JPH0546958Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) The present invention relates to improving the shelf life of a water-based ballpoint pen made of a cap-press water-based ballpoint pen in which the tip of the refill is retractable from the tip of the barrel.

(Conventional technology) Recently, with the development of non-drying technology for water-based ballpoint pens, many Cat Press water-based ballpoint pens have become available on the market, but even these non-dry ballpoint pens can suffer from re-reel nibs if left for a long period of time. Since deterioration in performance due to ink volatilization from the air holes is inevitable, in order to preserve the product for a long period of time until it reaches the consumer, refills are generally covered with a seal cap or wrapped in aluminum foil and packaged with a barrel. were often sold separately in stores.

(Problems to be Solved by the Invention) If the refill is separated from the barrel and packaged as a single item in this way, it has been difficult to provide a cap-press water-based ballpoint pen to consumers at a low price due to the cost. The present invention eliminates the need to separate the refill from the barrel and package it separately, which means that the refill can be stored for a long time by preventing ink from volatilizing from the pen tip or air hole even if the refill is left attached to the barrel for a long period of time. The purpose of the present invention is to provide a water-based ballpoint pen that is excellent in quality and inexpensive.

(Means for Solving the Problems) The present invention provides a refeel with a seal body that covers the tip of the refeel and a cap or plug that covers the air hole provided at the rear end of the refeel. The above object is achieved by providing a cap press water-based ballpoint pen, which is characterized by having a barrel attached to the barrel.

(Example) The illustrated embodiment of the present invention has a pen tip at the tip.
A tail plug 2 is fitted to the rear end, an air hole 3 is provided in the tail plug 2, and a protrusion 4 is provided on the side surface to form a re-feel 6 with the rear end surface of the tail plug 2 serving as a notch portion 5. In addition, a clip 7 is provided on the side surface, a locking step 9 is formed on the clamping projection 8 on the inner surface of the tip end of the clip, and a locking step 9 is formed on the side facing the clipping projection 8 before and after the locking step 9. A shaft tube 11 is formed with a window hole 10 extending over the shaft tube 11 so that the clamping protrusion 8 of the clip 7 can be elastically displaced, and the protrusion 4 on the side surface of the above-mentioned re-feel 6 protrudes through the window hole 10 of the shaft tube 11. At the same time, the shaft cylinder 11 is inserted so that the rear end notch portion 5 protrudes from the rear end opening 12 of the shaft cylinder 11.
At the same time, a coil spring 15 is interposed between the front end outer surface step part 13 of the refill 6 and the front end inner surface step part 14 of the shaft cylinder 11 to bias the refill 6 rearward. A seal body 16 that covers the pen tip 1 of the re-feel 6 and a plug body 17 that covers the air hole 3 of the tail plug 2 at the rear end of the re-feel 6 are fitted respectively when the nib 1 is recessed into the barrel. It is. The outer diameter of the plug 17 is set larger than the inner diameter of the rear end port 12 of the shaft cylinder 6.
When the front edge of the stopper 17 is moved forward slightly, the front edge of the stopper 17 will be moved forward.
It is configured to abut against the rear end edge and prevent the nib 1 of the re-feel 6 from protruding from the tip opening 18 of the barrel. Therefore, when in use, the stopper 17 is removed from the refill 6 and the notch 5 of the refill 6 is pressed. When the re-feel 6 moves forward, the protrusion 4 on its side moves forward within the window hole 10 and comes into contact with the clamping protrusion 8 of the clip 7, elastically displacing the clamping protrusion 8, pushing it upward and passing below it. is engaged with the locking step portion 9 and fixed. At this time, the size of the pen tip 1 of the refill 6 is set so that it protrudes from the tip opening 18 of the barrel 11. Also, refeel 6 nib 1
The outer diameter of the seal body 16 fitted therein is also set to allow it to pass through the shaft cylinder tip opening 18. When the pen tip 1 of the re-feel 6 protrudes from the barrel tip opening 18, writing is enabled by removing the seal body 16 from the pen tip 1. Incidentally, in order to sink the pen tip 1 into the inside of the barrel, the rear end pressing piece 19 of the clip 7 is pressed downward against the leaf spring 20, and conversely, the clamping protrusion 8 at the tip of the clip floats. The locking step 9 and the re-feel 6
What is necessary is to release the engaged state of the protrusion 4. That is, the refill 6 moves backward due to the restoring force of the coil spring 15, and the pen tip 1 is recessed into the barrel.

(Operations and Effects) As described above, the present invention allows the refeel to be pivoted while the seal body covering the tip of the refeel and the cap or plug body covering the air hole provided at the rear end of the refeel are respectively fitted. Since it is attached to the barrel, it is possible to prevent ink from volatilizing from the pen tip or air hole while the refeel is attached to the barrel, without having to separate the refeel from the barrel and package it separately.
Therefore, it is possible to provide a cap press water-based ballpoint pen that has excellent storage stability and is inexpensive. In addition, if the stopper is configured as in the example, even if the notch part receives an impact such as being dropped during storage, the pen tip will not protrude from the tip opening of the barrel, and there will be no problem such as poor writing due to an accident with the pen tip. Does not occur.

[Brief explanation of the drawing]

The drawing is a sectional view showing a state of preservation of an embodiment of the present invention. 1... Pen tip, 2... Tail plug, 3... Air hole, 4
... protrusion, 5 ... notch part, 6 ... refill,
7... Clip, 8... Clamping convex portion, 9... Locking stepped portion, 10... Window hole, 11... Shaft tube, 12... Rear end opening, 13... Outer surface stepped portion, 14... Inner surface Step part, 15
... Coil spring, 16 ... Seal body, 17 ... Plug body, 18 ... Tip opening, 19 ... Pressing piece part, 20 ...
...Leaf spring.

Claims (1)

[Scope of utility model registration request] This cat press water-based ballpoint pen is characterized in that the refill is attached to the barrel with a seal body covering the tip of the refill and a cap or plug covering the air hole at the rear end of the refill fitted on each of them.