CN100335295C

CN100335295C - Ball point pen

Info

Publication number: CN100335295C
Application number: CNB031038271A
Authority: CN
Inventors: 中岛淳
Original assignee: Mitsubishi Pencil Co Ltd
Current assignee: Mitsubishi Pencil Co Ltd
Priority date: 2002-02-12
Filing date: 2003-02-12
Publication date: 2007-09-05
Anticipated expiration: 2023-02-12
Also published as: TWI265872B; TW200302785A; JP2003231387A; CN1438128A

Abstract

To provide a ball-point pen capable of suppressing the backlash of a pen point and capable of obtaining a good writing feeling. The ball-point pen comprises a ball-point pen tip 4 having a writing ball 13 held to the leading end thereof in a rotatable manner, a shaft cylinder 1 having a through-hole 14 formed to the leading end thereof to house an ink housing part 17 and constituted so as to protrude the ball-point pen tip 4 from the through-hole 14 and a resin joint for connecting the ball-point pen tip 4 and the ink housing part 17 and having contact parts (5c and 6e) coming into contact with an ink guide hole 12 for guiding ink to the ball-point pen tip 4 and the leading end of the shaft cylinder 1. The contact parts are formed at a plurality of places in an axial direction.

Description

Ball pen

Technical field

The present invention relates to a kind of ball pen that ball pen is housed in its shaft cylinder.

Background technology

As suppressing the method that nib occurs recoiling owing to the gap between ball-point pen tip and the Qian Zui hole, Japanese utility model application openly flat-6-83376 has disclosed a kind of like this structure, wherein provide a kind of by mouthpiece with the assembling of a plurality of one joints that the elastically deformable resin moulded parts of the taper rib of longitudinal extension forms on its outer peripheral face and screw thread, thereby the longitudinal rib of the step portion click joint in mouthpiece, the gap that prevents nib thus.

But, long or along axial direction (in the past backward) when longer, nib is probably owing to the distortion of blank area self is swung when joint length.

Therefore in addition, when joint was formed by a plurality of parts, the auxiliary section branch between these blank areas sent the sound of creak, thereby made nib shake, and had reduced the sensation of writing during use.

Summary of the invention

The present invention proposes in view of the above problems, so one object of the present invention is to provide a kind of and can makes and write comfortable ball pen by suppressing the retreating of nib (backlash).

Be used to realize that the ball pen of the present invention of above-mentioned purpose comprises: the ball-point pen tip that writing ball is housed rotationally at its front end place; Shaft cylinder, the ball-point pen tip that it has the through hole that is formed on its front end place and is combined with ink storing tube and stretches out from through hole; And the joint that forms by resin, it links together ball-point pen tip and ink storing tube and has and is used for the lead ink pipeline of ball-point pen tip and in abutting connection with adjacency (abutment) structure of the leading section of shaft cylinder of ink, it is characterized in that described abutment structure forms in a plurality of positions along axial direction.

Phrase " in a plurality of positions along axial direction " is illustrated in along the diverse location place of axial direction and is formed with a plurality of adjacency.

Joint is formed by integrally moulded that makes with the elastically deformable resin or a plurality of parts of being combined together.

Because the diverse location place that this layout makes nib to change on axial (in the past backward) direction is fixed, so can prevent that nib is owing to the distortion of joint component retreats.In the present invention, " front " expression ball-point pen tip side, and " back " expression side relative with the ball-point pen tip side.

Further preferably, joint is by constituting near second joint that is provided with later near first joint that is provided with previously with along axial direction along axial direction, valve chamber is formed between first and second joints and ball valve is housed therein, and its upper ball valve can adjacency ball seat be formed on around the ink pipeline of second joint, and abutment structure forms on each of first and second joints.

Be divided in the situation of a plurality of parts at joint, nib can be owing to the gap of the junction between joint component is shaken, perhaps when leaking anti-locking mechanism backward and be arranged between the joint component, joint design is elongated along axial (in the past backward) direction, and this can cause writing during use the sensation variation.Above structure make its can prevent this retreat and provide write comfortableness.

Further preferably, abutment structure is made of the longitudinal rib along axial direction.What contact with the fore-end of shaft cylinder is big more in abutting connection with area, and then the deflection of abutment structure is just big more, and it is also big more to make this abutment structure be out of shape needed power.Therefore, the replacing of ball pen needs time and work, perhaps such situation can occur, and wherein mouthpiece can not be fixed in correct mode, thereby makes ball pen shake.

Above-mentioned layout of the present invention makes it possible to reduce and makes abutment structure be out of shape needed power, therefore can be easy to carry out the replacing of ball pen when can correctly finishing refill for ball-point pen fixing.Also have, use rib to guarantee enough ventilations.

In addition, preferably each longitudinal rib has pyramidal structure, and its height diminishes near the front with respect to axial direction.

This pyramidal structure is easy to eliminate the influence that size in the axial direction rises and falls.

Description of drawings

Fig. 1 is the longitudinal plane view of first embodiment of the invention;

Fig. 2 is the longitudinal plane view of the critical piece around the ball-point pen tip of first embodiment shown in Fig. 1;

Fig. 3 is the longitudinal plane view of the ball-point pen tip critical piece on every side of second embodiment of the invention;

Fig. 4 is the longitudinal plane view of the ball-point pen tip critical piece on every side of third embodiment of the invention.

The specific embodiment

In Fig. 1,2,3 and 4, demonstrate embodiment of the present invention.

At first with reference to Fig. 1, ball pen of the present invention comprises that the outer tube with shaft-like cylinder form 16, the screw thread of its front and back end opening are assemblied in mouthpiece 2 on the front end of outer tube 16 and the ball pen 3 that is contained in outer tube 16 the insides.In this embodiment, the pen container shown in 1 is made of mouthpiece 2 and outer tube 16.Here, mouthpiece 2 needn't form independent parts, but can form with outer tube 16.

Pen container 1 has air vent or ventilation slot, and it is to pass pen container 1 and lead to inner air vent or form groove by the office, threaded portion of fixing mouthpiece 2 thereon and form by locating to get out one in position.Air vent that communicates with the inside of pen container of formation on the tail plug 12 that merges the (not shown) place, rear end that is fixed on outer tube 16 can also be press-fitted.For the method for fixed interface pipe 2 thus, mouthpiece can interference fit and fixing, and is not necessarily limited to threaded engagement.

Though can use various types of inks, thus in ink storing tube 8, store the ink 9 with thixotropic behavior promptly when static, have high viscosity and writing during viscosity reduce the ink that can flow out owing to the rotation of ball.Rear end at ink storing tube is equipped with an oily ink follower 10, and it contacts with ink surface and follows ink surface and move when consuming ink.This ink storing tube 8 can be formed by the transparent PP resin moulded parts that for example can suppress the ink volatilization.

The longitudinal plane view of Fig. 2 critical piece of ball-point pen tip in first embodiment that integrally moulded joint is used in as shown in Figure 1 the time.

Mouthpiece 2 is made of metal and has the conical in shape of its front and back end opening, and its inner surface is formed with ring-shaped step 2a, and this step diameter near the front time diminishes.Cast (pin type) ball-point pen tip 4 interference fits and on joint 5.Another end of joint 5 is installed on the ink storing tube 8.In this position, fitting flange 5a is in abutting connection with the front end of outer tube 16, thereby joint will can not move backward.Here, joint 5 forms by the synthetic resin of elastically deformable is molded.Mouthpiece 2 also can be formed by resin.

When mouthpiece 2 threaded engagement are on outer tube 16, the aft section of the interior step 2a of mouthpiece 2 in abutting connection with and interlock formation on the periphery of the aft section that is positioned at joint 5 as the landing edge back rib 5b of abutment structure, thereby it highly diminishes or they attenuate near the front time for they.Simultaneously, the previous section of the interior step 2a of mouthpiece 2 in abutting connection with and interlock the landing edge front rib 5c that forms as abutment structure on the periphery of the previous section that is positioned at described joint, thereby it highly diminishes or they attenuate near the front time for they.In this embodiment, locate though abutment structure is arranged in a plurality of positions (two positions), with respect to one of axial direction in front and another in the back, they can be arranged on plural position.Above-mentioned layout makes and to be easy to prevent move back and forth, and makes it to provide to write comfortableness.In this accompanying drawing, 13 expression ink pipelines, 14 expression writing balls, and 15 expression through holes.

Fig. 3 is the longitudinal plane view of the ball-point pen tip critical piece on every side of second embodiment, and its center tap is made of two parts that are assembled together mutually.

Leak backward the anti-locking mechanism except joint forms and be provided with ink by two components, this embodiment is identical with first embodiment.

Cast (pin type) ball-point pen tip 4 interference fits and being fixed on first joint 6.This first joint 6 has first joint assembling pipe 6a and is fixed on second joint 7 by this assembling pipe in its aft section.In this position, the first fitting flange 6d is in connection with the front end of second joint 7, thereby first joint will can not move backward.Second joint 7 also is fixed on the ink storing tube 8.Also have in this situation, the second fitting flange 7d is in connection with the front end of outer tube 16, thereby second joint 7 will not move backward.Here, first joint 6 and second joint 7 all are to form by the synthetic resin of elastically deformable is molded.Mouthpiece 2 also can be formed by resin.

The valve chamber 7b that is holding ball valve 11 is arranged between first joint 6 and second joint 7, and the rear end at first joint 6 is formed with otch 6b simultaneously.Writing during the state or when ball-point pen tip 4 was provided with, ball valve 11 contacted with first joint 6 down, ink is by flowing to ball-point pen tip 4 by otch 6b in the gap that the rear end of first joint 6 forms simultaneously.When ball-point pen tip 4 towards last setting, ball valve 11 contact with the ball seat 7c of second joint, 7 inside with the sealing ink channel.Therefore, if upwards write, then there is not ink can move to the back of pen core.Therefore, can prevent to leak backward etc.

When mouthpiece 2 screw threads are fixed on the outer tube 16, the aft section of the interior step 2a of mouthpiece 2 the perimeter sides of second joint 7 in abutting connection with and the second joint longitudinal rib 7e that forms as abutment structure of interlock, thereby they highly shorten near the front time or they attenuate.Simultaneously, the previous section of the interior step of mouthpiece 2 the perimeter sides of first joint 6 in abutting connection with and the first joint longitudinal rib 6c that forms as abutment structure of interlock, thereby they highly shorten near the front time or they attenuate.Above-mentioned layout makes and is easy to prevent that the office, auxiliary section of two-piece connector from occurring moving back and forth and can providing writing comfortableness.

In the 3rd embodiment, the first joint longitudinal rib 6c that extends on the periphery avris of first joint 6 has uniform height along axial direction, thus these ribs 6c in mouthpiece 2 in connection with the inner surface of through hole 15 with non-stepped profile.Other structure is identical with second embodiment among Fig. 3.Also have in this case, can be easy to prevent move back and forth and provide write comfortableness.In this embodiment, the layout of these ribs can change from front to back.Specifically, the longitudinal rib with even height can be located on second joint 7, and the taper longitudinal rib can be formed on first joint 6.Perhaps, place, front and the longitudinal rib on second joint 7 at first joint 6 can have uniform height.

As mentioned above, can provide a kind of ball pen according to the present invention, it can improve by the reciprocating motion that is suppressed at the ball-point pen tip place and writes comfortableness.

Claims

1. ball pen, it comprises:

Ball-point pen tip, it rotatably is equipped with writing ball at its front end place;

Shaft cylinder, it has through hole that forms at its front end place and the ball-point pen tip that ink storing tube is housed and stretches out from through hole; And

By the joint that resin forms, this joint makes ball-point pen tip link to each other with ink storing tube, and has and be used for the lead ink pipeline of ball-point pen tip and in abutting connection with the abutment structure of the fore-end of shaft cylinder of ink; It is characterized in that described abutment structure a plurality of positions in the axial direction form, and are formed by the longitudinal rib that extends in the axial direction.

2. ball pen as claimed in claim 1, it is characterized in that, described joint is by forming near second joint that is provided with later with close first joint that is provided with previously with at axial direction at axial direction, valve chamber forms between described first and second joints and ball valve is housed therein, and ball valve can adjacency ball seat round the ink pipeline of second joint and form, and abutment structure forms on each of first and second joints.

3. ball pen as claimed in claim 1 or 2 is characterized in that each bar in the described longitudinal rib has the structure of taper, and its height diminishes near the front with respect to axial direction.