DE8218916U1 - KNIFE WITH EXTENDABLE BLADE - Google Patents

Description

31 622/29-hü ^

11 JJlI>' >

- 1 -

"Knife with an extendable blade"

The invention relates to a knife with an exchangeable knife mounted in the handle that can be pushed out by means of a slide Knife blade.

Such, often known as box cutters Knives have already become known in a wide variety of designs. In particular, they find Also used when opening packages, as is required to a large extent by mail order companies. Included it has been shown that the knives previously used on the one hand pose a considerable risk to personnel mean that the knife slipping or falling must be expected again and again, not least of all this is because such work is often carried out in piecework. When opening the packages, help Cut a window into the top of the knife, through which the goods can be removed. It depends how Practice has shown that the packaged goods are often damaged.

20th

The invention is therefore based on the object of developing a knife of the type mentioned in such a way that both dis risk of injury to operating personnel, as also the risk of damage to the goods when opening cardboard boxes by cutting into a viewing window is considerably reduced in size, taking into account a rushed or careless way of working.

To solve this problem, the invention provides that the knife has a locking mechanism that limits the knife extension

I I

CC l I I C I

device has »the embodiment of the invention 1

by rigid, in particular on the housing and / or one of the I.

Slides that carry the knife blade form stops that are

educates should be. \

!

Due to the knife extension limit according to the invention, it is;

impossible for the user to determine a certain supernatant of the measurement \

sers over the front end of the cutter housing to liberschrei- r

ten. In practice, cutting into a [ Window in cardboard boxes, the knife blade protruded from a few millimeters to at most about 7 mm, while all available knives allow considerably more blade extensions.

Providing rigid unsolvable molded attacks Toggle \

imagine the also possible provision of releasable Anschlä- \

ge prevents the user from manipulating the knife so j * ¹

can that the blade, as usual, very far forward \

protrudes from the handle in order to be more possible in this way- \.

wise a cutting of viewing windows in I a little faster

To be able to carry out cardboard boxes, but at the expense of- [

more catchy, more expensive, in some companies already in t

the hundreds of thousands of DM damage to the goods. \

Due to the small protrusion of the knife, the jj; Reduced the risk of the knife j if it falls down;

drills into the leg or foot of the user, as previously ι

has happened over and over again. I.

In order to cut the string tension of packages quickly and easily despite the smaller knife protrusion to be able to lead is one embodiment of the invention at a distance from the front end of the housing, a section of the cutting edge of the knife blade regardless of its { Extension position exposing the side housing recess Ϊ intended. By catching the cord in the opening |

tion, with the housing at both ends of the recess f

If the blade protrudes, the result is an equally quick one and easy cutting open of the package like it was the case with the previous knife with a large knife protrusion over the front knife end, but without accepting the dangers associated with it so far.

Finally, it is also within the scope of the invention »to design the recess in this way and to provide it with boundary surfaces inclined towards the cutting edge and forward, j that the user's thumb can slide safely over the knife blade if it slips while working should come into the user's hand.

Further advantages, features and details of the invention emerge from asr following description of an embodiment and with reference to the drawing. Show:

1 shows a side view of a knife according to the invention, 20

2 shows a view of the knife with the upper shell of the housing removed,

3 shows a partial view corresponding to FIG. 2 in the retracted position of the knife and FIG

FIG. 4 is a perspective schematic illustration of FIG

Operation with a knife according to the invention when Cutting a package lacing. 30th

The knife shown represents a commercially available knife, the handle 1 of which consists of two shells which are provided with pins 2 or recesses 3 for such pins for mutual centering and by means of a screw 4, which is inserted into a thread 5 of the counter

Il I I 1 I.

shell engages, can be connected to each other. A carriage 6 is slidably mounted in the housing through a slot on the top 7 protruding slide 8 is adjustable in the longitudinal direction of the knife and on which the knife blade 9 is held can be. The holder consists of a pin 11 which optionally engages in recesses 10 on the upper edge of the knife 3 removed upper shell of the knife housing, the Mes serklinge 9 pressed against the carriage 6 so that they are with whose longitudinal displacement is pushed forward or withdrawn again. The multiple recesses 10 shown enable the knives to be adjusted in such a way that the maximum protrusion over the front of the Knife can optionally be changed before »user. Of the Slide 8 is disengaged and j engaged against the resistance of a spring. With one attached to the handle shell

j grid (16) can thus the knife over the entire

Length of the slot 7 optionally to different lengths

be driven out.

According to the invention, a rigid stop formed on the upper shell of the housing 1 is in the illustrated knife 12 provided, the displacement of the slide 8 according to limited forward so that even in the resting position of the knife blade on the carriage 6, which is the The greatest possible protrusion to the front allows the knife to protrude at most about 7 mm forwards from the housing can. This makes it impossible for the user to by any which manipulations are both susceptible to injury, as well as to cause damage when opening the packages for the larger protrusion of the knife.

Since such a short knife overhang makes cutting the package cords more difficult and cumbersome

"* Yy ■ * ■

To compensate for the knife, a lateral recess 13 arranged at a distance from the front end of the housing 1 is provided, which enables a particularly simple and problem-free cutting of a cord tension (cf. in particular FIG. 4). The recess is shaped and provided with inclined boundary surfaces 14 so that if the user's thumb slips, which, as shown in FIG the knife blade can slide away.

The invention is not limited to the exemplary embodiment shown. The thrust limitation according to the invention with simultaneous exposure of a double-sided tan Schneider.abschr.itts through a recess in the housing can be implemented in all known types and embodiments of such knives, in addition to the provision of detachable, for example screw-in, limit stops to prevent the Knife blade 9 also possible rigid attacks directly on the slide and the housing in the area of the slide track to form.

Claims (1)

. I t · · · · ■ ai | t «ii sii ! ■ a o «a a a a BBSlIl OO (»JAJVi Protection claims Knife with a knife blade mounted in the handle and extendable by means of a slider, characterized by a locking device that limits the extension of the knife. Knife according to claim 1, characterized in that the locking device by rigid, especially on Housing (1) and / or a knife blade (9) carrying Lowing carriage (6) formed stops (12) is. Knife according to claim 1 or 2 _9, characterized by a lateral housing recess (13) which is arranged at a distance from the front end of the housing (1) and exposes a section of the cutting edge (15) of the knife blade (9) regardless of its extended position. 4. Knife according to claim 3, characterized in that the housing recess (13) is designed and provided with boundary surfaces (14) inclined towards the cutting edge and forwards so that the thumb of the user is harmless over the cutting edge (15) of the knife blade (9 ) can slide away.