CN202952699U

CN202952699U - Pen refill

Info

Publication number: CN202952699U
Application number: CN 201220659351
Authority: CN
Inventors: 曲政宇
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-11-14
Filing date: 2012-11-14
Publication date: 2013-05-29
Anticipated expiration: 2022-11-14

Abstract

The utility model discloses a pen refill which comprises a pen head and a pen tube which are connected together, wherein the pen tube is filled with ink; and one end, which is far away from the pen head, of the ink is filled with backflow preventing oil. The pen refill is structurally characterized in that a spherical backflow preventing block is suspended in the backflow preventing oil; the inner side of the tail part of the pen tube is provided with a cylindrical clamping platform; and one end, which is matched with the backflow preventing block, of the clamping platform is in an arc shape, and thus, the backflow prevention airtightness of the backflow preventing oil can be ensured even if the backflow preventing block is deflected in the backflow preventing oil.

Description

A kind of pen core

Technical field

The utility model relates to a kind of pen core, is specifically related to a kind of pen core that prevents that ink from flowing backwards.

Background technology

The various pen cores that use at present, mostly comprise nib and the shaft of a writing brush, ink is housed in the shaft of a writing brush, in order to make pen core can be stuck in easily in a shell, also be provided with the connection support member between nib and the shaft of a writing brush, in order to prevent that the ink in the shaft of a writing brush from flowing backwards, away from an end of nib, anti-backflow oil is housed at ink, anti-backflow oil had both had good mobility, can move to written direction gradually with the use of ink, there is again the bonding force slightly stronger than ink, so, ink backward flow problem when in the ordinary course of things, anti-backflow oil can solve the pen core inversion.The weak point of this pen core is, when variations in temperature, the bonding force of anti-backflow oil and mobility can change thereupon, and environment temperature raises, and the bonding force of anti-backflow oil weakens, and mobility strengthens, and when pen core is inverted, can flow out pen core under Action of Gravity Field with ink.Current existing a kind of pen core, its inside is provided with anti-backflow device, but owing between sealing block and the shaft of a writing brush, leaving gap, and sealing block is to suspend indefinitely, so sealing block and the position of card platform upper vent hole very easily coordinate inaccurately, causes sealing effectiveness bad.

The utility model content

The technical problems to be solved in the utility model is for above-mentioned deficiency, provide a kind of simple in structure, can prevent that ink from flowing backwards, the pen core of good airproof performance.

For solving the problems of the technologies described above, this pen core comprises nib and the shaft of a writing brush linked together, ink is housed in the shaft of a writing brush, away from an end of nib, anti-backflow oil is housed at ink, its design feature is to be suspended with spheroid anti-backflow piece in described anti-backflow oil, described shaft of a writing brush afterbody inboard is provided with cylindrical Ka Tai, and the end that described Ka Tai is corresponding with the anti-backflow piece is circular arc.

Adopt the pen core of said structure, the anti-backflow piece is spherical, and the end of Ka Tai is the circular arc coordinated with the anti-backflow piece, even therefore the anti-backflow piece is inclined to one side in the transfer of anti-backflow oil, also can guarantee the sealing of its anti-backflow.

Leave the gap that can rotate for the anti-backflow piece between described anti-backflow piece and the shaft of a writing brush, but the conversion of random notes tube angulation position and rotating.

Described Ka Tai is formed to the compacting of shaft of a writing brush axial centre by shaft of a writing brush afterbody.

Described card platform middle part is provided with air-vent, and shaft of a writing brush inner air and outer air is communicated with.

The anti-backflow piece is made by the material identical or approximate with the anti-backflow oil density, a vacuum chamber perhaps is set in the anti-backflow piece, like this, the anti-backflow piece just can be suspended in anti-backflow oil, movement with anti-backflow oil is moved, neither can float to the upper surface of anti-backflow oil, also can not sink to the bottom of anti-backflow oil.When temperature raises, the bonding force of anti-backflow oil starts to reduce and the mobility enhancing, when pen core is inverted, ink starts to the pen core afterbody, to move under the self gravitation effect, and anti-backflow oil and anti-backflow piece move thereupon, when spherical anti-backflow piece is encountered circular arc card you section, even it is inclined to one side that the anti-backflow piece turns, passage also can be sealed, so the gap length between anti-backflow piece and the shaft of a writing brush, can not affect the anti-backflow effect.

In sum, this pen core is simple in structure, can effectively prevent that ink from flowing backwards, good sealing effect.

The accompanying drawing explanation

By reference to the accompanying drawings the utility model is described in further detail:

The structural representation of pen core when Fig. 1 is normal the use;

The structural representation that when Fig. 2 is the pen core inversion, the anti-backflow piece stops ink to flow backwards.

The specific embodiment

As depicted in figs. 1 and 2, this pen core comprises nib 1 and the shaft of a writing brush 3, it is aforementioned that both are fixed together by connector 2, ink 3-1 is housed in the shaft of a writing brush 3, be provided with anti-backflow oil 3-2 at ink 3-1 away from a nib end of 1, in anti-backflow oil 3-2, anti-backflow piece 4 is housed, the density of anti-backflow piece 4 is identical with the density of anti-backflow oil 3-2, so anti-backflow piece 4 can be suspended in anti-backflow oil 3-2, like this, when pen core is vertically placed, anti-backflow piece 4 just can not skid off anti-backflow oil 3-2, in order to prevent that ink from flowing backwards, anti-backflow piece 4 is made the spheroid matched with the shaft of a writing brush 3 inner chambers, it can be also the ball shape of hollow, leave very little gap between anti-backflow piece 4 and anti-backflow oil 3-2, in order to prevent anti-backflow piece 4 shaft of a writing brush 3 that flows backwards, be plugged with card platform 5 at the shaft of a writing brush 3 away from a nib end of 1, card platform 5 is cylindric, its side and the shaft of a writing brush 3 inwalls are interference fit, to guarantee that blocking under normal circumstances platform 5 is clamped in the shaft of a writing brush 3 always, for the shaft of a writing brush 3 inner air and outer air are communicated with, card platform 5 middle parts are provided with an air-vent 5-2 who is communicated with card platform 5 two ends in the axial direction, the end that card platform 5 coordinates with anti-backflow piece 4 is circular arc, when pen core is inverted ink 3-1 refluence, anti-backflow piece 4 moves with anti-backflow oil 3-2, when anti-backflow piece 4 moves to card platform 5 when neighbouring, even turn inclined to one side because of suspension, the radian of anti-backflow piece 4 also can coordinate with the circular arc of card platform 5, by air-vent 5-2 sealing, under Action of Gravity Field, anti-backflow piece 4 is pressed together with card platform 5, the refluence passage is cut off, and refluence stops.By pen core forward to normal user to the time, ink 3-1, anti-backflow oil 3-2 and anti-backflow piece 4 return to again origin-location under the self gravitation effect, can normally use.

Claims

1. a pen core, comprise the nib (1) and the shaft of a writing brush (3) that link together, ink (3-1) is housed in the shaft of a writing brush (3), ink (3-1) away from the nib (1) an end anti-backflow oil (3-2) is housed, it is characterized in that: in described anti-backflow oil (3-2), be suspended with spherical anti-backflow piece (4), the described shaft of a writing brush (3) afterbody inboard is provided with cylindrical Ka Tai (5), and the end that described Ka Tai (5) is corresponding with anti-backflow piece (4) is circular arc.

2. pen core according to claim 1, is characterized in that: leave the gap that can rotate for anti-backflow piece (4) between described anti-backflow piece (4) and the shaft of a writing brush (3).

3. pen core according to claim 1 is characterized in that: described Ka Tai (5) is formed to the compacting of the shaft of a writing brush (3) axial centre by the shaft of a writing brush (3) afterbody.

4. pen core according to claim 1, it is characterized in that: the middle part of described Ka Tai (5) is provided with air-vent (5-2).