Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
  • B43K—IMPLEMENTS FOR WRITING OR DRAWING
  • B43K29/00—Combinations of writing implements with other articles
  • B43K29/02—Combinations of writing implements with other articles with rubbers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
  • B43K—IMPLEMENTS FOR WRITING OR DRAWING
  • B43K21/00—Propelling pencils
  • B43K21/02—Writing-core feeding mechanisms
  • B43K21/06—Writing-core feeding mechanisms with the writing-cores fed by means sliding in longitudinally-slotted casings

Definitions

• the invention is directed to a fine lead pencil or the like with a tubular base body and with a lead adjusting device for extending and retracting or pushing the lead and an eraser arranged at the rear end.
• Such fine lead pencils are conventionally constructed such that the lead can be extended or released for pushing back by means of a push button at the rear end of the base body of the pencil.
• a push button designed as a cap is an eraser inserted in a sleeve which serves as a storage container for a plurality of mines.
• Mechanisms for adjusting the mine are also known per se, which are actuated radially from the outside by a push button to retract the mine. Mechanisms of this type are commercially available under the name “double knock” or “double push” system.
• the invention is based on the object of designing a fine lead pencil of the type mentioned at the outset in such a way that the handling of the eraser is simplified and improved.
• This object is achieved in that the actuating devices for the mine adjusting device are arranged overall on the lateral surface of the base body, and that the eraser can be extended and retracted into the base body by means of a longitudinally displaceable actuating device.
• the rear side of such a fine pencil is free to receive an eraser, so that it can be stored in and pushed out in the manner according to the invention.
• the eraser can be easily brought into the desired position of use when it is needed and can be extended more or less depending on the load. After use, the eraser is moved back into the interior of the base body of the pen, so that the same is avoided.
• This construction also makes it possible to make the diameter of the eraser relatively large, so that it is also suitable for extensive erasing work.
• the actuating device for the eraser is designed to be stable in end positions and intermediate layers. This means that the eraser more or less according to its degree of wear can be extended far and remains stable in this end position during the pressurization by the erasing process.
• the end or intermediate position stability of the actuating device for the eraser is advantageously achieved by a defined static friction between the actuating device and the base body.
• the actuating device comprises a sleeve section which at least partially encompasses the base body and is in contact with it.
• a relatively large friction surface which ensures a defined static friction is formed.
• this construction also has the advantage that the sleeve portion is pressed against the base body when the pen is being erased, thereby fixing the selected extension state of the eraser.
• the actuating device of the mine adjusting device is formed by a corresponding sleeve section.
• the two sleeve sections know to be arranged around the base body of the pin so that they each cover an angular range of almost 180 °.
• the sleeve-like actuating device for the lead adjusting device thus provided performs the function which is conventionally carried out by a push button arranged on the back of the pen.
• a push button can be arranged on the lateral surface, which is actuated to reset the mine.
• the eraser is advantageously fastened in a form-fitting manner in a cup-like holder which is connected to the actuating device. This makes it possible to fix the eraser so that it can be replaced after use, or to use an eraser of the desired hardness.
• the actuating device for the eraser has an extension which penetrates a longitudinal slot in the base body and is connected to the holder of the eraser by ultrasonic welding. In this way it is possible to establish the connection in the preassembled state.
• the actuating device for the eraser in particular the corresponding sleeve section, to the holder by means of screws or the like. The same goes for basically also for the actuating device for the mine adjusting device.
• Fig. 1 shows a longitudinal section through a fine lead pencil according to the invention
• Fig. 2 is a side view corresponding to Figure 1.
• a fine lead pencil shown in the drawing comprises a tubular base body 1. On the front side of this base body 1 there is a grip sleeve 2, which on the outside is provided with ribbing which increases the grip in the form of a plurality of concentric, circumferential grooves 3.
• the grip sleeve 2 can be pivoted about a tip section 4 and is countersunk with respect to this or with respect to the lateral surface 5 of the base body 1.
• the tip section 4 has at its inner end a threaded section 6, not shown in detail in the drawing, which can be screwed into an internal thread of the base body 1 in such a way that the grip sleeve 2 can be fixed in a certain angular position it is possible to set the type of mine used in each case and to make it visible for later use by means of a viewing window 7 and different markings placed underneath on the tip section 4.
• the mine adjusting device 8 is only indicated schematically in FIG. 1, since it is commercially available as such.
• the lead adjusting device 8 is actuated via an actuating device 9, which comprises a sleeve section 10, which - as can be seen in FIG. 2 - engages around the circumferential surface 5 of the base body 1 approximately semi-circularly.
• a clip 11 is attached to the sleeve section 10 in order to be able to attach the pin to pockets or the like in a known manner.
• a shoulder 12 of the sleeve section 10 passes through a slot 13 in the lateral surface 5 of the base body 1 and is ultrasonically welded to a shoulder 14 made of plastic of the mine adjusting device 8.
• the actuating device 9 is moved forward in the direction of the arrow 16.
• the shoulder 17 of the clip 11 serves as a comfortable stop for the actuating thumb.
• the approach 14 transmits the actuation force in the axial direction to the mine adjusting device 8.
• the mine 15 is reset in a manner known per se by means of a push button 18 which is arranged in the outer surface 5 and which interacts with a spring 19 which is only indicated.
• an eraser 21 is arranged, which is positively fixed in a cup-like recess 22 of a holder 23, so that it can be replaced if necessary.
• the holder 23 has an extension 24 which is arranged with an inclined surface 25 offset from a parallel inclined surface 26 of the extension 14 in the interior of the base body 1.
• the neck 24 is ultrasonically welded to a neck 27 which penetrates a slot 28 in the lateral surface 5 of the base body 1 and is integrally connected to a sleeve section 29.
• the sleeve section 29 forms with the extension 27 an actuating device 30 for the adjustment of the eraser 21.
• the eraser 21 After a longitudinal displacement in the direction of arrow 30, the eraser 21 remains in a set end position once, since there is a defined static friction between the lateral surface 5 and the sleeve section 29 and, moreover, the static friction caused by the sleeve section 29 engaging, due to its flat design finger grasping each case is increased.
• a particularly appealing design is also achieved in that the two sleeve sections 10 and 29 practically complete a complete sleeve over a certain axial section, the rear edges 31, 32 of the two sleeve sections 10, 29 being aligned with one another in the basic position.

Landscapes

• Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
• Clips For Writing Implements (AREA)
• Knives (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6334819

Family Applications (1)

Country Status (3)

Families Citing this family (1)

Citations (4)

Family Cites Families (10)

• 1987
  • 1987-08-29 DE DE19873728954 patent/DE3728954A1/de active Granted
• 1988
  • 1988-08-24 WO PCT/DE1988/000514 patent/WO1989001877A1/de active Application Filing
  • 1988-08-24 EP EP88113757A patent/EP0305872B1/de not_active Expired - Lifetime
  • 1988-08-24 DE DE8888113757T patent/DE3867388D1/de not_active Expired - Fee Related

Patent Citations (4)

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