CN100445106C

CN100445106C - Ball-point pen with means of preventing inclination of the straight portion of the ball-pressing spring

Info

Publication number: CN100445106C
Application number: CNB2004800390609A
Authority: CN
Inventors: D·马罗塔; S·桑蒂尼
Original assignee: Premec SA
Current assignee: Premec SA
Priority date: 2003-12-29
Filing date: 2004-12-16
Publication date: 2008-12-24
Anticipated expiration: 2024-12-16
Also published as: ES2309585T3; CN1898093A; EP1699641A1; ATE400452T1; DE602004014977D1; KR101169482B1; EP1699641B1; WO2005065967A1; JP2007516872A; CH696635A5; HK1102923A1; JP4737554B2; KR20060114290A

Abstract

A ball-point pen (1) is described, said pen comprising a reservoir (2) communicating with a hole (10) connected to a capillary channel (3) of a tip (4) which is provided with a cavity (9) which seats the ball (5) for writing, this ball (5) being kept pressed against a retaining edge (9t) of the abovementioned cavity (9) as a result of the thrust of a compression resilient spring (6) terminating in a straight portion (6r) which is aligned with the longitudinal axis (N-N) of the ball-point pen (1) and the free end (6p) of which is in contact with the said ball (5). In the ball-point pen (1) according to the invention, the said capillary channel (3) has, inside it, means (7, 7') which, coming into contact with the said straight portion (6r) of the spring (6), prevent it from becoming inclined with respect to the said longitudinal axis (N-N) of the ball-point pen (1).

Description

Ball pen

Technical field

The present invention relates to the technical field of ball pen.

Background technology

As everyone knows, these comprise the printing ink reservoir that is communicated with the substantial cylindrical hole, and this cylindrical hole is connected on the most advanced and sophisticated capillary channel, and this tip has the cavity that portion within it accommodates ball for writing.When pen is not write, ball keeps being pressed against and keeps on the edge, this maintenance edge is formed on the described tip equally, in case printing ink leaks, and this function realizes by elastic compression spring, this spring utilizes the free end of straight part to be pressed on the ball, described spring with this free end as clearing end.When using, pen is crushed on the surface that will write, and above-mentioned ball overcomes the resistance of spring towards most advanced and sophisticated internal direction and pressurized, and the enough amounts in maintenance edge are left in displacement, flow to the outside to allow to write with printing ink.

As everyone knows, because the size of above-mentioned each component part is all very little, therefore the straight part of above-mentioned spring also has very little diameter (a few tenths of millimeter), and, when this spring in writing process axially during pressurized, this spring slides on the ball surface continually, bends with respect to the other parts of spring, and depart from the initial position that coincides with the ball pen longitudinal axis, and be located such that this free end is positioned near ball side point place, described maintenance edge.

In this position, the straight portion branch of spring is pressed on the ball, in writing process, active force with quite big cross stream component makes described ball be leaned against by pressurized laterally to keep on the edge, owing to must keep keeping play between edge and the ball, so the annular cross section that printing ink therefrom flows out is asymmetric with respect to the axis of pen, this annular cross section has non-constant, in the length that on the circumferencial direction of ball, from the null value to the maximum, changes, and reach described maximum size, this maximum size makes printing ink to flow out than the bigger speed of predetermined flow velocity of when design, and this flow velocity calculates according to the viscosity of printing ink and the consistent width of annularly flow cross section.

The aforesaid setting can cause causing inaesthetic effect along writing the phenomenon that circuit causes staying at random stain, and this effect can link together with pen inferior naturally.

And in above-mentioned stain district, the printing ink that forms greater than the normal thickness zone can't become dry fast, if the people unintentionally because of hand or arm erasing to described stain, its result can cause spreading out of stain, forms inaesthetic stain, but also the people's that made dirty hand or arm.

Summary of the invention

The present inventor aims to provide a kind of solution to the problems described above, and designed a kind of ball pen of the above-mentioned type, wherein, the straight part of described ball holddown spring is passed described capillary channel, and described capillary channel is provided with and can prevents the mechanism of this straight portion branch with respect to the longitudinal axis inclination of pen.

In certain embodiments of the present invention, these mechanisms comprise enlarged, and it has formed the narrow section of capillary channel, and the straight part of described spring is inserted in the described stenosis area in roughly complementary mode, and stay the play of minimum.

Therefore, the invention provides a kind of ball pen, comprise the reservoir that is communicated with the hole, described hole is connected on the most advanced and sophisticated capillary channel, described tip is provided with the cavity that has held ball for writing, described ball keeps being pressed against on the maintenance edge of described cavity by the thrust of elastic compression spring, described elastic compression spring ends at straight part, described straight part is aimed at the longitudinal axis (N-N) of described ball pen, and the free end of described straight part contacts with described ball, it is characterized in that, described capillary channel portion within it has mechanism, described mechanism contacts with the described straight portion branch of described spring, thereby prevents that described straight portion branch from tilting with respect to the described longitudinal axis (N-N) of described ball pen; Has narrow section with described capillary channel, the described straight part of described spring is passed described narrow section on axis direction, described narrow section is designed to hold described straight part and stay the play of minimum in roughly complementary mode dimensionally, thereby prevents that basically described straight portion branch is in obliquity with respect to above-mentioned longitudinal axis (N-N).

Description of drawings

Now, be described in more detail according to two kinds of preferred embodiments to ball pen of the present invention with reference to the accompanying drawings, wherein:

Fig. 1 is the amplification longitudinal section of the part of the ball pen designed according to prior art, and this moment, it was used to write;

Fig. 2 is the amplification longitudinal section according to the some parts of first exemplary embodiment of ball pen of the present invention;

Fig. 3 is the amplification longitudinal section according to the some parts of second exemplary embodiment of ball pen of the present invention.

The specific embodiment

If we consider Fig. 1, can see that situation wherein is, ball pen 101 according to prior art comprises printing ink reservoir (only schematically having shown its fraction), this printing ink reservoir is connected with cylindrical hole 10, this cylindrical hole is connected on the capillary channel 3 at tip 4, this tip 4 is provided with cavity 9, and this cavity 9 accommodates the ball 5 that is used to write, and described capillary channel 3 ends at this cavity 9 inside.

The thrust that this ball is applied by elastic compression spring 6 keeps being pressed against and keeps on the edge 9t, this maintenance edge is to form on the profile in described cavity 9 outsides, this spring 6 ends at the straight part 6r that the longitudinal axis M-M with ball pen 101 aligns, and its free end 6p (showing with solid line) contacts with ball 5.This straight part 6r passes cylindrical shape capillary channel 3 with coaxial manner, and when ball pen 101 is used to write, as shown in the figure, the power Q that acts on the ball 5 is passed on the straight part 6r at a P, therefore and cause the bending of straight part 6r with respect to an O, straight part 6r is connected on the other parts of spring 6 at this O place, thereby causes this straight part 6r tilt with respect to described axis M-M (right side among the deflection that the tilts figure).

Therefore, from this constantly, straight part 6r just is applied to the non axial reaction force that transversely has big component on ball 5, and this has just caused above-mentioned unfavorable effect.

In Fig. 2, as an alternative, situation about can see is, in first exemplary embodiment 1 according to ball pen of the present invention, avoided above-mentioned phenomenon by in capillary channel 3, constituting a cylindrical narrow section 7, this narrow section has the axis that coincides of longitudinal axis N-N with pen, the straight part 6r of spring 6 passes this narrow section, and in fact this narrow section has size and dimension with the size and dimension complementation of straight part 6r (except indivisible play, this play is some amplification in the drawings, it is used to allow any thermal expansion of spring 6 manufactured materials, and this material coefficient of thermal expansion is slightly different with the thermal expansion of the manufactured materials at tip 4).Therefore, in situation described above, in the ink flow of passing described narrow section 7, may block, this narrow section 7 is partly blocked by the straight part 6r of spring 6, the inventor has visualized the groove 8i that can form one or more radially break-through, and these grooves will hold on the described hole that above-mentioned cavity 9 is connected to printing ink reservoir 2 is connected of ball 5.

Fig. 3 shows in according to second exemplary embodiment 11 of ball pen of the present invention, except described narrow section 7 ', all various component parts of being mentioned in first exemplary embodiment are identical (therefore utilizing identical label to indicate), in this embodiment, this narrow section is not to be made of cylindrical restraining structure, but form by annulus 12 in the inside of capillary channel 3, this annulus 12 has inwardly outstanding semi-circular cross-section, and has the axis that the longitudinal axis N-N with ball pen 11 coincides.

In Fig. 2 and this two embodiment shown in Figure 3, described narrow section 7,7 ' irrespectively be held fixing basically with their shape, promptly come directed along the longitudinal axis N-N of ball pen 1,11, the straight part 6r of spring 6, therefore, the free end 6p of this straight part is pressed on the ball 5 along axis direction in the approximate centre position always, thereby has avoided above-mentioned shortcoming.

Utilization just can realize inventor's intended purposes according to ball pen of the present invention,, provides such ball pen that is, and it can write out more consistent lines, and can not form stain and/or uneven edge.

Claims

1. ball pen (1,11), comprise the reservoir (2) that is communicated with hole (10), described hole is connected on the capillary channel (3) of tip (4), described tip is provided with the cavity (9) that has held ball for writing (5), described ball (5) keeps being pressed against on the maintenance edge (9t) of described cavity (9) by the thrust of elastic compression spring (6), described elastic compression spring (6) ends at straight part (6r), described straight part is aimed at the longitudinal axis (N-N) of described ball pen (1), and the free end (6p) of described straight part (6r) contacts with described ball (5), it is characterized in that, described capillary channel (3) portion within it has mechanism (7,7 '), described mechanism (7,7 ') contact with the described straight part (6r) of described spring (6), thereby prevent that described straight portion branch from tilting with respect to the described longitudinal axis (N-N) of described ball pen (1); With

Described capillary channel (3) has narrow section (7,7 '), the described straight part (6r) of described spring (6) is passed described narrow section on axis direction, described narrow section is designed to hold described straight part and stay the play of minimum in roughly complementary mode dimensionally, thereby prevents that basically described straight portion branch is in obliquity with respect to above-mentioned longitudinal axis (N-N).

2. ball pen according to claim 1, it is characterized in that, one or more break-through grooves (8i) form in the zone of described narrow section (7), and described break-through groove portion's cavity (9) of holding described ball within it is connected on the described hole (10) that is connected with described reservoir (2).

3. ball pen according to claim 1 and 2 is characterized in that, described narrow section is formed by cylindrical restraining structure (7).

4. ball pen according to claim 1 and 2, it is characterized in that, described narrow section is limited by annulus (12), and described annulus has side-prominent semi-circular cross-section in described capillary channel (3), and the longitudinal axis (N-N) of the axis of described capillary channel and described ball pen (1) coincides.