Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
  • B43K—IMPLEMENTS FOR WRITING OR DRAWING
  • B43K8/00—Pens with writing-points other than nibs or balls
  • B43K8/02—Pens with writing-points other than nibs or balls with writing-points comprising fibres, felt, or similar porous or capillary material
  • B43K8/026—Pens with writing-points other than nibs or balls with writing-points comprising fibres, felt, or similar porous or capillary material with writing-points comprising capillary material
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
  • B43K—IMPLEMENTS FOR WRITING OR DRAWING
  • B43K8/00—Pens with writing-points other than nibs or balls
  • B43K8/003—Pen barrels

Definitions

• the present invention relates to a writing insert for a writing instrument and the like, in particular for a fineliner writing instrument according to the preamble of claim 1.
• the writing tips or the writing elements of these writing instruments are therefore fixed by means of mounts made of a rigid material, such as metal, for example by means of clamps. If the clamping is too loose, the writing element is irreversibly pressed into the writing instrument and the writing instrument is thereby unusable. If, on the other hand, the clamping is too tight, the writing element becomes more stable, but there is a risk that the capillary spaces in the writing element will be reduced or completely eliminated. For this reason and due to the small diameter of fineliner writing elements, precise adjustments with very small dimensional tolerances are necessary in the construction of such writing instruments.
• British Patent 746,81 5 discloses a writing instrument which is provided for labeling housings, packages and the like.
• the writing element of this known writing instrument is formed by a felt material, which should be interchangeable, since it wears out quickly on the rough surfaces for which this known writing instrument is intended.
• the writing insert itself consists of several individual parts that are screwed together using a total of five threads. The use of threads enables non-destructive quality control in this most ⁇ th writer. But in contrast, employs the use of threads on a writing implement certain minimum ⁇ diameter for writing instrument advance, so that this solution in particular for the above-mentioned Fineliners writing instrument is used. In addition, the production of the threads causes considerable costs. It is an object of the present invention to provide a writing insert of the type mentioned at the outset, in particular for fineliner writing instruments, which enables a non-destructive final inspection with a simple and inexpensive construction.
• the housing part By using a transparent material, preferably a transparent plastic for the housing part, it is possible in a simple manner to carry out a non-destructive quality control, in particular at that point on a writing instrument that is particularly important for the functionality of the device. In particular, the arrangement and the functionality of the spring element can be checked.
• the transparent design of the housing part offers the possibility to show the user of the writing instrument the complex structure and in particular the compression process, so that he can recognize and appreciate the high quality of the writing instrument.
• the housing part of the writing insert By designing the housing part of the writing insert in such a way that the spring element is supported directly on the housing part, the use of a separate component for this support function, as is the case with European patent application 0 461 292, can be dispensed with.
• This increases the inside diameter of the through cavity, so that a spiral spring, preferably made of metal, can be used as the spring element.
• a spiral spring initially has the advantage that it can be produced with a well-defined modulus of elasticity, which significantly improves the quality of such writing instruments.
• spiral springs can be manufactured with high accuracy and cheaper than a high-precision elastomer sleeve.
• spiral springs in particular are not subject to aging influences or go chemical reactions with the writing fluid used, as is the case with the elastomer sleeve in the prior art.
• the spiral spring offers the possibility of being able to provide a long spring travel for the writing element.
• Such spiral springs made of metal are not influenced by external influences, in particular by the passage of time or chemical reactions with the writing fluid used.
• a direct support of the elastic element on the housing part is also understood to mean the interposition of annular disks and the like between the end of the elastic element facing the support surface of the housing part and the housing part.
• the support of the spring element on the housing part can be achieved in that the through cavity of the housing part has at least a first cavity section in which the spring element is accommodated and a second cavity section, the inside diameter of which is smaller than the inside diameter of the first cavity section.
• the spring element can then be supported on the transition stage which forms at the transition from the first cavity section to the second cavity section and forms a support surface which runs preferably perpendicular to the central longitudinal axis of the writing element.
• the inside diameter of the second cavity section corresponds to the outside diameter of the writing element.
• the edges at the front ends of the second cavity section can be provided with insertion chamfers.
• a third cavity section Connects to the second cavity section, a third cavity section, the inside diameter of which is preferably larger than the inside diameter of the second cavity section, material savings can be achieved.
• the inside diameter of the third cavity section can be smaller than the inside diameter of the first cavity section.
• the housing part can be designed in any way. It has proven to be particularly advantageous if the housing part has a first housing section and a second housing section, it being possible for the outer diameter of the second housing section to be smaller than the outer diameter of the first housing section.
• the second housing section can then be provided for connecting the writing insert to the other components of the writing device and the first housing section can form an outer contour of the writing device.
• the second housing section can be designed as a plug coupling, which is inserted into a tubular sleeve of the writing instrument, which is used, for example, to hold the writing fluid, and is fixed there in a fluid-tight manner.
• the first housing section can have at least approximately the shape of a truncated cone. If the first housing section is designed to be arcuate in longitudinal section, so that it has, for example, the shape of a cut projectile tip, this shape of the first housing section acts like a magnifying glass and simplifies quality control. In addition, the spiral spring and its mode of operation are made even more visible.
• the optical effect is thereby enhanced.
• a clamping sleeve fixed to the writing member ⁇ is introduced.
• the ferrule can have at least one Deformation point on the writing element.
• the deformation point can be formed, for example, by a dent made in the clamping sleeve by a special tool. It is particularly preferred that the clamping sleeve is fixed to the writing element via a plurality of such deformation points.
• the clamping sleeve has an expansion at its end facing the spring element, on which the spring element can be supported.
• the guide device for the writing element can in principle be designed as desired.
• the guiding device can, for example, be formed by the second cavity section of the through cavity.
• the guide device is alternatively and additionally formed by a guiding sleeve which projects from the housing part with a first sleeve section in the direction of the writing tip and which is in contact with a second sleeve section extends the through cavity, wherein the axial length of the second sleeve portion is less than the axial length of the spring element.
• This shortened configuration of the guide device or guide sleeve creates space in the housing part, in particular in the first cavity section of the through cavity for the spiral spring. In comparison to the prior art, however, this is only possible in that the spring element is supported directly on the housing part.
• the solution according to the invention is particularly advantageous for writing elements which have a diameter in the range from 0.2 mm to 1.5 mm, preferably in the range from 0.3 mm to 0.7 mm.
• a writing insert S according to the invention is shown in longitudinal section.
• the writing insert S according to the invention initially has a housing part 10, which is preferably made continuously from a transparent plastic, in particular by an injection molding process, and which has a first, in particular transparent housing section 10a and a second housing section 10b, which are arranged one behind the other in the longitudinal direction of the housing part 10 connect.
• the first housing section 10a which forms an outer circumferential surface of the writing instrument (not shown further), has an arcuate outer contour in longitudinal section, which in particular has the shape of a cut projectile tip.
• the second housing section 10b adjoining the first housing section 10a to the right has the shape of a sleeve with a circular cross section, the outer diameter of the sleeve being smaller than the outer diameter of the immediately adjacent region of the first housing section 10a.
• the outer diameter of the second housing section 10b may preferably have the same outer diameter as the left end 10c of the first housing section 10a.
• the second housing section 10b serves as a connecting part to a fluid reservoir of the writing instrument, not shown, in which the writing insert S according to the invention is used.
• the outer circumferential surface of the second housing section 10b can serve as a connection and fastening surface for the fluid-tight connection of the writing insert S to the reservoir.
• the existing at the transition from the first housing portion 10a to the second housing portion 10b face 10d, which is preferably vertical to the central longitudinal axis of the pen S can, as Montageflä ⁇ surface for the fluid reservoir are of the writing instrument.
• the fluid reservoir can be formed by a fluid tank in which the writing fluid is received in a free-flowing manner or by a capillary or fiber storage in which the writing fluid "bound" is recorded.
• the second housing section 10b can be a connecting part to any other functional component of the writing instrument.
• a through cavity 14 which extends coaxially to the central longitudinal axis L of the writing insert S from the left end 10c of the housing part 10 to the right end 10e thereof.
• the passage cavity 14 has a first cavity section 14a, which extends from the left end 10c into the interior of the housing part 10. This is followed by a second cavity section 14b, the inside diameter of which is smaller than the inside diameter of the first cavity section 14a.
• a support surface 16 which preferably extends vertically to the central longitudinal axis L of the writing insert S is formed.
• first, second and third cavity sections 14a, 14b, 14c preferably have a circular cross section.
• a writing member 20 having a circular cross section is also arranged coaxially to the central longitudinal axis L of the writing insert S.
• the writing member 20, which is preferably made of a hard, extruded plastic material, in particular polyacetal, extends beyond the right end 10e of the housing part 10 shown in the drawing figure into the fluid reservoir of the writing instrument, not shown.
• the writing element 20 protrudes from the housing part 10 and there has a writing tip 20a which is rounded.
• the writing member 20 is held and guided in its position by a guide device in the form of a guide sleeve 30, preferably made of metal, wherein the writing member 20 can be freely rotatable in the guide sleeve 30.
• the guide sleeve 30 has a first sleeve section 30a, which has an inner diameter that corresponds to the outer diameter of the writing element 20, and which is located outside the housing part 10 or the first housing section 10a.
• a second sleeve section 30b of the guide sleeve 30 is fastened in an annular recess 10f of the housing part 10, for example by gluing or by pressing, which extends from the left end face 10c into the interior of the first cavity section 14a.
• the annular recess 10f has an axial length that is less than the axial length of the first cavity section 14a, and has such an inside diameter that when the guide sleeve 30 is inserted, the inside diameter of the guide sleeve 30 merges smoothly into the inside diameter of the first cavity section 14a.
• the guide sleeve 30 is provided with a cone section 30c, which forms the transition from the first cavity section 30a to the second cavity section 30b.
• a clamping sleeve 40 is also attached, which is firmly connected to the writing element 20 via deformation points, in particular indentations.
• the clamping sleeve 40 is supported on the guide sleeve 30, in particular on the first sleeve section 30a, whereas it has a widening at its right end 40b.
• a spring element 50 in the form of a spiral spring made of metal is provided between the clamping sleeve 40 and the support surface 16.
• the spiral end 50 is supported with its left end on the widening 40b of the clamping sleeve 40 and with its right end, as has already been explained, on the support surface 16.

Landscapes

• Pens And Brushes (AREA)
• Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
• Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)

Applications Claiming Priority (3)

Publications (2)

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ID=7684648

Family Applications (1)

Country Status (7)

Families Citing this family (3)

Family Cites Families (12)

• 2001
  • 2001-05-14 DE DE10123279A patent/DE10123279A1/de not_active Ceased
• 2002
  • 2002-05-10 JP JP2002589273A patent/JP2004520980A/ja active Pending
  • 2002-05-10 EP EP02750914A patent/EP1392523B1/fr not_active Expired - Lifetime
  • 2002-05-10 US US10/477,536 patent/US7147394B2/en not_active Expired - Fee Related
  • 2002-05-10 ES ES02750914T patent/ES2314075T3/es not_active Expired - Lifetime
  • 2002-05-10 DE DE50212807T patent/DE50212807D1/de not_active Expired - Lifetime
  • 2002-05-10 AT AT02750914T patent/ATE409125T1/de active
  • 2002-05-10 WO PCT/EP2002/005188 patent/WO2002092360A1/fr active IP Right Grant

Non-Patent Citations (1)

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