JPH0546957Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a cap press water-based ballpoint pen that is advantageous for long-term storage.

[Problems to be solved by conventional techniques and ideas]

Conventional capless water-based ballpoint pens are constructed so that the amount of ink lost due to volatilization is extremely small compared to water-based ballpoint pens with caps, and the loss of ink during the period of use does not pose a practical problem. However, even when such a water-based ballpoint pen is left unused for a long period of time, ink evaporates from the pen tip and air holes, resulting in a shortened writing life. Therefore, measures are taken such as separating the outer shaft and the refill stored inside the outer shaft and packaging only the refill separately while the refill is left on the shelf until it reaches the consumer. It has been difficult to provide inexpensive products to consumers due to the cost of packaging. Furthermore, when using the refill, the refill must be removed from the packaging bag and installed inside the outer shaft, which is extremely troublesome. The purpose of the present invention is to provide a cap press water-based ballpoint pen that solves these problems.

[Means for solving problems]

The cap press water-based ballpoint pen of the present invention, which was devised to achieve the above object, has a writing part of the refill that can be freely retracted from the tip opening of the outer shaft, and the refill with the storage cap fitted can be used as is. It is designed so that it can be stored inside the outer shaft, and when the writing part of the re-feel protrudes from the tip opening of the outer shaft, the storage cap fitted on the re-feel also protrudes from the tip opening of the outer shaft and can be removed from the re-feel. The storage cap is characterized in that the dimensions of the storage cap are set appropriately.

〔Example〕

The figures show an embodiment of the present invention, with FIG. 1 showing the state of storage and FIG. 2 showing the state of use. Reference numeral 1 designates an outer shaft, which has an open rear end, has a stepped portion 3 on the inner surface of the tip opening 2, has a clip 4 integrally protruding from the side surface near the rear end, and has a lower surface of the front end of the clip 4. A ball part 5 is formed on the ball part 5, and an engagement step part 6 is formed on the ball part 5, and the side surface facing the clip 4 extends from a slightly forward position of the ball part 5 to the vicinity of the attachment base 7 of the clip 4. A window hole 8 that is long in the axial direction is provided. Reference numeral 9 designates a water-based ballpoint pen refill, which has a writing part 10 at the front end, a tapered shaft part 11 behind it, a small diameter shaft part 12 and a medium diameter shaft part 13 behind it, and a writing part 10 behind it. It has a large diameter shaft part 14, an air hole 15 is bored in the tapered shaft part 11, and an engagement groove 16 in the circumferential direction is formed on the outer surface of the boundary between the small diameter shaft part 12 and the medium diameter shaft part 13. It has a stepped portion 17 at the boundary between the medium diameter shaft portion 13 and the large diameter shaft portion 14, and an engagement protrusion 18 is provided on the side surface at a position slightly forward from the rear end of the large diameter shaft portion 14.
The total length is set longer than the total length of the outer shaft 1.
The re-feel 9 is housed in such a state that its engagement protrusion 18 is fitted into the window hole 8 so that it can move freely in the axial direction, and its rear end protrudes a required length from the rear end opening of the outer shaft 1. 18 is retracted until it abuts the rear edge of the window hole 8, and the writing part 10 at the front end is located behind the tip opening 2 of the outer shaft 1, and the engaging protrusion 18 engages with the ball part 5 of the clip 4. When the engagement groove 16 is moved forward from the writing part 10 until it is located in front of the joint part 6,
The engaging protrusion 1 is arranged so that the vicinity of the front end of the rear medium-diameter shaft portion 13 is located forward of the tip opening 2 of the outer shaft 1.
8 is set appropriately. A coil spring 19 is interposed between the step 3 on the inner surface of the tip end of the outer shaft 1 and the step 17 on the outer surface of the reel 9, and urges the reel 9 rearward. Therefore, the engagement protrusion 18 of the re-feel 9 engages with the engagement step 6 of the clip ball portion 5.
In the state where the reel 9 is not engaged with the reel 9, the refill 9 moves back until the engagement protrusion 18 abuts the rear edge of the window hole 8, and the writing portion 10 enters into the interior of the outer shaft 1. Reference numeral 20 denotes a storage cap, which has a constant outer diameter and is set slightly smaller than the inner diameter of the tip opening 2 of the outer shaft 1, and has an engaging protrusion 21 on the inner surface of the opening edge that can be elastically deformed to some extent in the radial direction. The inner diameter is set to an appropriate value for airtight contact with the small diameter shaft portion 12 of the reel 9, and the length in the axial direction is set such that the engaging protrusion 21 fits into the engaging groove 16 to attach the reel 9 to the reel 9. The top end surface 22 of the re-feel 9 is dimensioned to slightly protrude forward from the tip edge of the outer shaft 1 when the re-feel 9 is at the retraction limit inside the outer shaft 1.

In the above embodiment, the writing part 10 of the refill 9 is made to protrude from the tip opening 2 of the outer shaft 1 by a knock operation, but the mechanism for feeding out the refill 9 is free.

[Action and effect]

As shown in FIG. 1, in a stored state, the refill 9 is housed inside the outer shaft 1 and is fitted with a storage cap 20. Therefore, even if the refill 9 is left for a long period of time, volatilization of ink from the writing section 10 and the air hole 15 of the refill 9 can be prevented. This has the effect of eliminating the need for additional packaging, reducing the cost required for packaging, and making it possible to supply inexpensive products. In addition, when using the refill, simply push the writing part of the refill out of the outer shaft tip opening, and the storage cap will also stick out at the same time, so you can immediately remove the storage cap and start writing. If you take out the refill from the reel and then install it inside the outer shaft, you can save time and effort and greatly simplify the work.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, in which the first figure is a longitudinal sectional view showing the state of storage, and the second figure is a longitudinal sectional view showing the state of use. 1...Outer shaft, 2...Tip opening, 3...Step, 4...
...Clip, 5...Ball part, 6...Engagement stepped part, 7...
...Mounting base, 8...Window hole, 9...Refill, 1
0...Writing part, 11...Tapered shaft part, 12...Small diameter shaft part, 13...Medium diameter shaft part, 14...Large diameter shaft part,
15...Air hole, 16...Engagement groove, 17...Step, 18...Engagement protrusion, 19...Coil spring, 2
0... Storage cap, 21... Engaging protrusion, 22
...Apical surface.

Claims (1)

[Scope of utility model registration request] The writing part of the refill can be moved in and out of the tip of the outer shaft, and the refill with the storage cap fitted can be stored inside the outer shaft as it is. A cap press water-based ballpoint pen characterized in that the dimensions of the storage cap are appropriately set so that when the storage cap is inserted into the refeel when the cap is projected from the end opening, the storage cap can also be removed from the outer shaft tip opening together with the refill. .