JPH029995Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" This invention relates to the overall structure of a water-based ink ballpoint pen, and to explain it more specifically, it aims to improve efficiency in the assembly process of the ballpoint pen, ensure airtightness, The present invention relates to the overall structure of a water-based ink ballpoint pen that takes into consideration practical aspects such as prevention of ink leakage and convenience of use.

``Prior art'' ``Problems to be solved by the invention'' It is a natural desire among those skilled in the art to be able to process the various parts that make up a water-based ink ballpoint pen in a series of automated lines. The big problem was how to achieve this more easily and quickly. In addition, from a practical standpoint, it has been desired to realize a device that exhibits excellent performance with a structure that is as simple as possible.

However, the reality is that the pursuit of efficiency and practicality in these assembly processes is carried out from separate viewpoints. This naturally requires the structure of the ballpoint pen to be simplified when considering workability in the automatic assembly process, and when considering practical convenience and safety, the structure is unavoidable. This can be accepted as a natural result of the current situation where the complexity of the world is unavoidable.

The present invention was developed in view of the state of the prior art as described above, and by comprehensively improving the structure of a water-based ink ballpoint pen, it contributes to the efficiency of the assembly process and is also superior in terms of practicality. The intention is to realize a water-based ink ballpoint pen that is effective.

"Means for Solving the Problem" Therefore, in order to solve this problem, the present patent is concerned with the components of the ballpoint pen, each of which contributes to convenience and safety, as stated in the claims section of the utility model registration. To solve this problem, all the parts configured to do this can be assembled in the axial direction of the ballpoint pen at reasonable locations using press-fitting means.

"Operations" and "Examples" Hereinafter, examples of the present invention will be described in detail, and their operations will be explained.

The water-based ink ballpoint pen B consists of a barrel 1 and a cap 2. The cap 2 is press-fitted so that its annular protrusion a passes over a tapered protrusion b provided on the barrel 1. It is detachably attached to one part of the shaft cylinder.

Attached to the tip of the cap 2 is a cap-shaped color display section 3 colored the same as the color of the ink used in the ballpoint pen. The color display section 3 is attached to the recess 2a at the tip of the cap 2 by press fitting.

Reference numeral 4 denotes a clip, which is attached to the cap 2 by press-fitting its bent portion 4a into a groove 2b formed in the axial direction of the cap 2.

The barrel 1 has openings 1a and 1b formed at both ends, and a ballpoint pen holder 5 is attached to the opening 1a at the tip of the barrel, which has a ball portion 5a that holds a ball and retains ink therein. be.

Here, the ballpoint pen holder 5 is held by a holding member 6, and the holding member 6 is attached by press-fitting into the opening 1a. Of course, it may be attached by. Reference numeral 7 denotes an ink guiding core that guides ink to the ball portion 5a of the ballpoint pen holder 5, and is normally accommodated in the holding hole 5b of the ballpoint pen holder 5, and is handled integrally with the ballpoint pen holder 5.

Reference numeral 8 denotes a hollow inner lid member installed inside the barrel 1, which prevents ink from leaking out of the barrel 1 due to an increase in the air pressure inside the barrel 1 or when the ballpoint pen B itself is dropped vertically. Ventilation hole blocking part 8 to prevent
a, and an ink storage body holding portion 8b that holds an ink storage body 12 (described later) within the barrel 1, and both 8
a and 8b are integrally formed.

This hollow inner lid member 8 is installed in the barrel 1 by press-fitting the outer surface of its ventilation hole blocking portion 8a to the inner surface 1a' of the opening 1a at the tip of the barrel. It is important that a considerable space S be formed within the pore blocking portion 8a. Reference numeral 9 denotes a stepped portion provided on the inner surface 1a' of the shaft cylinder tip opening 1a, which comes into contact with the tip of the vent blocking portion 8a of the hollow inner lid member 8 to restrict its movement. Further, the ink storage body holding portion 8b of the hollow inner lid member 8 is provided with outward grooves 10 and inward grooves 11 on its outer and inner surfaces, respectively.

Therefore, the outward groove 10 ensures communication between the ventilation hole H formed on the side of the tip of the shaft cylinder and the rear end surface 12b of the ink storage body 12, which will be described later.
When holding the ink storage body 12, it is possible to hold it in a preferable manner by appropriately holding it in the mouth. Further, when the ink storage body 12 is inserted last in the automatic assembly process to be described later, the groove serves as an exhaust groove for the compressed air generated in the hollow inner lid member 8.

The ink storage body 12 is formed by impregnating a fiber bundle 13 with ink, and both end surfaces 12a, 1
Except for 2b, the other outer circumferential surfaces are covered with a suitable covering member 14, and one end of the ink guide core 7 described above is embedded from the front end surface 12a of the covering member 14. As described above, the ink storage body 12 is held at its leading end by the ink storage body holding portion 8b of the hollow inner lid member, and at the same time, its rear end surface 12b is brought into contact with the tail plug 15 to hold the shaft cylinder 12. Stably housed within.

The tail plug 15 is bottomed and holds the ink absorber 12 by coming into contact with the rear end surface 12b of the ink absorber at its end. 1b by press-fitting.

15a is an inward protrusion formed at the end of the tail plug 15 that comes into contact with the rear end surface 12b of the ink storage body,
Deformation of the rear end surface 12b of the ink storage body caused by the impact force in the axial direction on the ballpoint pen B itself, that is, the shear fiber bundle 13 constituting the ink storage body 12
This is useful for preventing the phenomenon of displacement of the covering member 14 that covers this.

Reference numeral 15b is a notched groove formed at the end of the tail plug 15, which communicates with the ventilation hole H at the tip of the barrel to enable ventilation into the ink storage body 12. In addition, if the rear end 15c of this tail plug 15 is painted with the same color as the ink used for the ballpoint pen B, it will be easier to use when combined with the presence of the color display section 3 attached to the cap 2 mentioned above. Convenience will further increase.

Now, to explain the case where the water-based ink ballpoint pen according to the present invention is assembled on an automatic assembly line, first, a barrel 1 having openings 1a and 1b at both ends is set, and then a hollow inner lid member is placed inside this barrel 1. 8 is installed. In this case, it does not matter which of the hollow inner lid member 8 or the ballpoint pen holder 5 is attached first, and either one can be attached first, but the important thing here is that in either case, the ballpoint pen holder is mounted on the automatic assembly line. This means that the holder 5 can always keep the ball portion 5a facing upward. This is because the present invention adopts a configuration in which the ballpoint pen holder 5 or its holding member 6 and the hollow inner lid member 8 are attached to the barrel 1 separately and independently without contacting each other. This is because even if parts are mounted with the portion 1a facing upward at all times, there will be no unbalanced pressing force when mounting each part.

Here, we will explain the case where the ballpoint pen holder 5 held by the holding member 6 is attached first, but both 1a and 6 are press-fitted into the outer surface of the holding member 6 and the inner surface 1a'' of the barrel tip opening 1a. Appropriate measures are taken to facilitate mating, and usually a protrusion extending in the axial direction is formed on one of the two, or annular protrusions are formed on both to mesh with each other.

After the ballpoint pen holder 5 is attached, the hollow inner lid member 8 is attached by press-fitting the outer surface of the air hole blocking portion 8a into the inner surface 1a' of the opening 1a. At this time, the hollow inner lid member 8 connects the tip of the ventilation hole blocking portion 8a to the stepped portion 9 of the inner surface 1a' of the opening 1a.
Its forward movement is regulated by bringing it into contact with.

Next, when the ink absorber 12 is inserted into the barrel 1, the end of the ink guide core 7 accommodated in the holding hole 5b of the ballpoint pen holder is buried up to a predetermined position from the front end surface 12a of the ink absorber.

Compressed air generated when inserting the ink storage body 12 is exhausted from the inward groove 11 of the ink storage body holding portion 8b, and the hollow inner lid member 8
Insertion inside is smooth. Further, the ink storage body 12 is held in the hollow inner lid member 8 in a preferable manner such that its tip portion is appropriately held in the ink storage body holding portion 8b.

After going through the above steps, the tail plug 15 is attached to the rear end opening 1b of the barrel, and the barrel 1 portion is completed. The end of the tail plug 15 comes into contact with the rear end surface 12b of the ink storage body to hold the ink storage body 12 within the shaft cylinder 1 via the hollow inner lid member 8. Attachment of this tail plug 15 is also carried out by means of a press fit.

In addition, an inward protrusion 15a provided at the end of the tail plug 15
As mentioned above, this helps ensure the stable presence of the ink storage body 12 within the shaft cylinder 1. The two parts of the cap are attached to the completed first part of the barrel by press-fitting, and the water-based ink ballpoint pen of the present invention is completed.

``Effect of the invention'' As described above, the present invention is to attach all structural parts that have unique effects to the water-based ink ballpoint pen in the axial direction and at reasonable locations by press-fitting. With this simple structure, we have created a water-based ink ballpoint pen that is extremely effective in adapting to automatic assembly lines and has excellent benefits in terms of ease of use and safety. Now you can get it easily.

[Brief explanation of drawings]

Figure 1 is a partially omitted side cross-sectional view illustrating a water-based ink ballpoint pen implementing the present invention, and Figure 2 is Figure 1A.
- Enlarged side sectional view of the hollow inner lid member in A, 3rd
The figure is an enlarged side sectional view of the tail plug in FIG. 1 B-B,
FIG. 4 is a partially omitted exploded view illustrating the mutual relationship of each component. 1...Shaft tube, 1a...Shaft tube tip opening, 1b...
... Rear end opening of barrel, 2... Cap, 3... Ink color display section, 5... Ballpoint pen holder, 5a...
...Ball portion, 6...Holding member, 7...Ink guide core, 8...Hollow inner lid member, 8a...Vent hole blocking part, 8b...Ink storage body holding part, 10...Outward groove, 11 ... Inward groove, 12 ... Ink absorber, 1
5...Tail plug, 15a...Inward protrusion, 15b...
Notched groove.

Claims (1)

[Scope of utility model registration request] A vent hole that supplies ink from the ink storage body housed in the barrel to the ball portion of the ballpoint pen holder attached to the tip of the barrel via the ink guide core, and that communicates with the ink storage body on the side of the tip of the barrel. In the water-based ink ballpoint pen, which has a cap removably attached to the tip of the barrel, openings 1a and 1b are formed at both ends of the barrel 1, and ink is inserted into the opening 1a at the tip of the barrel. Occlusion body 12
A ballpoint pen holder 5 equipped with an ink guiding core 7 reaching inside is attached by press-fitting, and an ink storage body holding part 8b and a ventilation hole blocking part 8a are attached.
A hollow inner lid member 8, which has an outward groove 10 and an inward groove 11 in the ink storage body holding part 8b, is press-fitted with the outer surface of the vent blocking part 8a on the inner surface of the shaft cylinder tip opening 1a. In addition, the ink storage body 1 is installed in the barrel 1 at the rear end opening 1b of the barrel.
The ink storage body 12 is brought into contact with the rear end surface of the shaft cylinder 1.
A tail plug 15 having an inward protrusion 15a to be held inside is attached by press-fitting, and a cap 2 having an ink color display section 3 at the tip is detachably attached to the shaft cylinder 1 by press-fitting. A water-based ink ballpoint pen.