to move forward and backward. Have been. The tail plug portion 22 accommodated in the rear end opening of the shaft portion 10 is pushed and knocked. The knock mechanism according to the embodiment includes a shaft rear end 10b.
Locking projections 26 on the inner surface of the tail plug 22
Is locked, the writing position where the writing portion 12 is advanced by knocking is positioned, while the tail plug portion 22 contacts the locking portion 24 at the non-writing position where the writing portion 12 is retracted and the writing portion 12 is retracted. The contact writing section 12 is positioned. In addition, both ends of the locking portion 24 are loosely guided so as to be able to be guided in the vertical groove 22a of the tail plug portion 22.

In the capless marker of the embodiment, as shown in FIGS. 2 and 3, a thin plate spring body (corresponding to a thin plate member) 28 having a hole 28a inside the shaft portion 10 and the front shaft portion 18 is formed on the groove 30. Is slidable, and the thin leaf spring body 28 is
The opening portion 16 at the end 8 is accommodated so as to open and close, and the knocking mechanism of the writing portion 12 and the thin plate spring body 28 are interlocked. By the knocking operation of the knock mechanism, the thin leaf spring body 28 opens the open hole 16 at the hole 28a in conjunction with the advancement of the writing section 12, while the thin leaf spring body 28 opens the hole 28a of the thin leaf spring body 28 in conjunction with the retreat of the writing section 12. There is an airtight part opening / closing device that closes the open hole 16 at a portion that does not exist.

According to this embodiment, since the tip of the front shaft portion 18 is opened and closed by the reciprocating operation of the thin leaf spring body 28, the number of parts is small, the assembly is easy, and the cost is not increased.

In the embodiment, the thin leaf spring 2
Reference numeral 8 denotes a plate made of various materials such as a metal material and a resin material, and is preferably made of, for example, a plate having a thickness of 0.05 to 0.15 which is thinner than the wall thickness of the front shaft portion 18 and has elasticity. is there. The thin plate spring body 28 is preferably made of a thin metal plate having rust resistance (such as a SUS plate). As shown in FIG. 3, the main body 28b of the thin plate spring body 28 is a band-like body having substantially the same width.
a is formed, and an annular ring portion 28c fitted on the outer periphery of the writing portion 12 is formed continuously at the other end. Since the annular ring portion 28c is bent at a right angle to the thin plate spring body 28 main body and fitted and fixed to the outer periphery of the writing portion 12, it is fixed.
The thin plate spring body 28 moves forward and backward in conjunction with the forward and backward movement of the writing unit 12, and the hole 28 a coincides with or comes off the opening 16.

Further, the tip shaft portion 1 on which the thin plate spring body 28 slides.
A groove 30 corresponding to the width of the thin plate spring body 28 is formed in a sliding portion of the inner surface portion 8, and the thin plate spring body is slidably fitted in the groove 30.

As shown in FIG. 3, it is preferable to improve the airtightness by fitting an elastic material 32 such as a rubber packing or an O-ring into the periphery of the open portion 16 at the tip of the shaft portion 10.

[0021]

As described above, according to the present invention, the open end of the shaft is opened and closed by the reciprocating operation of the thin plate member. Therefore, the opening and closing mechanism for maintaining the airtightness of the shaft end has a small number of parts. It is easy to assemble and can be implemented without cost.

Further, a groove corresponding to the width of the thin plate member is formed in a sliding portion on the inner surface of the shaft portion on which the thin plate member slides, and the thin plate member is slidably fitted in the groove. If
The opening and closing of the open end portion can be reliably performed without the thin plate member being displaced right and left in the width direction.

Further, an airtightness can be improved by fitting an elastic material inside the periphery of the open portion at the tip of the shaft portion.

[Brief description of the drawings]

FIGS. 1A and 1B are explanatory views of the entire cross-sectional view of a capless marker applied to an embodiment of the present invention when the writing portion is stored and when the writing portion protrudes.

FIGS. 2A and 2B are explanatory views of a hermetic part opening / closing device, wherein FIG. 2A is a longitudinal sectional view of a tip shaft, FIG. 2B is a sectional view taken along line AA, and FIG. It is.

FIGS. 3 (a) and 3 (b) are explanatory views of a thin plate member in a side view and developed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Shaft part 12 Writing part 12a Ink tank 14 Writing tip 16 Open part 18 Front shaft part 28 Thin leaf spring body 28a Hole of thin leaf spring body 30 Groove

Claims (4)

[Claims] 1. A capless marker in which a writing portion is housed in a shaft portion so as to be able to move forward and backward by a knocking operation, and a writing tip of the writing portion advances from an open portion at a tip portion of the shaft portion to enable writing. A thin plate member having a hole therein is slidably accommodated, and the thin plate member is housed so as to be able to open and close an open portion at a tip of a shaft portion. A knock mechanism of a writing portion and a thin plate member are interlocked. By the knocking operation, the thin plate member opens the open portion with a hole in conjunction with the advancement of the writing portion, while closing the open portion in conjunction with the retreat of the writing portion. Airtight part opening and closing device of the marker. 2. The thin plate member has an elastic thickness of 0.05.
The opening / closing device for a hermetic part of a capless marker according to claim 1, wherein the opening / closing device is made of a plate material having a thickness of 0.15 to 0.15. 3. A groove corresponding to the width of the thin plate member is formed in a sliding portion on the inner surface of the shaft portion on which the thin plate member slides, and the thin plate member is slidably fitted in the groove. The opening / closing device for an airtight portion of a capless marker according to claim 1 or 2. 4. The opening / closing device for an airtight portion of a capless marker according to claim 1, wherein an elastic material is fitted inside the periphery of the open portion at the end of the shaft portion to improve airtightness.