DE202012009918U1 - Writing instrument mechanics - Google Patents

Abstract

Writing implement mechanism for a writing implement with exchangeable writing lead, consisting of at least one barrel (1), a guide ring (2) and a compression spring (3), characterized in that the upper barrel part (1a) in the non-writing-side housing half (4) of a writing implement with replaceable The refill is fixed in position and that the lower shaft part (1b) is axially slidably and rotatably mounted in the writing-side housing half (5) of a writing instrument, the lower shaft part (1b) being a spring-elastic tongue (1c) with at least two axially offset pins (1d), (1e ) which comprises the guide ring (2), which is fixed in position in the writing-side housing half (5) and which has at least one inner undulating collar (2a) which has at least one wave crest (2b) and one wave trough (2c) , wherein the compression spring (3) which is mounted on the writing tip of a writing lead (6) and the non-writing end of d he supports the non-writing-side housing half (4), sits in the writing-side housing half (5) and the two housing halves (4), (5) under an axially apart pretension ...

Description

The invention relates to a writing instrument mechanism for a writing instrument with replaceable write mine as claimed in the claims.

Various writing instruments and mechanisms with rotating operation for extending and retracting the writing tip are known from the prior art.

For example, shows the US patent US20100074670 a writing implement with rotary actuator for sinking or releasing the writing tip. The rotary mechanism consists essentially of a latchable pin which is guided in a radially obliquely guided groove, wherein stops in the groove limit the rotation or actuation direction and different wall thicknesses to allow a locking position or assembly and disassembly of the writing instrument.

From the patent DE19602852 is also a twist mechanism with stop according to the principle of the sliding stroke, as he z. B. is widely used in lipsticks known. However, it was supplemented for a refill by radially extending claws on the housing body to separate the housing halves.

The patent DE20009728U also shows a rotary mechanism with sliding stroke and rotation stop, wherein a resilient element with pins in a radially obliquely guided groove a lock, similar to US patent US20100074670 However, after installation of the components is not solvable.

After utility model DE20009728U two pins are guided in a slot with rotation stop limit.

The patents US20070248398 . WO2005092637 . DE2305002 also show a variant of the sliding link, which in principle has a rotation stop and an axially extending guide groove.

Depending on the structural design of the sliding link is associated with a more or less high number of components. In contrast, the US patent shows US20100074670 a simpler structure, however, the rotational actuation is limited by stops in the guide groove and the complex wall thickness jumps in the sleeve and the locking tongues can be compared to the use of non-ferrous metals in high-quality writing instruments, only in Kunststoffspitzußverfahren produce economically. In addition, the use of this mechanism seems feasible only for a custom designed writing instrument, since the elements are integrated in the sleeve parts and a different shape requires a new development or new tools. Furthermore, the guide groove forms an aesthetically unsatisfactory breakthrough of the write housing wall and it is sensitive to dirt.

The invention is therefore an object of the invention to provide a universal writing utensils rotary mechanics that can connect a variety of writing case halves in different materials and shapes together, provides a high ease of use by non-stop rotary actuator, optically hardly appears, a simple change of writing mine allowed and compared to The state of the art can be produced more cost-effectively and with fewer components and is easy to assemble.

This object is achieved in that the writing instrument mechanism for a writing instrument with replaceable write mine two write housing halves releasably connects and simultaneously forms a switching mechanism, wherein the upper shaft part is fixed in position in the non-writing side half housing by means of an undercut and the lower shank part in the writing side half of a writing instrument is axially slidably mounted and rotatable.

The lower shaft part has a resilient tongue with two pins, which enclose the inner wavy collar of the guide ring sliding and in the axial direction.

With opposite rotation of the write housing halves about the central axis, a writing instrument thus equipped can be transferred from the rest position to the writing position by the non-writing side housing half, in which the non-writing end of a writing lead is mounted, with the shaft bottom and the pin along the wave-shaped collar moves axially and the writing tip of the mine by a hole ( 5b ) in the write-side housing half free or, in opposite rotation, covering.

The compression spring, which is supported on the write-side housing half and holds the two housing halves under an axially pressing apart bias is stored at the writing tip of a writing lead and its non-writing end is in turn supported on the non-writing side housing half.

The wave-shaped collar in the guide ring has a complementary to the write side seated pin recess in the write-side trough, in which the pin engages by means of the bias of the compression spring and thus the Writing position of the write housing halves fixed to each other.

The wave crest, which is located on the undulating collar and which is oriented toward the non-writing side half of the housing, has a pull-out bevel over which the lower pin formed on the writing side half of the housing can slide when the writing case halves are pulled apart by the resilient properties of the tongue. In the rest position of the writing instrument are the axially offset pins in this, the pen halves detachable, position. This facilitates the dismantling for writing mine change, since only a small tensile force must be expended.

Trained to the writing-side housing half lower pin has an insertion bevel in the direction of the wavy collar of the guide ring, so that the lower pin slides when compressing the write housing halves on the undulating collar and undercut snaps, with the non-writing-side housing half formed, the upper pin Stop forms. This snap connection facilitates manufacturing assembly and reassembly after the write-mine change since only a small amount of compressive force has to be expended and the pen case halves snap independently of each other.

Since the guide is generated in the axial direction, as is technically common by means of a groove, by a, comprising two pins, wave-shaped collar on the shaft, the write housing halves can be rotated without impact and direction independent for actuation in the writing or rest position against each other. In this case, the inner distance of the two pins to each other is so large that the collar is axially largely free of play, but still slidably bordered.

When installed shaft and guide ring are largely hidden by the housing halves and can be, without major influence on the overall appearance, masses and inexpensive z. B. produce by injection molding. The spring may be a spiral spring made of metal wire, as it is manufactured in high quantities and very cheap.

Due to the simple and universal assembly by means of snapping or pressing of the shaft and guide ring in the write housing halves considerable costs can be saved and also any number of variants and forms of writing instruments are formed, which are to be provided only with a groove for the frets.

• 1. Sind die Schreibgehäusehälften hülsenartig mit einer zylindrischen Bohrung und einer Nut für die Fixierung des Schaftes und des Führungsringes versehen.
• 2. Weist der zur schreibseitigen Gehäusehälfte ausgebildete Zapfen eine Einführ-Schräge in Richtung des wellenförmigen Kragens des Führungsringes aufweist und der wellenförmige Kragen am Wellenberg zur schreibseitigen Gehäusehälfte orientiert, eine Herauszug-Schräge auf.
• 3. Befindet sich im wellenförmige Kragen im Führungsring eine zum Zapfen komplementär geformte Ausnehmung in dem zum schreibseitigen Gehäusehälfte gerichteteten Wellental, in welches der zur schreibseitigen Gehäusehälfte ausgebildete Zapfen lösbar einrastet.
• 4. Weist der Führungsring einen äußeren Bund auf, der hinterschnittig in einer komplementären Nut in der schreibseitigen Gehäusehälfte sitzt.
• 5. Weist das Schaftoberteil in der nicht-schreibseitigen Gehäusehälfte mindestens einen äußeren Bund auf, der hinterschnittig in einer komplementären Nut in der nicht-schreibseitigen Gehäusehälfte sitzt.

In a preferred embodiment of the invention

• 1. Are the write housing halves sleeve-like provided with a cylindrical bore and a groove for fixing the shaft and the guide ring.
• 2. Has the pin formed on the writing-side housing half has an insertion bevel in the direction of the wavy collar of the guide ring and the wave-shaped collar oriented on the wave mountain to write-side housing half, a pullout bevel on.
• 3. Is located in the wave-shaped collar in the guide ring a pin complementary shaped recess in the write-side half of the housing directed wave trough, in which the pin formed on the writing-side housing half pin releasably engages.
• 4. Has the guide ring on an outer collar, which sits undercut in a complementary groove in the write-side housing half.
• 5. Has the upper shaft part in the non-writing side half of the housing at least one outer collar, which sits undercut in a complementary groove in the non-writing side housing half.

• 1. Weist der äußere Bund (1g) mindestens eine federelastische Kralle auf oder wird aus ihr gebildet und greift hinterschnittig in die Nut (4a) ein.
• 2. Umfasst statt der Zapfen (1d), (1e) eine komplementär zu Wellenberg (2b) und Wellental (2c) ausgeformte Nut in der Zunge (1c) den Kragen (2a) gleitend axial ein.
• 3. Sind andere Federn als die Schraubenfeder geeignet, zum Beispiel eine Elastomer-, Biege-, Luft- oder Evolutfeder.

According to another proposal of the invention

• 1. Does the outer collar ( 1g ) at least one spring-elastic claw on or is formed from it and engages undercut in the groove ( 4a ) one.
• 2. Includes instead of the pins ( 1d ) 1e ) a complementary to Wellenberg ( 2 B ) and wave trough ( 2c ) shaped groove in the tongue ( 1c ) the collar ( 2a ) sliding axially.
• 3. Are springs other than the coil spring suitable, for example, an elastomer, bending, air or Evolutfeder.

Drawing:

With reference to the figures, the preferred embodiment of the invention is explained in detail. It shows a writing instrument with writing instrument mechanism for a writing instrument with replaceable writing lead in side view, partly in section:

1a at rest,

1b its cylindrical development of shaft and guide ring in 0 ° rotational position,

2a in writing position,

2 B its cylindrical development of shaft and guide ring in +/- 180 ° rotational position.

How out 1a shows, the writing instrument is in the rest position and the Writing tip of the writing lead ( 6 ) is through the write-side housing half ( 5 ) obscured. The writing instrument mechanism for a writing instrument is mounted so that the shaft ( 1 ) with the shaft upper part ( 1a ) by means of a federal ( 1g ) and a groove ( 4a ) undercut into the non-write-side housing half ( 4 ) is pressed in and fixed in position. The lower part of the shaft ( 1b ) is opposite the write-side housing half ( 5 ) diameter-reduced and immersed in it axially. At the end of the shaft lower part ( 1b ) is a resilient tongue ( 1c ), whose cones ( 1d . 1e ) the wavy collar ( 2a ) of the guide ring ( 2 ) at the top and bottom edges. The guide ring ( 2 ) is as well as the shaft upper part ( 1a ) over a covenant ( 2g ) and a groove ( 5a ) undercut into the write-side housing half ( 5 ) pressed in and fixed in position. The guide ring ( 2 ) each has a wave crest ( 2 B ) and a wave trough ( 2c ) on. In the rest position, the pins ( 1d . 1e ) on the wave crest of the collar ( 2a ) to lie; this position is determined by the bias of the compression spring ( 3 ) releasably fixed, since the pin ( 1e ) in the positive bottom side of the collar ( 2a ) on the wave mountain ( 2 B ) locks. In the rest position, the housing halves ( 4 . 5 ) to change the mine, since with opposite train the resilient tongue ( 1c ) with the pin ( 1e ) on the pull-out bevel ( 2d ) on the guide ring ( 2 ) slides.

1b shows the cylindrical development as the outer lateral surface of shaft ( 1 ) and guide ring ( 2 ) in the 0 ° position or rest position of the writing instrument.

In 2a It is shown how with radial rotation of the handle ( 2 ) by 180 ° the writing instrument from the rest position in 1a can be transferred to the writing position. The pins slide ( 1d . 1e ) along the undulating lower and upper edge of the collar ( 2a ) from the guide ring ( 2 ) until the pin ( 1e ) in the recess of the collar ( 2a ) by means of the axial bias of the compression spring ( 3 ) engages. The housing halves ( 4 . 5 ) by the wavy leadership of the writing instrument mechanism for a writing instrument with interchangeable write mine to each other, so that the writing tip of the writing mine ( 6 ) through the hole ( 5b ) in the housing half ( 5 ) pushes and is released.

2 B shows the cylindrical development as the outer lateral surface of shaft ( 1 ) and guide ring ( 2 ) in the 180 ° position or writing position of the writing instrument.

The 1a . 1b . 2a . 2 B show the writing instrument in the mounted state. For mounting the writing instrument for the production or after disassembly for the change of the writing mine ( 6 ), the pen case halves ( 4 . 5 ) pressed on each other. The pin slides ( 1e ) of the resilient tongue ( 1c ) about its insertion slope ( 1f ) over the non-writing edge of the collar ( 2a ) of the guide ring ( 2 ) and the opposite pin ( 1d ) forms the abutment to the writing side edge of the collar ( 2a ).

LIST OF REFERENCE NUMBERS

1

shaft

1a

Stem cover

1b

Stem base

 1c

tongue

1d

spigot

1e

spigot

1f

Insertion slope

 1g

Federation

2

guide ring

2a

collar

2 B

Wellenberg

2c

trough

2d

Herauszug Slant

2e

recess

2g

Federation

3

compression spring

4

Non-write-side housing half

4a

groove

5

write-sided housing half

5a

groove

5b

drilling

6

writing lead

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• US 20100074670 [0003, 0005, 0008]
• DE 19602852 [0004]
• DE 20009728 U [0005, 0006]
• US 20070248398 [0007]
• WO 2005092637 [0007]
• DE 2305002 [0007]

Claims (8)

Writing device mechanism for a writing instrument with replaceable writing lead, consisting of at least one shaft ( 1 ), a guide ring ( 2 ) and a compression spring ( 3 ), characterized in that the shaft upper part ( 1a ) in the non-writing-side housing half ( 4 ) of a writing instrument with interchangeable writing lead is fixed in position and that the lower shank ( 1b ) in the write-side housing half ( 5 ) of a writing instrument is axially slidably and rotatably mounted, wherein the lower shaft part ( 1b ) a resilient tongue ( 1c ) with at least two axially offset pins ( 1d ) 1e ), which the guide ring ( 2 ), which in the write-side housing half ( 5 ) is fixed in position and the at least one inner wave-shaped collar ( 2a ) having at least one wave crest ( 2 B ) and a wave trough ( 2c ), sliding axially, wherein the compression spring ( 3 ) at the writing tip of a writing mine ( 6 ) and whose non-writing end is attached to the non-writing-side housing half ( 4 ) is supported, in the write-side housing half ( 5 ) and the two housing halves ( 4 ) 5 ) holds under an axially pressing apart bias. Writing implement mechanism for a writing instrument with replaceable writing lead according to claim 1, characterized in that the write-sided housing half ( 5 ) formed cones ( 1d ) an insertion bevel ( 1f ) in the direction of the wave-shaped collar ( 2a ) of the guide ring ( 2 ) and the wave-shaped collar ( 2a ) on the wave mountain ( 2 B ) to the write-side housing half ( 5 ), a pullout bevel ( 2d ) having. Writing instrument mechanism for a writing instrument with exchangeable writing lead according to claim 1, characterized in that the wave-shaped collar ( 2a ) in the guide ring ( 2 ) a pin complementary shaped recess ( 2e ) in the write-side housing half ( 5 ) wave trough ( 2c ), in which the write-sided housing half ( 5 ) formed cones ( 1d ) releasably engages. Writing implement mechanism for a writing instrument with replaceable writing lead according to claim 1, characterized in that the guide ring ( 2 ) an outer collar ( 2g ) which undercut in a complementary groove ( 5a ) in the write-side housing half ( 5 ), wherein the material pairing of the write-side housing half ( 5 ) and the guide ring ( 2 ) and the dimensioning of the groove ( 5a ) and the write-side housing half ( 5 ) is selected so that the elasticity of the respective materials press-fitting, without permanent deformation of the write-side housing half ( 5 ) or the guide ring ( 2 ), allowed. Writing instrument mechanism for a writing instrument with replaceable writing lead according to claim 1, characterized in that the upper part of the shaft ( 1a ) in the non-writing-side housing half ( 4 ) at least one outer collar ( 1g ) which undercut in a complementary groove ( 4a ) in the non-writing-side housing half ( 4 ), wherein the material pairing of the non-writing-side housing half ( 4 ) and the guide ring ( 2 ) and the dimensioning of the groove ( 4a ) and the non-writing-side housing half ( 4 ) is selected so that the elasticity of the respective materials press-fitting, without permanent deformation of the non-writing-side housing half ( 4 ) or the upper part of the shaft ( 1a ) allowed. Writing instrument mechanism for a writing instrument with replaceable writing lead according to claim 1 and 5, characterized in that the outer collar ( 1g ) has at least one resilient claw or is formed from it and this undercut in the groove ( 4a ) intervenes. Writing implement mechanism for a writing instrument with replaceable writing lead according to claim 1, 2 and 3 characterized in that instead of the pin ( 1d ) 1e ) a complementary to Wellenberg ( 2 B ) and wave trough ( 2c ) shaped groove in the tongue ( 1c ) the collar ( 2a Sliding axially comprises. Writing instrument mechanism for a writing instrument with replaceable writing lead according to claim 1, characterized in that the compression spring ( 3 ) is an elastomer, screw, bending, air or Evolutfeder.

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