JP2524018B2 - Ink writing instrument - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink-type writing instrument, including a writing tip, an ink storage chamber, a vertically elongated shaft cylinder surrounding the ink storage chamber, the ink storage chamber and the writing tip. And an ink adjuster disposed between the ink adjuster and the ink adjuster, the ink adjuster having a capillary action for supplying ink to the writing tip, and the outer peripheral surface of the ink adjuster. And a plurality of annular grooves formed by processing in a range adjacent to the writing tip portion, the grooves are separated from each other by a plurality of thin lateral ribs,
A plurality of compensation chamber groups each having a capillary action for compensating the excess amount of ink flowing out of the ink storage chamber due to a change in atmospheric pressure or a change in temperature is formed, and the compensation chambers are formed. A group is connected to the ink storage chamber through the ink passage, and is further connected to a ventilation passage having no capillary action, the ventilation passage directing the compensation chamber group toward the ink storage chamber. The present invention relates to a type which is connected to the ink storage chamber via a partitioning control gap and a compensation chamber group adjacent to the control gap.

[0002]

2. Description of the Related Art An ink type writing instrument of such a type is based on German Patent No. 2609668 and German Patent Publication No. 3530906 (corresponding to Japanese Patent Application No. 59-130840). It is known. In these known writing instruments, ink storage is reliably maintained using an ink regulator without the use of internal capillary reservoirs or cells of fibers. This ink regulator absorbs ink flowing out of the ink storage chamber based on changes in atmospheric pressure or temperature, thereby preventing ink from leaking at the writing tip. At the same time, a sufficient amount of ink is supplied to the writing tip through the ink passage, so that even when using various writing tips, such as hard fiber pins or soft fiber pins, ball writing tips or nibs, Smooth and uniform writing is possible each time.

In such an ink-type writing instrument, the volume of the ink storage chamber, and thus the maximum possible ink storage capacity, is related to the volume of the comb groove having the capillary action, that is, the compensation chamber. If the ink storage chamber is too large, when the temperature and atmospheric pressure change, a larger amount of ink will be pushed out of the ink storage chamber than the compensation chamber can accommodate.
An unwanted outflow of ink occurs at the writing tip. In known ink-type writing instruments, the number of compensating chambers is increased in order to obtain as much ink storage capacity as possible, which in turn increases the axially configured length of the ink regulator. In order to ensure a sufficient ink supply to the ink path, the ink path must be guided to the writing tip separately from the compensation chamber. For this purpose, an ink passage is formed in the ink supply core which penetrates through the ink regulator at the center, which makes this ink writing instrument expensive to manufacture.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to improve an ink-type writing instrument of the type described at the beginning so that the ink can be easily manufactured and has a large ink storage chamber. To provide a writing instrument.

[0005]

In order to solve this problem, in the structure of the present invention, a plurality of compensation chambers having a capillary action are provided on the outer peripheral surface of the ink regulator in a range adjacent to the ink storage chamber. A further compensation chamber group is arranged, said compensation chamber group having a common axis extending parallel to the longitudinal axis of the ink regulator body, i.e. with respect to the ink regulator body. It has an eccentric axis and is connected to the ventilation passage, and is connected to the ink storage passage leading to the ink storage chamber via a capillary gap formed on the basis of the eccentric position. The ink storage passage has a capillary action lower than that of the capillary gap, and the ink passage is in contact with the compensation chamber group adjacent to the writing tip.

[0006]

In the ink-type writing instrument according to the present invention, the ink passage is in contact with the compensation chamber group adjacent to the writing tip. This simplifies the manufacture of the ink conditioner and the assembly of the writing instrument. The compensating chambers adjacent to the writing tip, i.e., the constituent lengths of the compensating chambers bounded by the control gap having a capillary action toward the ink storage chamber, were connected to these compensating chambers via an ink passage. Including the writing tip, it can be limited to a length that is particularly suitable for optimum delivery of ink to the writing tip and favorable control characteristics without the disadvantages of the total compensation volume. The additionally required compensation volume is provided by a second group of compensation chambers adjacent to the ink reservoir. The individual compensating chambers of this second compensating chamber group are connected to the ink storage chambers via capillary gaps which are respectively formed on the basis of the eccentric position, so that the ink is supplied independently of the control characteristics of the control gap. It can be contained or released.
In this case, in actual use, the two compensation chamber groups connected to the ink storage chamber separately from each other are combined according to the invention to provide a very reliable control characteristic which ensures a quick response and a uniform ink flow. It was found that Such control characteristics are equally suitable for a wide variety of writing tips. Based on the target control characteristic, the axial configuration length of the compensation chamber group adjacent to the writing tip is limited, whereas the compensation chamber group adjacent to the ink storage chamber has an inconvenient control characteristic. It can be expanded according to the desired size of the ink reservoir without affecting it.

In yet another aspect of the invention, a control gap having a capillary action opens into the ink storage passage. Further, the ink passage may extend parallel to the ink storage passage to the ink storage chamber. In this case, the ink passages may consist of axially parallel capillary grooves that open radially outward. The capillary groove extends into the interior of the compensation chamber and the wall of the ink storage passage. Such an arrangement contributes to the easy manufacturability of the ink regulator, while at the same time ensuring an uninterrupted capillary connection from the ink reservoir to the writing tip, which cannot be interrupted by air inclusions.

In another configuration of the present invention, the purpose is to simply and effectively connect different writing tips to an ink conditioner.
The end of the ink adjuster facing the writing tip is
It has a hole in the middle, the ink passage is opened in the hole, and the hole is filled with a porous material, and the material penetrates into the hole at the writing tip. An ink passage surrounding the connection end opens into a hole, which hole is filled with a porous material, in particular a fibrous material, which material is connected to the connection end of the writing tip protruding into said hole. Surrounds. This allows various shapes of writing tip to be connected to a single ink conditioner without special adjustment.

[0009]

Embodiments of the present invention will now be described in detail with reference to the drawings.

The illustrated ink-type writing instrument has a cylindrical barrel 1. However, the barrel may also have a polygonal cross section, for example a hexagonal cross section. The illustrated shaft cylinder 1 surrounds the ink storage chamber 2 and is closed at one end (not shown) thereof. An ink adjuster 3 and a barrel front portion 4 are inserted into the other open end of the barrel 1 shown in the figure. The barrel front portion 4 is rigidly connected to the barrel 1 and has a writing tip 5. This writing tip 5
Is made of fiber core. The writing tip 5 is held by a plurality of ribs 6 arranged in a star shape. An air passage is provided between the ribs 6, and the air passage connects the hollow chamber 7 provided inside the shaft cylinder front portion 4 to the ambient atmosphere.

The ink regulator 3 has a main body having a cylindrical basic shape, and the outer diameter of this main body is substantially equal to the inner diameter of the barrel 1. However, the ink adjuster 3 may have a polygonal basic shape. Of the illustrated ink adjuster 3,
The end facing the writing tip 5 projects into the hollow chamber 7 in a section with a reduced diameter. This end is the middle hole 9
The connecting end of the writing tip 5 projects into this hole 9. The holes 9 comprise a porous material made of fibers, which surrounds the connecting end of the writing tip 5 and produces an effective ink flow towards the writing tip 5. The deformability of this porous fibrous material serves to compensate for dimensional deviations that occur during manufacture.

The cylindrical outer peripheral surface of the ink regulator 3 is machined with a plurality of annular grooves, which are separated from each other by a plurality of thin lateral ribs, each of which has a plurality of compensations. Compensation room group 10,1
1, 12 and 13 are formed. Compensation room group 10, 11,
The axial width of each compensation chamber belonging to 12 and 13 is set in each case according to the desired capillary action. In the compensating chamber groups 10, 11 and 12 provided in the range in which the axial width of each compensating chamber is adjacent to the writing tip portion 5, the compensating chamber group starts from the writing tip portion 5 toward the ink storage chamber 2. It is decreasing every time. The width of each compensation chamber belonging to the compensation chamber group 13 provided in the range adjacent to the ink storage chamber 2 is substantially equal to the width of the compensation chamber belonging to the compensation chamber group 11. Ink adjuster 3
Unlike the compensation chamber groups 10, 11, 12 which are arranged concentrically with respect to the axis of the cylindrical body forming
It has another common axis extending parallel to the axis of the cylinder of the ink conditioner 3. Therefore, the compensation room group 13
Has an eccentric position, and in this case, the maximum depth in the radial direction of the compensation chambers belonging to this compensation chamber group 13 is located in the drawing plane of the left half of the drawing and The minimum depth of is in the drawing plane in the right half of the drawing. However, the compensation chamber groups 10, 11 and 12 do not necessarily have to be arranged concentrically with respect to the ink adjuster 3. For example, a coaxial arrangement with the compensation chamber group 13 adjacent to the ink storage chamber 2 is also conceivable. What is important in obtaining the desired mode of action is simply the compensation chamber group 10, 1 adjacent to the writing tip 5.
1, 12 have a connecting cross-section in the capillary ink passage 17 which ensures a smooth capillary transition between the ink passage 17 and these compensation chambers 10, 11, 12. It is just connected.

A ventilation passage 14 formed by a longitudinal groove having no capillary action extends through the entire compensation chamber group 10, 11, 12, 13 and is directed toward the writing tip 5 of the ventilation passage 14. The open end opens into the annular passage 15, which also has no capillary action. The annular chamber 15 is connected to the hollow chamber 7 through a ventilation slit 16 located on the side of the ink regulator 3 opposite to the ventilation passage 14. The ink regulator 3 has an ink passage 17 having a capillary action on the side opposite to the ventilation passage 14, and the ink passage 17 extends from the ink storage chamber 2 to the ink storage chamber 2
To the compensation chamber group 10 that is furthest away. The ink passage 17 opens into the hole 9 in the compensation chamber group 10. The ink passage 17 includes the compensation chamber groups 10 and 1.
Since it extends through 1, 12, these compensation chamber groups 1
It is directly connected to 0, 11, and 12. Ink passage 1
7 is narrowly dimensioned, in this case the compensation room group 1
The ink that has been pushed into the 0, 11, and 12 can be sucked again through the ink passage 17. Compensation room group 13
In the range (1), the ink storage passage 18 is adjacent to the ink passage 17 on the outer side in the radial direction, and the ink storage passage 18 is formed to be considerably wider than the ink passage 17 and has no significant capillary action. The compensation chamber groups 13 are each connected to an ink storage passage 18 by a capillary gap 19 formed on the basis of its eccentric position. The ink storage passage 18 opens toward the ink storage chamber 2. The ink storage passage 18 is separated from the compensation chamber group 12 by a control gap 20.
Is formed to be slightly larger than the width of the ink passage 17.

In the ink type writing instrument, ink flows from the ink storage chamber 2 through the ink passage 17 having a capillary action into the holes 9 filled with the porous fiber material,
Further, it flows into the writing tip portion 5 from this place. At the time of writing, the ink also fills the ink storage passage 18, in which case the ink is held back in the capillary gap 19. When the pressure in the ink storage chamber 2 decreases due to the use of ink, the air that has entered the hollow chamber 7 through the spaces between the ribs 6 is
It can flow into the compensation chamber group 12 adjacent to the control gap 20 via the ventilation slit 16, the annular passage 15 and the ventilation passage 14. From this location, this air flows in the form of small bubbles through the control gap 20 and the ink storage passage 1
It is possible to go up to the ink storage chamber 2 along 8. This provides pressure compensation and ensures a controlled wake of the ink on the writing tip 5. The distance between the control gap 20 and the end of the writing tip 5 that comes into contact with the paper is adjusted according to the desired control characteristics. Increasing or decreasing this spacing does not provide very favorable control characteristics.

When the ink is pushed away from the ink storage chamber 2 due to the external pressure drop or the temperature rise, the ink enters the compensation chamber groups 10, 11, 12 through the ink passage 17 and these compensation chamber groups 10 are discharged. , 11 and 12 can be gradually and continuously filled downward from the upper side. At the same time, a portion of the displaced ink volume can also enter the compensation chamber group 13 via the capillary gap 19. In this way, a relatively large ink volume can be stored in the compensation chamber groups 10, 11, 12, and 13 without changing the ink outflow characteristics at the writing tip 5. When the pressure change or temperature change reverses again, the ink stored in the compensation chamber groups 10, 11, 12, 13 is returned to the ink storage chamber 2 again. This is because the air can re-enter the ink storage chamber 2 through the control gap 20 only when the ink is sucked out from the compensation chamber group 12 adjacent to the control gap 20. Compensation chamber group 10, 11, 1 with pressure and temperature characteristics
Compensation chamber group 1 if 2 and 13 emissions are not produced
The discharge of 0, 11, 12, and 13 is performed at the time of writing. This is because the ink is first drawn from the compensation chamber group 10, 11, 12, 13 before a new backflow from the ink storage chamber 2 is performed.

The ink-type writing instrument can be manufactured easily and inexpensively. This is because the ink regulator 3 can easily be manufactured as a one-piece component with its longitudinal grooves and lateral grooves open to the outside and does not require any special assembly work. This is possible in particular because of the arrangement and the configuration of the compensation chamber. This is because an uneconomical ink passage which penetrates the ink regulator separately from the compensation chamber is not required.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of an end of a writing tip according to the present invention on the writing tip side.

FIG. 2 is a cross-sectional view taken along line II-II of FIG.

3 is a cross-sectional view taken along the line III-III in FIG.

FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG.

[Explanation of symbols]

1 shaft cylinder, 2 ink storage chamber, 3 ink adjuster,
4 axis front part, 5 writing tip, 6 ribs,
7 hollow chambers, 8 sections, 9 holes, 10, 11, 1
2, 13 Compensation chamber group, 14 Ventilation passage, 15 Annular passage, 16 Ventilation slit, 17 Ink passage, 1
8 ink storage passage, 19 capillary gap, 20
Control gap

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Oud Obersterer, Federal Republic of Germany Langenhagen Hoppelgartenring 86 (72) Inventor Gunter Ulrich, Hanover, Federal Republic of Germany Hanover 61 Hirschberger Strasse 36

Claims (5)

(57) [Claims] 1. An ink-type writing instrument, comprising a writing tip.
(5), an ink storage chamber (2), and the ink storage chamber
A vertically long shaft cylinder (1) surrounding (2), and the ink storage
An a disposed between the chamber (2) and the writing tip (5).
An ink regulator (3) is provided, and the ink regulator
(3) supplies ink to the writing tip (5).
The ink passage (17) having a capillary action, and
Next to the writing tip (5) on the outer peripheral surface of the ink regulator (3)
Equipped with a plurality of annular grooves machined in the contact area
And the grooves are separated from each other by a plurality of thin lateral ribs.
Off, based on changes in atmospheric pressure or changes in temperature
Make up for excess ink flowing out from the ink storage chamber (2).
Compensation chamber with capillarity to compensate
A plurality of compensation room groups (10, 11, 12) are formed,
The compensation chamber group (10, 11, 12) is the ink passage.
Connected to the ink storage chamber (2) via (17)
The vent passage (14) which has no capillary action.
And the ventilation passage (14) is connected to the compensation chamber group.
Direct (10, 11, 12) to the ink storage chamber (2)
And a control gap (20) for partitioning the control gap
The compensation chamber group (12) adjacent to (20) is used to
Smell of the type connected to the storage room (2)
The ink storage on the outer peripheral surface of the ink adjuster (3).
In the area adjacent to the chamber (2), a plurality of capillaries having capillary action
There is another compensation room group (13) consisting of compensation rooms,
The compensation chamber group (13) is the main body of the ink regulator (3).
With a common axis extending parallel to the longitudinal axis
That is, eccentric to the main body of the ink regulator (3)
Has a general axis, and the ventilation passage (14) has
Connected and shaped according to their eccentric position
Through the formed capillary gap (19), the ink storage
Connected to the ink storage passage (18) leading to the warehouse (2)
And the ink storage passage (18) is connected to the capillary gap.
(19) has a lower capillary action,
The ink passage (17) is adjacent to the writing tip (5).
Interfacing with the compensation room group (10, 11, 12)
Ink type writing instrument characterized by. 2. The control gap (2) having a capillary action.
0) is open to the ink storage passage (18),
The ink-type writing instrument according to claim 1. 3. The ink passage (17) has the ink reservoir.
The ink storage chamber (2) is parallel to the storage passage (18).
Ink brush according to claim 1 or 2, which extends to
Stationery. 4. The ink passage (17) is radially outside.
A capillary groove that is open to the side and is parallel to the axis.
Of the compensation chamber group (1) adjacent to the writing tip (5).
0, 11, 12) and the ink storage passage (1
Any of claims 1 to 3, which extends to the wall of 8).
Ink type writing instrument according to item 1. 5. The writing destination of the ink adjuster (3)
The end facing the end (5) has a hole (9) in the middle
The ink passage (17) is opened in the hole (9).
And the holes (9) are filled with a porous material.
The material is the hole (9) of the writing tip (5).
5. Surrounding the connecting end projecting into the
The ink-type writing instrument according to any one of 1 to 6 above.